Textile effluents are highly colored for synthetic dyes, cause significant water pollution due to... more Textile effluents are highly colored for synthetic dyes, cause significant water pollution due to high pH, TDS, EC, BOD, and COD content, and are harmful to aquatic species. Among different treatment processes, biological treatment process is considered as a promising approach. In this investigation, a mixed aerobic bacterial consortium was used for the treatment of wastewater. In addition, the fenton process with a normal sand filter was used for treatment and compared with the biological method. The mean values of BOD, COD, TDS, EC, DO, and pH in the raw wastewater indicated that the effluent was highly contaminated according to Bangladesh standard (ECR, 1997). Both the biological treatment process and fenton process separately showed promising removal of pollution load. The aerobic mixed bacterial consortium reduced TDS (66.67%), EC (60%), BOD (91.67%), and COD (85.45%) and fenton process reduced TDS (74.71%), EC (55.11%), BOD (88.33%), and COD (83.63%) compared to the raw effluent bacterial consortium simultaneously degraded dyes and decolorized the wastewater from dark deep green to transparent. Color removal for the mixed aerobic bacterial process after 72 hours of aeration was 58.57% and for the fenton process with a normal sand filter was 80%. BOD and COD removal percentages for aerobic mixed bacterial consortium showed higher removal efficiency than the fenton process with a normal sand filter. Though 92 hours of aeration showed the maximum satisfactory result, aeration time could be reduced to 72 hours which also satisfied the Bangladeshi standard (ECR, 1997).
Noakhali Pourashava is an important municipality in southern Bangladesh, faces severe waterloggin... more Noakhali Pourashava is an important municipality in southern Bangladesh, faces severe waterlogging problems every year during the monsoon period. The present study aimed to investigate the major causes of waterlogging and its negative effects on life, from the viewpoint of people residing in different areas of Noakhali Pourashava, various government, non-government, development organizations as well as various stakeholders including experts. It has been found that Noakhali Pourashava experienced waterlogging during peak monsoon season in ward no. 1, 2, 4, 5, and 8. Most of the inhabitants/respondents of the Noakhali Pourashava claimed that lack of drainage facility; excessive rainfall; inadequate, low capacity and conventional drainage system; natural siltation; improper waste management; absence of proper inlets and outlets; and blockage and encroachment of existing drainage are responsible for waterlogging. It has ascertained that the water logging becomes a burden for the inhabit...
Journal of Multidisciplinary Applied Natural Science, 2021
Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was e... more Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was experimented to eliminate lead (Pb2+) from an aqueous solution following batch experiments. The functional groups of banana peel were identified by Fourier-transform infrared spectroscopy (FTIR). The adsorption mechanism was studied by the Langmuir and Freundlich adsorption isotherm model and determined the separation factor from the Langmuir adsorption isotherm. The adsorption of Pb2+ on dried banana peel had been studied at different adsorbent doses, pH, initial concentration of Pb, contact time, temperature, and agitation speed. After adsorption, Pb2+ was measured using atomic absorption spectroscopy (AAS). Maximum adsorption had taken place at pH 5 for adsorbent dose 45 g L-1. The optimum contact time and agitation speed was 30 minutes and 150 rpm, respectively for the initial Pb concentration of 100 ppm at 25°C. Both, Langmuir and Freundlich adsorption isotherm models shows the best ...
In the present investigation, coagulation-flocculation and fenton process in conjunction with phy... more In the present investigation, coagulation-flocculation and fenton process in conjunction with phytoremediation by water hyacinth (Eicchornia crassipes) were applied to treat the most frequently occurred contaminants in textile wastewater. The mean values of EC, TDS, turbidity, pH, DO, BOD, COD and TOC in the raw effluents were 2300 μSCm-1, 1260 mgL-1, 48.28 FTU, 10.5, 1.2 mgL-1, 265 mgL-1, 522 mgL-1 and 12.8 mgL-1, respectively whereas the average concentration of Cr, Pb, Mg, Cu, Ni and Zn was 0.86, 1.21, 10.97, 0.47, 2.85 and 0.52 mg/L, correspondingly which evidently indicated that the effluents were highly contaminated compared to Bangladeshi standard. The results demonstrated that the values of EC, TDS, turbidity, pH, BOD, COD and TOC reduced significantly compared to raw effluents by both coagulation-flocculation and fenton processes and meet the standards set by BDS-ECR except BOD and DO. After being treated the COD value reduced to 70 mg/L (86.56%) and 188 mg/L (63.985%) from...
Present Environment and Sustainable Development, 2020
Untreated wastewater disposal from industries has been a crucial environmental issue for developi... more Untreated wastewater disposal from industries has been a crucial environmental issue for developing countries like Bangladesh. The current study aims to investigate the status of Effluent Treatment Plant (ETP) and the quality of effluents in the Noakhali industrial area, Bangladesh. Total 10 industries were surveyed and the ETP status showed that about 30% of industries do not have ETP facilities and only 30% of industries use their ETP for the treatment of the effluents where the rest of the industry’s ETPs were under construction or exit but not used. Effluent samples were collected from seven locations near the discharge points of various industries. All the physicochemical parameters were determined using standard analytical procedures and analyzed the values comparing with the guideline standard by the Department of Environment (DoE), Bangladesh. The average values of electric conductivity (EC) have exceeded the tolerable limit in maximum effluent samples. On the contrary, the ...
Journal of Applied Life Sciences International, 2020
Groundwater is an essential and valuable natural source of drinking water. But sometime ground wa... more Groundwater is an essential and valuable natural source of drinking water. But sometime ground water contains different types of chemical or biological substance which make water unsuitable for consumption. Quality of the ground water varies in different location. The recent study emphasized on monitoring the present condition of groundwater in the coastal region of Noakhali. The study area covered 24 different locations of two large Upazila Subarnachar and Kabirhat of Noakhali District. Groundwater quality was examined by analyzing various physicochemical parameters and microbial parameters such as pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity, Total Hardness, Potassium, Sulphate, Chloride ions, Total Coliform, Fecal Coliform, and Total Bacterial Viable Count. These parameters were compared with the drinking water quality standards recommended by WHO and Bangladesh local standards. From the analysis, it was observed that pH, Sulphate, Potassium were withi...
Current Journal of Applied Science and Technology, 2020
Textile effluent contains dye and harmful chemicals which are difficult to remove. This study was... more Textile effluent contains dye and harmful chemicals which are difficult to remove. This study was conducted to find out the cost effective and efficient textile effluent treatment process. In this regard, coagulation-flocculation and Fenton treatment process were applied in which pH, Dissolve Oxygen, TOC (Total Organic Carbon), COD (Chemical Oxygen Demand), TDS (Total Dissolve Solid) and EC (Electro-conductivity) were analyzed before and after the treatment. Conventional Jar test was used for coagulation and flocculation process where chemical coagulants (FeSO4 and Ca(OH)2) were added to different doses. On the other hand, Hydroxyl (OH.) radical, a byproduct of reaction between hydrogen peroxide (H2O2) and ferrous sulphate (FeSO4) was used in Fenton treatment processas a strong oxidant capable of oxidizing various organic compounds. In coagulation-flocculation process the maximum reduction of pH (6.3-6.8), TDS (400 mg/l), EC (1110 µs/cm), COD (86.56%) and TOC (97.81%) was found afte...
Surface water is usually turbid to some extent. Coagulation and flocculation are commonly used me... more Surface water is usually turbid to some extent. Coagulation and flocculation are commonly used methods for water turbidity removal, and are usually conducted by adding chemicals such as salts of aluminium and iron and polyelectrolytes. The main objective of this study was to reduce turbidity the water of the Bangshi River with natural coagulant. Tamarindus indica, Litchi chinensis, Dolichos lablab seeds powder were used as natural coagulant. pH, conductivity, total dissolved solids and COD was also measured. Jar test was used for this purpose. Initial turbidity was 90.3 NTU. Polyaluminium chloride (PAC) was used as coagulant aids respectively. The turbidity reduction efficiency of Litchi chinensis for 50, 75 and 100 mg/l dose are 95.19%, 96.61% and 94.51%. The turbidity reduction efficiency of Tamarindus indica for 50, 75 and 100mg/l dose are 80.61%, 97.50% and 87.50%. The turbidity reduction efficiency of Dolichos lablab for 50, 75 and 100mg/l are 86.01%, 87.70% and 84.77%. Maximum...
Current Journal of Applied Science and Technology, 2020
Textile effluents contain complex characteristics with different physicochemical parameters and c... more Textile effluents contain complex characteristics with different physicochemical parameters and colorful dye. It is difficult to remove all types of pollutant using a specific treatment process. In this study adsorption filtration alone then Fenton process with sand-gravel mixed filtration and activated charcoal filtration was applied. Fenton process is very effective process for Chemical Oxygen Demand (COD) and Dissolve Organic Carbon (DOC) removal. And Activated carbon is a suitable adsorbent for dye removal. Physicochemical parameters like, COD, DOC, Total Dissolve Solid (TDS), Dissolve Oxygen (DO), Electric conductivity (EC), and pH was measured before and after the treatment process. After filtration by adsorbent filter all the parameter reduced than raw effluent Original Research Article Hossain et al.; CJAST, 39(28): 21-31, 2020; Article no.CJAST.60827 22 but when Fenton process with sand filtration and activated charcoal filtration was applied all the parameter drastically c...
Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was e... more Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was experimented to eliminate lead (Pb2+) from an aqueous solution following batch experiments. The functional groups of banana peel were identified by Fourier-transform infrared spectroscopy (FTIR). The adsorption mechanism was studied by the Langmuir and Freundlich adsorption isotherm model and determined the separation factor from the Langmuir adsorption isotherm. The adsorption of Pb2+ on dried banana peel had been studied at different adsorbent doses, pH, initial concentration of Pb, contact time, temperature, and agitation speed. After adsorption, Pb2+ was measured using atomic absorption spectroscopy (AAS). Maximum adsorption had taken place at pH 5 for adsorbent dose 45 g L-1. The optimum contact time and agitation speed was 30 minutes and 150 rpm, respectively for the initial Pb concentration of 100 ppm at 25°C. Both, Langmuir and Freundlich adsorption isotherm models shows the best ...
The Dhaleswari river is considered as one of the most important rivers of Bangladesh due to its g... more The Dhaleswari river is considered as one of the most important rivers of Bangladesh due to its geographical location and ecological services. The present study attempts to evaluate the degree of heavy metal pollution, contamination, and accumulative behavior in the sediment of the Dhaleswari river. The sediment samples were collected from fifteen different locations of the Dhaleswari river. Heavy metals were analyzed using the Flame Atomic Spectrophotometer (FAAS). The mean concentrations of Zn, Cu, Cr, Pb and Cd were 131.9, 48.89, 43.16, 33.23 and 0.37 mgkg-1, respectively. According to the United States Environmental Protection Agency (USEPA) Sediment Quality Guideline, the sediment of most of the locations were not polluted for Pb and Cd. But S-11 location for Cd (0.8 mg kg-1) was highly polluted. For Cr, Cu and Zn, maximum locations were moderately polluted. Although the geo-accumulation index (Igeo) values of Dhaleswari river sediments showed almost no severe contamination fo...
Abstract: The present study was conducted to assess the efficacy of powder extracted from mature-... more Abstract: The present study was conducted to assess the efficacy of powder extracted from mature-dried Tamarindus indica and Litchi chinensis seeds for the turbidity reduction of polluted river water. Efficiency of Tamarindus indica and Litchi chinensis in removal of turbidity was compared with a synthetic coagulant Polyaluminiumchloride(PAC). The jar test experiment was performed to treat sample water using seed extracts along with PAC in laboratory condition. Polyacrylamide (PAM) was used as a model coagulant to aid the coagulation process. Water samples were analyzed before and after
Noakhali Pourashava is an important municipality in southern Bangladesh, faces severe waterloggin... more Noakhali Pourashava is an important municipality in southern Bangladesh, faces severe waterlogging problems every year during the monsoon period. The present study aimed to investigate the major causes of waterlogging and its negative effects on life, from the viewpoint of people residing in different areas of Noakhali Pourashava, various government, non-government, development organizations as well as various stakeholders including experts. It has been found that Noakhali Pourashava experienced waterlogging during peak monsoon season in ward no. 1, 2, 4, 5, and 8. Most of the inhabitants/respondents of the Noakhali Pourashava claimed that lack of drainage facility; excessive rainfall; inadequate, low capacity and conventional drainage system; natural siltation; improper waste management; absence of proper inlets and outlets; and blockage and encroachment of existing drainage are responsible for waterlogging. It has ascertained that the water logging becomes a burden for the inhabitants of the Pourashava and creating adverse effects on livelihood, society, infrastructure, economy and environment. Other notable adverse effects of waterlogging are disruption of traffic movement and normal life, structures and infrastructure damage and loss of income potentials with a lot of sufferings. The stagnant water acts as a breeding site for the vectors of various diseases and becomes a health hazard to people residing in the waterlogged area. The current study suggests that close coordination among Pourashava authorities, local government agencies and a strong collaboration between public and private sectors as well as local people participation are essential for solving the waterlogging problem effectively and sustainably.
Present Environment and Sustainable Development, 2020
Untreated wastewater disposal from industries has been a crucial environmental issue for developi... more Untreated wastewater disposal from industries has been a crucial environmental issue for developing countries like Bangladesh. The current study aims to investigate the status of Effluent Treatment Plant (ETP) and the quality of effluents in the Noakhali industrial area, Bangladesh. Total 10 industries were surveyed and the ETP status showed that about 30% of industries do not have ETP facilities and only 30% of industries use their ETP for the treatment of the effluents where the rest of the industry's ETPs were under construction or exist but not used. Effluent samples were collected from seven locations near the discharge points of various industries. All the physicochemical parameters were determined using standard analytical procedures and analyzed the values comparing with the guideline standard by the Department of Environment (DoE), Bangladesh. The average values of electric conductivity (EC) have exceeded the tolerable limit in maximum effluent samples. On the contrary, the temperature, pH, and total dissolved solids (TDS) values were within the standard limit for all of the collected effluent samples. The chloride concentration of the three effluent samples surpassed the limit. The biological oxygen demand (BOD) and chemical oxygen demand (COD) limit were exceeded for the effluent sampling sites S-6 and S-7 collected near the food and beverage industry. Besides, the maximum dissolved oxygen (DO) values of the effluents were below the standard which indicates poor water quality. Environmental nuisance is producing in Noakhali industrial area as maximum industries have not enough wastewater treatment facilities. Present study demonstrated that it is obvious Md. Shiblur Rahaman, Fozia Momotaz, Afrida Nurain, Protima Sarker, Sahoko Ichihara 152 to operate the ETP regularly for improving the quality of effluents to save our native environment from the harmful effects of wastewater.
In the present investigation, coagulation-flocculation and fenton process in conjunction with phy... more In the present investigation, coagulation-flocculation and fenton process in conjunction with phytoremediation by water hyacinth (Eicchornia crassipes) were applied to treat the most frequently occurred contaminants in textile wastewater. The mean values of EC, TDS, turbidity, pH, DO, BOD, COD and TOC in the raw effluents were 2300 µSCm-1 , 1260 mgL-1 , 48.28 FTU, 10.5, 1.2 mgL-1 , 265 mgL-1 , 522 mgL-1 and 12.8 mgL-1 , respectively whereas the average concentration of Cr, Pb, Mg, Cu, Ni and Zn was 0.86, 1.21, 10.97, 0.47, 2.85 and 0.52 mg/L, correspondingly which evidently indicated that the effluents were highly contaminated compared to Bangladeshi standard. The results demonstrated that the values of EC, TDS, turbidity, pH, BOD, COD and TOC reduced significantly compared to raw effluents by both coagulation-flocculation and fenton processes and meet the standards set by BDS-ECR except BOD and DO. After being treated the COD value reduced to 70 mg/L (86.56%) and 188 mg/L (63.985%) from its initial concentration by coagulation-flocculation and fenton process, respectively on the other hand TOC removal efficiency by coagulation-flocculation process was 97.8125%, significantly greater than fenton methods where removal efficiency was 63.9%. However, the BOD removal efficiency by both treatment processes was ~50% which was not satisfactory compared to local standard. Interestingly, the concentration of DO increased substantially by both coagulation-flocculation (1.2 to 4.4 mg/L) and fenton process (1.2 to 3.85 mg/L). In case of trace elements removal, the combination of coagulation-flocculation-water hyacinth and fenton-water hyacinth show promising results where the removal efficiency of coagulation-flocculation-water hyacinth and fenton-water hyacinth was 24%-76% and 17%-76.36%, respectively. Therefore, it can be concluded that coagulation-flocculation-water hyacinth combination is better than fenton-water hyacinth combination in terms of trace metals removal. Textile effluents treatment and management is considered as one of the most significant issues in Bangladesh herein based on the this study, combination of chemical and phytoremediation technologies could be a promising sustainable low cost alternative for Bangladesh's textile industrial sector.
Textile effluents contain complex characteristics with different physicochemical parameters and c... more Textile effluents contain complex characteristics with different physicochemical parameters and colorful dye. It is difficult to remove all types of pollutant using a specific treatment process. In this study adsorption filtration alone then Fenton process with sand-gravel mixed filtration and activated charcoal filtration was applied. Fenton process is very effective process for Chemical Oxygen Demand (COD) and Dissolve Organic Carbon (DOC) removal. And Activated carbon is a suitable adsorbent for dye removal. Physicochemical parameters like, COD, DOC, Total Dissolve Solid (TDS), Dissolve Oxygen (DO), Electric conductivity (EC), and pH was measured before and after the treatment process. After filtration by adsorbent filter all the parameter reduced than raw effluent Original Research Article Hossain et al.; CJAST, 39(28): 21-31, 2020; Article no.CJAST.60827 22 but when Fenton process with sand filtration and activated charcoal filtration was applied all the parameter drastically changed than before. DO level was increased after only adsorption filtration process, Fenton and normal sand filtration process, Fenton, and adsorbent filtration process as 1.8 mg/l< 5 mg/l < 6.19 mg/l < 6 mg/l, respectively. Maximum level of EC (61.33%), TDS (82.75%), BOD (92%), COD (80%), DOC (97.57%), and color (78.57%) was decrease after using Fenton process with Activated carbon filtration process than other treatment process, which was within Bangladesh standard value. This result represents the advantage of using Fenton process with adsorption filtration to treat textile effluent. Moreover, this process is easily operating, practical and environment friendly for using in industrial scale.
Groundwater is an essential and valuable natural source of drinking water. But sometime ground wa... more Groundwater is an essential and valuable natural source of drinking water. But sometime ground water contains different types of chemical or biological substance which make water unsuitable for consumption. Quality of the ground water varies in different location. The recent study emphasized on monitoring the present condition of groundwater in the coastal region of Noakhali. The study area covered 24 different locations of two large Upazila Subarnachar and Kabirhat of Noakhali District. Groundwater quality was examined by analyzing various physicochemical parameters and microbial parameters such as pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity, Total Hardness, Potassium, Sulphate, Chloride ions, Total Coliform, Fecal Coliform, and Total Bacterial Viable Count. These parameters were compared with the drinking water quality standards recommended by WHO and Bangladesh local standards. From the analysis, it was observed that pH, Sulphate, Potassium were within the acceptable limit according to WHO and Bangladesh standards. But maximum tube-wells water contains huge amount of TDS (6040 mg/l), Original Research Article Sarker et al.; JALSI, 23(3): 9-19, 2020; Article no. JALSI.56223 10 EC (1786µs/cm), Salinity (6.8%) and hardness (1050 mg/l), which is not safe for human health. From the correlation studies of the water quality parameters, relatively high positive correlation between some chemical parameters was found. And it signifies a common origin or progressive enrichment of both parameters. The analysis of biological parameters showed the presence of bacteria in many of the water samples. Maximum value of Total coliform found from the groundwater was TNTC and fecal coliform was 3×10 1 CFU/ml. According to WHO and Bangladesh standard the groundwater of this region is not suitable for drinking. So, some simple primary treatment is needed prior to use this water for drinking purposes and necessary steps should be taken for alternative safe source of drinking water in this region.
Textile effluents are highly colored for synthetic dyes, cause significant water pollution due to... more Textile effluents are highly colored for synthetic dyes, cause significant water pollution due to high pH, TDS, EC, BOD, and COD content, and are harmful to aquatic species. Among different treatment processes, biological treatment process is considered as a promising approach. In this investigation, a mixed aerobic bacterial consortium was used for the treatment of wastewater. In addition, the fenton process with a normal sand filter was used for treatment and compared with the biological method. The mean values of BOD, COD, TDS, EC, DO, and pH in the raw wastewater indicated that the effluent was highly contaminated according to Bangladesh standard (ECR, 1997). Both the biological treatment process and fenton process separately showed promising removal of pollution load. The aerobic mixed bacterial consortium reduced TDS (66.67%), EC (60%), BOD (91.67%), and COD (85.45%) and fenton process reduced TDS (74.71%), EC (55.11%), BOD (88.33%), and COD (83.63%) compared to the raw effluent bacterial consortium simultaneously degraded dyes and decolorized the wastewater from dark deep green to transparent. Color removal for the mixed aerobic bacterial process after 72 hours of aeration was 58.57% and for the fenton process with a normal sand filter was 80%. BOD and COD removal percentages for aerobic mixed bacterial consortium showed higher removal efficiency than the fenton process with a normal sand filter. Though 92 hours of aeration showed the maximum satisfactory result, aeration time could be reduced to 72 hours which also satisfied the Bangladeshi standard (ECR, 1997).
Noakhali Pourashava is an important municipality in southern Bangladesh, faces severe waterloggin... more Noakhali Pourashava is an important municipality in southern Bangladesh, faces severe waterlogging problems every year during the monsoon period. The present study aimed to investigate the major causes of waterlogging and its negative effects on life, from the viewpoint of people residing in different areas of Noakhali Pourashava, various government, non-government, development organizations as well as various stakeholders including experts. It has been found that Noakhali Pourashava experienced waterlogging during peak monsoon season in ward no. 1, 2, 4, 5, and 8. Most of the inhabitants/respondents of the Noakhali Pourashava claimed that lack of drainage facility; excessive rainfall; inadequate, low capacity and conventional drainage system; natural siltation; improper waste management; absence of proper inlets and outlets; and blockage and encroachment of existing drainage are responsible for waterlogging. It has ascertained that the water logging becomes a burden for the inhabit...
Journal of Multidisciplinary Applied Natural Science, 2021
Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was e... more Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was experimented to eliminate lead (Pb2+) from an aqueous solution following batch experiments. The functional groups of banana peel were identified by Fourier-transform infrared spectroscopy (FTIR). The adsorption mechanism was studied by the Langmuir and Freundlich adsorption isotherm model and determined the separation factor from the Langmuir adsorption isotherm. The adsorption of Pb2+ on dried banana peel had been studied at different adsorbent doses, pH, initial concentration of Pb, contact time, temperature, and agitation speed. After adsorption, Pb2+ was measured using atomic absorption spectroscopy (AAS). Maximum adsorption had taken place at pH 5 for adsorbent dose 45 g L-1. The optimum contact time and agitation speed was 30 minutes and 150 rpm, respectively for the initial Pb concentration of 100 ppm at 25°C. Both, Langmuir and Freundlich adsorption isotherm models shows the best ...
In the present investigation, coagulation-flocculation and fenton process in conjunction with phy... more In the present investigation, coagulation-flocculation and fenton process in conjunction with phytoremediation by water hyacinth (Eicchornia crassipes) were applied to treat the most frequently occurred contaminants in textile wastewater. The mean values of EC, TDS, turbidity, pH, DO, BOD, COD and TOC in the raw effluents were 2300 μSCm-1, 1260 mgL-1, 48.28 FTU, 10.5, 1.2 mgL-1, 265 mgL-1, 522 mgL-1 and 12.8 mgL-1, respectively whereas the average concentration of Cr, Pb, Mg, Cu, Ni and Zn was 0.86, 1.21, 10.97, 0.47, 2.85 and 0.52 mg/L, correspondingly which evidently indicated that the effluents were highly contaminated compared to Bangladeshi standard. The results demonstrated that the values of EC, TDS, turbidity, pH, BOD, COD and TOC reduced significantly compared to raw effluents by both coagulation-flocculation and fenton processes and meet the standards set by BDS-ECR except BOD and DO. After being treated the COD value reduced to 70 mg/L (86.56%) and 188 mg/L (63.985%) from...
Present Environment and Sustainable Development, 2020
Untreated wastewater disposal from industries has been a crucial environmental issue for developi... more Untreated wastewater disposal from industries has been a crucial environmental issue for developing countries like Bangladesh. The current study aims to investigate the status of Effluent Treatment Plant (ETP) and the quality of effluents in the Noakhali industrial area, Bangladesh. Total 10 industries were surveyed and the ETP status showed that about 30% of industries do not have ETP facilities and only 30% of industries use their ETP for the treatment of the effluents where the rest of the industry’s ETPs were under construction or exit but not used. Effluent samples were collected from seven locations near the discharge points of various industries. All the physicochemical parameters were determined using standard analytical procedures and analyzed the values comparing with the guideline standard by the Department of Environment (DoE), Bangladesh. The average values of electric conductivity (EC) have exceeded the tolerable limit in maximum effluent samples. On the contrary, the ...
Journal of Applied Life Sciences International, 2020
Groundwater is an essential and valuable natural source of drinking water. But sometime ground wa... more Groundwater is an essential and valuable natural source of drinking water. But sometime ground water contains different types of chemical or biological substance which make water unsuitable for consumption. Quality of the ground water varies in different location. The recent study emphasized on monitoring the present condition of groundwater in the coastal region of Noakhali. The study area covered 24 different locations of two large Upazila Subarnachar and Kabirhat of Noakhali District. Groundwater quality was examined by analyzing various physicochemical parameters and microbial parameters such as pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity, Total Hardness, Potassium, Sulphate, Chloride ions, Total Coliform, Fecal Coliform, and Total Bacterial Viable Count. These parameters were compared with the drinking water quality standards recommended by WHO and Bangladesh local standards. From the analysis, it was observed that pH, Sulphate, Potassium were withi...
Current Journal of Applied Science and Technology, 2020
Textile effluent contains dye and harmful chemicals which are difficult to remove. This study was... more Textile effluent contains dye and harmful chemicals which are difficult to remove. This study was conducted to find out the cost effective and efficient textile effluent treatment process. In this regard, coagulation-flocculation and Fenton treatment process were applied in which pH, Dissolve Oxygen, TOC (Total Organic Carbon), COD (Chemical Oxygen Demand), TDS (Total Dissolve Solid) and EC (Electro-conductivity) were analyzed before and after the treatment. Conventional Jar test was used for coagulation and flocculation process where chemical coagulants (FeSO4 and Ca(OH)2) were added to different doses. On the other hand, Hydroxyl (OH.) radical, a byproduct of reaction between hydrogen peroxide (H2O2) and ferrous sulphate (FeSO4) was used in Fenton treatment processas a strong oxidant capable of oxidizing various organic compounds. In coagulation-flocculation process the maximum reduction of pH (6.3-6.8), TDS (400 mg/l), EC (1110 µs/cm), COD (86.56%) and TOC (97.81%) was found afte...
Surface water is usually turbid to some extent. Coagulation and flocculation are commonly used me... more Surface water is usually turbid to some extent. Coagulation and flocculation are commonly used methods for water turbidity removal, and are usually conducted by adding chemicals such as salts of aluminium and iron and polyelectrolytes. The main objective of this study was to reduce turbidity the water of the Bangshi River with natural coagulant. Tamarindus indica, Litchi chinensis, Dolichos lablab seeds powder were used as natural coagulant. pH, conductivity, total dissolved solids and COD was also measured. Jar test was used for this purpose. Initial turbidity was 90.3 NTU. Polyaluminium chloride (PAC) was used as coagulant aids respectively. The turbidity reduction efficiency of Litchi chinensis for 50, 75 and 100 mg/l dose are 95.19%, 96.61% and 94.51%. The turbidity reduction efficiency of Tamarindus indica for 50, 75 and 100mg/l dose are 80.61%, 97.50% and 87.50%. The turbidity reduction efficiency of Dolichos lablab for 50, 75 and 100mg/l are 86.01%, 87.70% and 84.77%. Maximum...
Current Journal of Applied Science and Technology, 2020
Textile effluents contain complex characteristics with different physicochemical parameters and c... more Textile effluents contain complex characteristics with different physicochemical parameters and colorful dye. It is difficult to remove all types of pollutant using a specific treatment process. In this study adsorption filtration alone then Fenton process with sand-gravel mixed filtration and activated charcoal filtration was applied. Fenton process is very effective process for Chemical Oxygen Demand (COD) and Dissolve Organic Carbon (DOC) removal. And Activated carbon is a suitable adsorbent for dye removal. Physicochemical parameters like, COD, DOC, Total Dissolve Solid (TDS), Dissolve Oxygen (DO), Electric conductivity (EC), and pH was measured before and after the treatment process. After filtration by adsorbent filter all the parameter reduced than raw effluent Original Research Article Hossain et al.; CJAST, 39(28): 21-31, 2020; Article no.CJAST.60827 22 but when Fenton process with sand filtration and activated charcoal filtration was applied all the parameter drastically c...
Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was e... more Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was experimented to eliminate lead (Pb2+) from an aqueous solution following batch experiments. The functional groups of banana peel were identified by Fourier-transform infrared spectroscopy (FTIR). The adsorption mechanism was studied by the Langmuir and Freundlich adsorption isotherm model and determined the separation factor from the Langmuir adsorption isotherm. The adsorption of Pb2+ on dried banana peel had been studied at different adsorbent doses, pH, initial concentration of Pb, contact time, temperature, and agitation speed. After adsorption, Pb2+ was measured using atomic absorption spectroscopy (AAS). Maximum adsorption had taken place at pH 5 for adsorbent dose 45 g L-1. The optimum contact time and agitation speed was 30 minutes and 150 rpm, respectively for the initial Pb concentration of 100 ppm at 25°C. Both, Langmuir and Freundlich adsorption isotherm models shows the best ...
The Dhaleswari river is considered as one of the most important rivers of Bangladesh due to its g... more The Dhaleswari river is considered as one of the most important rivers of Bangladesh due to its geographical location and ecological services. The present study attempts to evaluate the degree of heavy metal pollution, contamination, and accumulative behavior in the sediment of the Dhaleswari river. The sediment samples were collected from fifteen different locations of the Dhaleswari river. Heavy metals were analyzed using the Flame Atomic Spectrophotometer (FAAS). The mean concentrations of Zn, Cu, Cr, Pb and Cd were 131.9, 48.89, 43.16, 33.23 and 0.37 mgkg-1, respectively. According to the United States Environmental Protection Agency (USEPA) Sediment Quality Guideline, the sediment of most of the locations were not polluted for Pb and Cd. But S-11 location for Cd (0.8 mg kg-1) was highly polluted. For Cr, Cu and Zn, maximum locations were moderately polluted. Although the geo-accumulation index (Igeo) values of Dhaleswari river sediments showed almost no severe contamination fo...
Abstract: The present study was conducted to assess the efficacy of powder extracted from mature-... more Abstract: The present study was conducted to assess the efficacy of powder extracted from mature-dried Tamarindus indica and Litchi chinensis seeds for the turbidity reduction of polluted river water. Efficiency of Tamarindus indica and Litchi chinensis in removal of turbidity was compared with a synthetic coagulant Polyaluminiumchloride(PAC). The jar test experiment was performed to treat sample water using seed extracts along with PAC in laboratory condition. Polyacrylamide (PAM) was used as a model coagulant to aid the coagulation process. Water samples were analyzed before and after
Noakhali Pourashava is an important municipality in southern Bangladesh, faces severe waterloggin... more Noakhali Pourashava is an important municipality in southern Bangladesh, faces severe waterlogging problems every year during the monsoon period. The present study aimed to investigate the major causes of waterlogging and its negative effects on life, from the viewpoint of people residing in different areas of Noakhali Pourashava, various government, non-government, development organizations as well as various stakeholders including experts. It has been found that Noakhali Pourashava experienced waterlogging during peak monsoon season in ward no. 1, 2, 4, 5, and 8. Most of the inhabitants/respondents of the Noakhali Pourashava claimed that lack of drainage facility; excessive rainfall; inadequate, low capacity and conventional drainage system; natural siltation; improper waste management; absence of proper inlets and outlets; and blockage and encroachment of existing drainage are responsible for waterlogging. It has ascertained that the water logging becomes a burden for the inhabitants of the Pourashava and creating adverse effects on livelihood, society, infrastructure, economy and environment. Other notable adverse effects of waterlogging are disruption of traffic movement and normal life, structures and infrastructure damage and loss of income potentials with a lot of sufferings. The stagnant water acts as a breeding site for the vectors of various diseases and becomes a health hazard to people residing in the waterlogged area. The current study suggests that close coordination among Pourashava authorities, local government agencies and a strong collaboration between public and private sectors as well as local people participation are essential for solving the waterlogging problem effectively and sustainably.
Present Environment and Sustainable Development, 2020
Untreated wastewater disposal from industries has been a crucial environmental issue for developi... more Untreated wastewater disposal from industries has been a crucial environmental issue for developing countries like Bangladesh. The current study aims to investigate the status of Effluent Treatment Plant (ETP) and the quality of effluents in the Noakhali industrial area, Bangladesh. Total 10 industries were surveyed and the ETP status showed that about 30% of industries do not have ETP facilities and only 30% of industries use their ETP for the treatment of the effluents where the rest of the industry's ETPs were under construction or exist but not used. Effluent samples were collected from seven locations near the discharge points of various industries. All the physicochemical parameters were determined using standard analytical procedures and analyzed the values comparing with the guideline standard by the Department of Environment (DoE), Bangladesh. The average values of electric conductivity (EC) have exceeded the tolerable limit in maximum effluent samples. On the contrary, the temperature, pH, and total dissolved solids (TDS) values were within the standard limit for all of the collected effluent samples. The chloride concentration of the three effluent samples surpassed the limit. The biological oxygen demand (BOD) and chemical oxygen demand (COD) limit were exceeded for the effluent sampling sites S-6 and S-7 collected near the food and beverage industry. Besides, the maximum dissolved oxygen (DO) values of the effluents were below the standard which indicates poor water quality. Environmental nuisance is producing in Noakhali industrial area as maximum industries have not enough wastewater treatment facilities. Present study demonstrated that it is obvious Md. Shiblur Rahaman, Fozia Momotaz, Afrida Nurain, Protima Sarker, Sahoko Ichihara 152 to operate the ETP regularly for improving the quality of effluents to save our native environment from the harmful effects of wastewater.
In the present investigation, coagulation-flocculation and fenton process in conjunction with phy... more In the present investigation, coagulation-flocculation and fenton process in conjunction with phytoremediation by water hyacinth (Eicchornia crassipes) were applied to treat the most frequently occurred contaminants in textile wastewater. The mean values of EC, TDS, turbidity, pH, DO, BOD, COD and TOC in the raw effluents were 2300 µSCm-1 , 1260 mgL-1 , 48.28 FTU, 10.5, 1.2 mgL-1 , 265 mgL-1 , 522 mgL-1 and 12.8 mgL-1 , respectively whereas the average concentration of Cr, Pb, Mg, Cu, Ni and Zn was 0.86, 1.21, 10.97, 0.47, 2.85 and 0.52 mg/L, correspondingly which evidently indicated that the effluents were highly contaminated compared to Bangladeshi standard. The results demonstrated that the values of EC, TDS, turbidity, pH, BOD, COD and TOC reduced significantly compared to raw effluents by both coagulation-flocculation and fenton processes and meet the standards set by BDS-ECR except BOD and DO. After being treated the COD value reduced to 70 mg/L (86.56%) and 188 mg/L (63.985%) from its initial concentration by coagulation-flocculation and fenton process, respectively on the other hand TOC removal efficiency by coagulation-flocculation process was 97.8125%, significantly greater than fenton methods where removal efficiency was 63.9%. However, the BOD removal efficiency by both treatment processes was ~50% which was not satisfactory compared to local standard. Interestingly, the concentration of DO increased substantially by both coagulation-flocculation (1.2 to 4.4 mg/L) and fenton process (1.2 to 3.85 mg/L). In case of trace elements removal, the combination of coagulation-flocculation-water hyacinth and fenton-water hyacinth show promising results where the removal efficiency of coagulation-flocculation-water hyacinth and fenton-water hyacinth was 24%-76% and 17%-76.36%, respectively. Therefore, it can be concluded that coagulation-flocculation-water hyacinth combination is better than fenton-water hyacinth combination in terms of trace metals removal. Textile effluents treatment and management is considered as one of the most significant issues in Bangladesh herein based on the this study, combination of chemical and phytoremediation technologies could be a promising sustainable low cost alternative for Bangladesh's textile industrial sector.
Textile effluents contain complex characteristics with different physicochemical parameters and c... more Textile effluents contain complex characteristics with different physicochemical parameters and colorful dye. It is difficult to remove all types of pollutant using a specific treatment process. In this study adsorption filtration alone then Fenton process with sand-gravel mixed filtration and activated charcoal filtration was applied. Fenton process is very effective process for Chemical Oxygen Demand (COD) and Dissolve Organic Carbon (DOC) removal. And Activated carbon is a suitable adsorbent for dye removal. Physicochemical parameters like, COD, DOC, Total Dissolve Solid (TDS), Dissolve Oxygen (DO), Electric conductivity (EC), and pH was measured before and after the treatment process. After filtration by adsorbent filter all the parameter reduced than raw effluent Original Research Article Hossain et al.; CJAST, 39(28): 21-31, 2020; Article no.CJAST.60827 22 but when Fenton process with sand filtration and activated charcoal filtration was applied all the parameter drastically changed than before. DO level was increased after only adsorption filtration process, Fenton and normal sand filtration process, Fenton, and adsorbent filtration process as 1.8 mg/l< 5 mg/l < 6.19 mg/l < 6 mg/l, respectively. Maximum level of EC (61.33%), TDS (82.75%), BOD (92%), COD (80%), DOC (97.57%), and color (78.57%) was decrease after using Fenton process with Activated carbon filtration process than other treatment process, which was within Bangladesh standard value. This result represents the advantage of using Fenton process with adsorption filtration to treat textile effluent. Moreover, this process is easily operating, practical and environment friendly for using in industrial scale.
Groundwater is an essential and valuable natural source of drinking water. But sometime ground wa... more Groundwater is an essential and valuable natural source of drinking water. But sometime ground water contains different types of chemical or biological substance which make water unsuitable for consumption. Quality of the ground water varies in different location. The recent study emphasized on monitoring the present condition of groundwater in the coastal region of Noakhali. The study area covered 24 different locations of two large Upazila Subarnachar and Kabirhat of Noakhali District. Groundwater quality was examined by analyzing various physicochemical parameters and microbial parameters such as pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity, Total Hardness, Potassium, Sulphate, Chloride ions, Total Coliform, Fecal Coliform, and Total Bacterial Viable Count. These parameters were compared with the drinking water quality standards recommended by WHO and Bangladesh local standards. From the analysis, it was observed that pH, Sulphate, Potassium were within the acceptable limit according to WHO and Bangladesh standards. But maximum tube-wells water contains huge amount of TDS (6040 mg/l), Original Research Article Sarker et al.; JALSI, 23(3): 9-19, 2020; Article no. JALSI.56223 10 EC (1786µs/cm), Salinity (6.8%) and hardness (1050 mg/l), which is not safe for human health. From the correlation studies of the water quality parameters, relatively high positive correlation between some chemical parameters was found. And it signifies a common origin or progressive enrichment of both parameters. The analysis of biological parameters showed the presence of bacteria in many of the water samples. Maximum value of Total coliform found from the groundwater was TNTC and fecal coliform was 3×10 1 CFU/ml. According to WHO and Bangladesh standard the groundwater of this region is not suitable for drinking. So, some simple primary treatment is needed prior to use this water for drinking purposes and necessary steps should be taken for alternative safe source of drinking water in this region.
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