Removal of Lead from Contaminated Water and Clay Soil Using a Biosurfactant
Publication: Journal of Environmental Engineering
Volume 132, Issue 7
Abstract
Lead removal from water and contaminated soils was investigated using biosurfactant, anionic, and nonionic surfactants in continuously stirred batch reactors. Lead-contaminated water up to and clay soil up to were used in this investigation. The surfactant concentration up to 10 critical micelle concentration was used. The speciation of lead into the micelles was quantified and the lead removal efficiency depended on the level of contamination, surfactant type, and concentration. Of the surfactants used, biosurfactant (produced from used vegetable oil) had the best removal efficiency (75%) at a lead contamination of in water at pH of over 12. The Fourier-transformed infrared spectroscopy study showed that the carboxyl group in the biosurfactant was effective in removing the lead from the solution. Langmuir and Freundlich relationships were used to represent the micelle partitioning of lead in the surfactant solutions. Desorption of lead from contaminated kaolinite clay was represented using linear isotherms. The biosurfactant solution had a higher micelle partitioning for the lead from contaminated water and desorbing the lead from the contaminated soil compared to the other chemical surfactants.
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Acknowledgment
This work was supported by the Center for Innovative Grouting Materials and Technology under a grant from the Gulf Coast Hazardous Research Center with the EPA, funding agreement number R82859801. The sponsor is not responsible for any of the findings reported in this paper.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 132 • Issue 7 • July 2006
Pages: 777 - 786
Copyright
© 2006 ASCE.
History
Received: Jan 26, 2004
Accepted: Nov 17, 2005
Published online: Jul 1, 2006
Published in print: Jul 2006
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