The binary and ternary adsorptions of Pb (II), methyl orange (MO) and brilliant blue (BB) on engi... more The binary and ternary adsorptions of Pb (II), methyl orange (MO) and brilliant blue (BB) on engineered biochar (Fe2O3-BC) nano-composite using pyrolysis and microwave activation were investigated in this work. Batch experiments were conducted to investigate the capacity of Fe2O3BC to remove MO, Pb and BB in binary and ternary aqueous solutions. MO removal was higher in MO-Pb binary solution than in ternary MO solution. A large amount of adsorbent dosage, high concentration and longer time were witnessed to achieve maximum removals in ternary solutions as compared to binary solutions. The Langmuir plots indicated that the isotherm can be used to describe sorption studies of both MO dye and Pb2+, while Temkin isotherm was not in agreement with the results. The closeness of R2 value to 1 indicated that the data obtained fits Langmuir Isotherm model of monolayer adsorption kinetics. It was concluded that the Fe2O3-BC nano-composite has a series of distinct homogeneous sites available f...
Water purification is slowly becoming a problem worldwide due to population growth. Lack of prope... more Water purification is slowly becoming a problem worldwide due to population growth. Lack of proper wastewater disposal from domestic and industrial sources has escalated water pollution in developing countries. Continuous pollution of water sources has made water purification for domestic supplies very expensive. Modern and cost-effective ways of water purification are urgently needed. One of the modern emerging technologies is adsorption using nano-materials. The aim of the study was to prepare an engineered iron oxide-biochar (Fe2O3-BC), a nanocomposite using pyrolysis and microwave activation. The efficiency of the nano-composite was evaluated in the removal of the heavy metal lead (Pb) and the dye methyl orange (MO) in aqueous solutions. Infrared spectroscopy was used to identify the functional groups present in the synthesized biochars before and after adsorption. The adsorption properties of the synthesised Original Research Article Shumba et al.; JMSRR, 4(3): 1-12, 2019; Arti...
Water purification is slowly becoming a problem worldwide due to population growth. Lack of prope... more Water purification is slowly becoming a problem worldwide due to population growth. Lack of proper wastewater disposal from domestic and industrial sources has escalated water pollution in developing countries. Continuous pollution of water sources has made water purification for domestic supplies very expensive. Modern and cost-effective ways of water purification are urgently needed. One of the modern emerging technologies is adsorption using nano-materials. The aim of the study was to prepare an engineered iron oxide-biochar (Fe 2 O 3-BC), a nano-composite using pyrolysis and microwave activation. The efficiency of the nano-composite was evaluated in the removal of the heavy metal lead (Pb) and the dye methyl orange (MO) in aqueous solutions. Infrared spectroscopy was used to identify the functional groups present in the synthesized biochars before and after adsorption. The adsorption properties of the synthesised Original Research Article Shumba et al.; JMSRR, 4(3): 1-12, 2019; Article no.JMSRR.52734 2 Fe 2 O 3-BC and biochar (BC) were determined by application in lead metal and methyl orange aqueous solutions on known concentrations. FAAS and UV/VIS Spectrophotometry were used for Lead and Methyl Orange concentrations measurements respectively. Batch adsorption experiments were conducted to investigate the capacity of Fe 2 O 3-BC and BC to remove MO and Pb in aqueous solutions. A dose of 50 mg Fe 2 O 3-BC had the highest percentage MO removal of 89.81% at pH 2 while 50 mg of BC had a highest of 11.55% at pH 12. A dosage of 100 mg of Fe 2 O 3-BC had 100% MO removal and 250 mg BC achieved a maximum of 30.61% removal in 30 minutes. Maximum MO removal concentrations were 70 mg/L and 55 mg/L respectively for Fe 2 O 3-BC and BC adsorbents. Both Fe 2 O 3-BC and BC had Pb 2+ removal of 97% in 30 minutes. A dose of 65 mg for both Fe 2 O 3-BC and BC adsorbents had 100% removal of Pb 2+. The adsorption studies of both MO dye and Pb 2+ on Fe 2 O 3-BC nano-composite fit the Langmuir isotherm (R 2 value of 0.999) and Temkin isotherm (R 2 value of 0.919). The Fe 2 O 3-BC nano-composite adsorbs Pb and MO dye better than biochar. The Fe 2 O 3-BC nano-composite could be a good adsorbent for other cations and anions. More work need to be done in order to investigate the adsorption potential of other cations and anions using Fe 2 O 3-BC nano-composite.
Plectranthus esculentus is a common tuberous, perennial plant widely distributed in Rusape distri... more Plectranthus esculentus is a common tuberous, perennial plant widely distributed in Rusape district of Zimbabwe and other areas of eastern and central and southern Africa. Phytochemicals were extracted from Plectranthus esculentus tubers using the matrix solid-phase dispersion extraction technique with ethanol as the extraction solvent. The extracts were first screened for flavonoids, reducing sugars, saponins, glycosides, terpernoids, alkaloids, and tannins using well known phytochemical screening procedures. Plectranthus esculentus tuber extracts were found to contain for flavonoids, reducing sugars, saponins, glycosides, terpernoids, alkaloids, and tannins. Total phenolic content for the tuber extracts was found to be 11.03 ±0.05mgGAE/g fresh weight. The results revealed the presence of medicinally important phytochemicals in the tubers. The presence of these phytochemicals helps to explain the importance of Plectranthus esculentus. The tubers have potential uses in food preservation and natural medicine. There is a need for continued cultivation, preservation and more research on Plectranthus esculentus in Zimbabwe and abroad.
During manufacturing of any product, care must be taken to produce a quality product. This
applie... more During manufacturing of any product, care must be taken to produce a quality product. This applies to biodiesel plants in Zimbabwe to manufacture a fuel which is up to world standards for each and every batch produced. The following results were obtained, IBP of 294.5oC, FBP of 375.5oC, kinematic viscosity at 40oC of 4.55 mm2/s, conductivity of 636 pS/m, calculated cetane index of 47.71, water content of 0.1% v/v, and density of 0.8809 g/cm3 on analysis of the jatropha biodiesel engine fuel. The distillation profile is of paramount importance as far as the quality of a fuel is concerned.
During manufacturing of any product, care must be taken to produce a quality product. This
applie... more During manufacturing of any product, care must be taken to produce a quality product. This applies to biodiesel plants in Zimbabwe to manufacture a fuel which is up to world standards for each and every batch produced. The following results were obtained, IBP of 294.5oC, FBP of 375.5oC, kinematic viscosity at 40oC of 4.55 mm2/s, conductivity of 636 pS/m, calculated cetane index of 47.71, water content of 0.1% v/v, and density of 0.8809 g/cm3 on analysis of the jatropha biodiesel engine fuel. The distillation profile is of paramount importance as far as the quality of a fuel is concerned.
The binary and ternary adsorptions of Pb (II), methyl orange (MO) and brilliant blue (BB) on engi... more The binary and ternary adsorptions of Pb (II), methyl orange (MO) and brilliant blue (BB) on engineered biochar (Fe2O3-BC) nano-composite using pyrolysis and microwave activation were investigated in this work. Batch experiments were conducted to investigate the capacity of Fe2O3BC to remove MO, Pb and BB in binary and ternary aqueous solutions. MO removal was higher in MO-Pb binary solution than in ternary MO solution. A large amount of adsorbent dosage, high concentration and longer time were witnessed to achieve maximum removals in ternary solutions as compared to binary solutions. The Langmuir plots indicated that the isotherm can be used to describe sorption studies of both MO dye and Pb2+, while Temkin isotherm was not in agreement with the results. The closeness of R2 value to 1 indicated that the data obtained fits Langmuir Isotherm model of monolayer adsorption kinetics. It was concluded that the Fe2O3-BC nano-composite has a series of distinct homogeneous sites available f...
Water purification is slowly becoming a problem worldwide due to population growth. Lack of prope... more Water purification is slowly becoming a problem worldwide due to population growth. Lack of proper wastewater disposal from domestic and industrial sources has escalated water pollution in developing countries. Continuous pollution of water sources has made water purification for domestic supplies very expensive. Modern and cost-effective ways of water purification are urgently needed. One of the modern emerging technologies is adsorption using nano-materials. The aim of the study was to prepare an engineered iron oxide-biochar (Fe2O3-BC), a nanocomposite using pyrolysis and microwave activation. The efficiency of the nano-composite was evaluated in the removal of the heavy metal lead (Pb) and the dye methyl orange (MO) in aqueous solutions. Infrared spectroscopy was used to identify the functional groups present in the synthesized biochars before and after adsorption. The adsorption properties of the synthesised Original Research Article Shumba et al.; JMSRR, 4(3): 1-12, 2019; Arti...
Water purification is slowly becoming a problem worldwide due to population growth. Lack of prope... more Water purification is slowly becoming a problem worldwide due to population growth. Lack of proper wastewater disposal from domestic and industrial sources has escalated water pollution in developing countries. Continuous pollution of water sources has made water purification for domestic supplies very expensive. Modern and cost-effective ways of water purification are urgently needed. One of the modern emerging technologies is adsorption using nano-materials. The aim of the study was to prepare an engineered iron oxide-biochar (Fe 2 O 3-BC), a nano-composite using pyrolysis and microwave activation. The efficiency of the nano-composite was evaluated in the removal of the heavy metal lead (Pb) and the dye methyl orange (MO) in aqueous solutions. Infrared spectroscopy was used to identify the functional groups present in the synthesized biochars before and after adsorption. The adsorption properties of the synthesised Original Research Article Shumba et al.; JMSRR, 4(3): 1-12, 2019; Article no.JMSRR.52734 2 Fe 2 O 3-BC and biochar (BC) were determined by application in lead metal and methyl orange aqueous solutions on known concentrations. FAAS and UV/VIS Spectrophotometry were used for Lead and Methyl Orange concentrations measurements respectively. Batch adsorption experiments were conducted to investigate the capacity of Fe 2 O 3-BC and BC to remove MO and Pb in aqueous solutions. A dose of 50 mg Fe 2 O 3-BC had the highest percentage MO removal of 89.81% at pH 2 while 50 mg of BC had a highest of 11.55% at pH 12. A dosage of 100 mg of Fe 2 O 3-BC had 100% MO removal and 250 mg BC achieved a maximum of 30.61% removal in 30 minutes. Maximum MO removal concentrations were 70 mg/L and 55 mg/L respectively for Fe 2 O 3-BC and BC adsorbents. Both Fe 2 O 3-BC and BC had Pb 2+ removal of 97% in 30 minutes. A dose of 65 mg for both Fe 2 O 3-BC and BC adsorbents had 100% removal of Pb 2+. The adsorption studies of both MO dye and Pb 2+ on Fe 2 O 3-BC nano-composite fit the Langmuir isotherm (R 2 value of 0.999) and Temkin isotherm (R 2 value of 0.919). The Fe 2 O 3-BC nano-composite adsorbs Pb and MO dye better than biochar. The Fe 2 O 3-BC nano-composite could be a good adsorbent for other cations and anions. More work need to be done in order to investigate the adsorption potential of other cations and anions using Fe 2 O 3-BC nano-composite.
Plectranthus esculentus is a common tuberous, perennial plant widely distributed in Rusape distri... more Plectranthus esculentus is a common tuberous, perennial plant widely distributed in Rusape district of Zimbabwe and other areas of eastern and central and southern Africa. Phytochemicals were extracted from Plectranthus esculentus tubers using the matrix solid-phase dispersion extraction technique with ethanol as the extraction solvent. The extracts were first screened for flavonoids, reducing sugars, saponins, glycosides, terpernoids, alkaloids, and tannins using well known phytochemical screening procedures. Plectranthus esculentus tuber extracts were found to contain for flavonoids, reducing sugars, saponins, glycosides, terpernoids, alkaloids, and tannins. Total phenolic content for the tuber extracts was found to be 11.03 ±0.05mgGAE/g fresh weight. The results revealed the presence of medicinally important phytochemicals in the tubers. The presence of these phytochemicals helps to explain the importance of Plectranthus esculentus. The tubers have potential uses in food preservation and natural medicine. There is a need for continued cultivation, preservation and more research on Plectranthus esculentus in Zimbabwe and abroad.
During manufacturing of any product, care must be taken to produce a quality product. This
applie... more During manufacturing of any product, care must be taken to produce a quality product. This applies to biodiesel plants in Zimbabwe to manufacture a fuel which is up to world standards for each and every batch produced. The following results were obtained, IBP of 294.5oC, FBP of 375.5oC, kinematic viscosity at 40oC of 4.55 mm2/s, conductivity of 636 pS/m, calculated cetane index of 47.71, water content of 0.1% v/v, and density of 0.8809 g/cm3 on analysis of the jatropha biodiesel engine fuel. The distillation profile is of paramount importance as far as the quality of a fuel is concerned.
During manufacturing of any product, care must be taken to produce a quality product. This
applie... more During manufacturing of any product, care must be taken to produce a quality product. This applies to biodiesel plants in Zimbabwe to manufacture a fuel which is up to world standards for each and every batch produced. The following results were obtained, IBP of 294.5oC, FBP of 375.5oC, kinematic viscosity at 40oC of 4.55 mm2/s, conductivity of 636 pS/m, calculated cetane index of 47.71, water content of 0.1% v/v, and density of 0.8809 g/cm3 on analysis of the jatropha biodiesel engine fuel. The distillation profile is of paramount importance as far as the quality of a fuel is concerned.
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applies to biodiesel plants in Zimbabwe to manufacture a fuel which is up to world standards for
each and every batch produced. The following results were obtained, IBP of 294.5oC, FBP of
375.5oC, kinematic viscosity at 40oC of 4.55 mm2/s, conductivity of 636 pS/m, calculated cetane
index of 47.71, water content of 0.1% v/v, and density of 0.8809 g/cm3 on analysis of the
jatropha biodiesel engine fuel. The distillation profile is of paramount importance as far as the
quality of a fuel is concerned.
applies to biodiesel plants in Zimbabwe to manufacture a fuel which is up to world standards for
each and every batch produced. The following results were obtained, IBP of 294.5oC, FBP of
375.5oC, kinematic viscosity at 40oC of 4.55 mm2/s, conductivity of 636 pS/m, calculated cetane
index of 47.71, water content of 0.1% v/v, and density of 0.8809 g/cm3 on analysis of the
jatropha biodiesel engine fuel. The distillation profile is of paramount importance as far as the
quality of a fuel is concerned.
applies to biodiesel plants in Zimbabwe to manufacture a fuel which is up to world standards for
each and every batch produced. The following results were obtained, IBP of 294.5oC, FBP of
375.5oC, kinematic viscosity at 40oC of 4.55 mm2/s, conductivity of 636 pS/m, calculated cetane
index of 47.71, water content of 0.1% v/v, and density of 0.8809 g/cm3 on analysis of the
jatropha biodiesel engine fuel. The distillation profile is of paramount importance as far as the
quality of a fuel is concerned.
applies to biodiesel plants in Zimbabwe to manufacture a fuel which is up to world standards for
each and every batch produced. The following results were obtained, IBP of 294.5oC, FBP of
375.5oC, kinematic viscosity at 40oC of 4.55 mm2/s, conductivity of 636 pS/m, calculated cetane
index of 47.71, water content of 0.1% v/v, and density of 0.8809 g/cm3 on analysis of the
jatropha biodiesel engine fuel. The distillation profile is of paramount importance as far as the
quality of a fuel is concerned.