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Remediation of Lead Contaminated Gypsum Sludge
Characterization of industrial waste materials and by-products is a crucial step in their assessment for reuse or for their safe disposal in environmental friendly and economical manner. The objective of the present study is to examine the possibility of using washing technique to remediate lead contaminated gypsum sludge. The sludge is produced by neutralization of acidific effluent by lime addition in the effluent treatment plant (ETP) of lead-acid storage battery. Chemical forms of the lead contaminants are determined by sequential extraction. Since, acids and chelating agents are recognized to the most effective washing agents, the present study attempts remediation of lead contaminated gypsum sludge by washing the hazardous waste with hydrochloric acid (HCl) and ethylenediaminetetraacetic acid (EDTA) solutions. The results of washing experiments showed that EDTA is more efficient than HCl in lead extraction. Further, based on its high lead removal efficiency and lesser dissolution of solids, 0.1 M EDTA is considered as a most effective washing agent for removing lead from contaminated gypsum sludge.
Remediation of Lead Contaminated Gypsum Sludge
Characterization of industrial waste materials and by-products is a crucial step in their assessment for reuse or for their safe disposal in environmental friendly and economical manner. The objective of the present study is to examine the possibility of using washing technique to remediate lead contaminated gypsum sludge. The sludge is produced by neutralization of acidific effluent by lime addition in the effluent treatment plant (ETP) of lead-acid storage battery. Chemical forms of the lead contaminants are determined by sequential extraction. Since, acids and chelating agents are recognized to the most effective washing agents, the present study attempts remediation of lead contaminated gypsum sludge by washing the hazardous waste with hydrochloric acid (HCl) and ethylenediaminetetraacetic acid (EDTA) solutions. The results of washing experiments showed that EDTA is more efficient than HCl in lead extraction. Further, based on its high lead removal efficiency and lesser dissolution of solids, 0.1 M EDTA is considered as a most effective washing agent for removing lead from contaminated gypsum sludge.
Remediation of Lead Contaminated Gypsum Sludge
Raju, G. C. (author) / Rao, Sudhakar M. (author) / Reddy, B. V. Venkatarama (author)
GeoCongress 2008 ; 2008 ; New Orleans, Louisiana, United States
GeoCongress 2008 ; 563-570
2008-03-07
Conference paper
Electronic Resource
English
Remediation of Lead Contaminated Gypsum Sludge
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