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AWWA ACE65269
- Perchlorate Removal on GAC: Adsorption, Desorption and Destruction of Perchlorate
- Conference Proceeding by American Water Works Association, 06/01/2007
- Publisher: AWWA
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This powerpoint presentation outlines a study to develop a technology to remove andeliminate perchlorate from contaminated water. Specific objectives were to: investigate the adsorption and desorptioncharacteristics of perchlorate on granular activated carbon (GAC);to check the various operational conditions by batch(isotherm) and column studies, with the goal of usingthe smallest amount of regenerant to recover thehighest amount of perchlorate; and,to chemically reduce perchlorate into harmlesschloride. Process overview included: perchlorate adsorption on GAC; perchlorate desorption using NaBH<sub>4</sub> as regenerant; and,perchlorate destruction using in-situ produced nano-size iron particles. Parameters for desorption studies of perchlorate using NaBH<sub>4</sub> are given, along with the pilot set up in an Escondido, California, facility.
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