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Md. Aminur Rahman

This document discusses a study that analyzed heavy metal content in hair/wool samples from cows, goats, buffaloes, and sheep as well as liming agents like sodium sulfide and lime. Samples were acid digested and analyzed using atomic absorption spectroscopy to quantify arsenic, cadmium, lead, and manganese. The study found that these heavy metals accumulate in hair/wool due to sulfur groups and are then released into wastewater during the hair dissolving liming process in tanneries. Graphs show the quantified levels of different heavy metals found in the hair/wool, liming agents, and resulting liming wastewater. The study evaluates heavy metal discharge from tanneries during hair

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@ 15ft Asian Chemical Congress 2016 Boehm titration. The adsorption of iodine from the aqueous solution indicates the degree of relative activation Equilibrium adsorption isotherm for removal of phenolfrom aqueous solution was investigated. The maximum adsorption cryacity was determined from the liquid phase batch adsorption experiments.The effect of experimental parameters including solution pH, agitatiol time, particle size, temperature and initial concentration was alsoinvestigated. The equilibrium data was analyzedusing Langmuir, Frendlich and Redlich Peterson adsorption model to describe the adsorption isotherm.and estimate the adsorption isotherm parameters. The study indicates tk potential use of the adsorbent for removal ofphenol from the aqueous solution. EN-OP-U; HAIR DISSOLVING LIMING IN TANNIERIES ENHANCES HEAVY METALS TO ENVIRONMENT NiI Ratan Mondalr, Md. Abul Hasheml', Md. Shahruk Nur-A-Tomall, Md. Aminur Rahman2 t Department of Leather Engineering, Khulna University of Engineering & Technology (KUEI). Khulna-9 2 0 3, B angladesh 2 Department of Public Heakh Engineering, Zonal Laboratory, Khulna, Bangladesh E-mail: mahashem@mail.kuet.ac.bd, mahashem96@yahoo.com ln tannery,liming is the first and indispensible chemical operation where conventionallyhide/ is treated with sodium sulfide (NazS) and lime (CaO) to dissolve keratins (hair/wooll epidermis),non-structural proteins and to prepare for the next operations.Due to haviE sulftrydryl CSH) group in hair/wool; it acts as a good accumulator of heavy metals.In hai dissolving liming, heavy metals content of hair/wool release into wastewater. In this stu discharging oftreavy metals wasevaluatedfromthe tanneries especially in hair dissolving limi Samplei were analyzed fromi) hair/wool of cow, goat, buffalo and sheep,ii) conventional limi agents (NazS and CaO) and iii) liming wastewater of cow, goat, buffalo and sheep. Samples were acid digeste d; analyzed by atomic absorption spectroscopy for the quantification of arsenic (As[ cadmium (Cd), lead (Pb) and manganese (Mn). (a) +-Buffalo --1*- CaO +Sheep -4-Goat -rF- NarS *'?**'cow -'*As Pb Mn Heavy metals Figure 1: Heavy metals content in (a) hairiwool and (b) ---e-Sheep -<FGottl -{-Goat .+Buffalo As Pb Mn Heavy metals liming agents (b) liming wastewater 150 135 120 j' 105 3go Ezs Eso Ecsg Eso 15 0 I ros o geo 37sd E60 ElsE Eeo 15 0 l.{x34{

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  • 1. @ 15ft Asian Chemical Congress 2016 Boehm titration. The adsorption of iodine from the aqueous solution indicates the degree of relative activation Equilibrium adsorption isotherm for removal of phenolfrom aqueous solution was investigated. The maximum adsorption cryacity was determined from the liquid phase batch adsorption experiments.The effect of experimental parameters including solution pH, agitatiol time, particle size, temperature and initial concentration was alsoinvestigated. The equilibrium data was analyzedusing Langmuir, Frendlich and Redlich Peterson adsorption model to describe the adsorption isotherm.and estimate the adsorption isotherm parameters. The study indicates tk potential use of the adsorbent for removal ofphenol from the aqueous solution. EN-OP-U; HAIR DISSOLVING LIMING IN TANNIERIES ENHANCES HEAVY METALS TO ENVIRONMENT NiI Ratan Mondalr, Md. Abul Hasheml', Md. Shahruk Nur-A-Tomall, Md. Aminur Rahman2 t Department of Leather Engineering, Khulna University of Engineering & Technology (KUEI). Khulna-9 2 0 3, B angladesh 2 Department of Public Heakh Engineering, Zonal Laboratory, Khulna, Bangladesh E-mail: mahashem@mail.kuet.ac.bd, mahashem96@yahoo.com ln tannery,liming is the first and indispensible chemical operation where conventionallyhide/ is treated with sodium sulfide (NazS) and lime (CaO) to dissolve keratins (hair/wooll epidermis),non-structural proteins and to prepare for the next operations.Due to haviE sulftrydryl CSH) group in hair/wool; it acts as a good accumulator of heavy metals.In hai dissolving liming, heavy metals content of hair/wool release into wastewater. In this stu discharging oftreavy metals wasevaluatedfromthe tanneries especially in hair dissolving limi Samplei were analyzed fromi) hair/wool of cow, goat, buffalo and sheep,ii) conventional limi agents (NazS and CaO) and iii) liming wastewater of cow, goat, buffalo and sheep. Samples were acid digeste d; analyzed by atomic absorption spectroscopy for the quantification of arsenic (As[ cadmium (Cd), lead (Pb) and manganese (Mn). (a) +-Buffalo --1*- CaO +Sheep -4-Goat -rF- NarS *'?**'cow -'*As Pb Mn Heavy metals Figure 1: Heavy metals content in (a) hairiwool and (b) ---e-Sheep -<FGottl -{-Goat .+Buffalo As Pb Mn Heavy metals liming agents (b) liming wastewater 150 135 120 j' 105 3go Ezs Eso Ecsg Eso 15 0 I ros o geo 37sd E60 ElsE Eeo 15 0 l.{x34{