Journal
ELECTROCHIMICA ACTA
Volume 218, Issue -, Pages 140-148Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.09.121
Keywords
Electrokinetic remediation; assisting agents; multi-heavy metals; kaolin
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Funding
- National Natural Science Foundation of China [21277142]
- Cross-disciplinary Collaborative Teams Program for Science, Technology and Innovation of Chinese Academy of Sciences
- Hundred Talents Project of the Chinese Academy of Science
- Important Deployment Project of Chinese Academy of Sciences [KZZD-EW-TZ-16]
- CAS Interdisciplinary Innovation Team
- Science and Technology Service Network Initiative (STS) Project of Chinese Academy of Sciences
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A novel assisting agent (citric acid+calcium chloride, CA+CaCl2), combined the advantages of two diffenrent compositions, has been investigated for the electrokinetic (EK) remediation of multi-metals (Cd, Cu, Ni, Pb, Zn) contaminated kaolin simultaneously. The result shows that CA and CaCl2 concentration significant affect the removal efficiency of heavy metals. The optimum concentration is obtained at the 0.2 mol/L CA mixed with 0.05 mol/L CaCl2 in this study, and the removal efficiencies of Cd, Cu, Ni, Pb, and Zn were 98.19%, 95.24%, 98.95%, 86.21%, and 99.01%, respectively, with the consuming of 124.8 KWh/m(3) electric energy. Compared to traditional CA and HCl treatment, the CA+CaCl2 poses the advantages of cost-efficient, eco-friendly, high removel efficiency for multi-heavy metals, may promote the progress toward commercial application. (C) 2016 Elsevier Ltd. All rights reserved.
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