Removal of heavy metals from kaolin using an upward electrokinetic soil remedial (UESR) technology

Journal of Hazardous Materials
Jing-Yuan WangOlena Stabnikova

Abstract

An upward electrokinetic soil remedial (UESR) technology was proposed to remove heavy metals from contaminated kaolin. Unlike conventional electrokinetic treatment that uses boreholes or trenches for horizontal migration of heavy metals, the UESR technology, applying vertical non-uniform electric fields, caused upward transportation of heavy metals to the top surface of the treated soil. The effects of current density, treatment duration, cell diameter, and different cathode chamber influent (distilled water or 0.01 M nitric acid) were studied. The removal efficiencies of heavy metals positively correlated to current density and treatment duration. Higher heavy metals removal efficiency was observed for the reactor cell with smaller diameter. A substantial amount of heavy metals was accumulated in the nearest to cathode 2 cm layer of kaolin when distilled water was continuously supplied to the cathode chamber. Heavy metals accumulated in this layer of kaolin can be easily excavated and disposed off. The main part of the removed heavy metals was dissolved in cathode chamber influent and moved away with cathode chamber effluent when 0.01 M nitric acid was used, instead of distilled water. Energy saving treatment by UESR technolog...Continue Reading

Citations

May 21, 2013·Environmental Monitoring and Assessment·Iman Tahmasbian, Ali Akbar Safari Sinegani
Jan 21, 2016·Environmental Technology·A R EstabraghA A Javadi
Feb 4, 2010·Journal of Hazardous Materials·Peng ZhangGuobin Tian
Jul 18, 2009·Environmental Pollution·Apostolos GiannisEvangelos Gidarakos
May 19, 2007·Journal of Colloid and Interface Science·A RevilS Finsterle
May 2, 2021·Environmental Monitoring and Assessment·Arulpoomalai Ayyanar, Shashidhar Thatikonda

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