Removal of fluorine from contaminated field soil by anolyte enhanced electrokinetic remediation |
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Authors: | Shufa Zhu Jinghui Zhang Tieyou Dong |
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Institution: | (1) College of Chemical Engineering, Henan University of Science and Technology, 471003 Luoyang, China;(2) Institute of Environmental Engineering, Henan University of Science and Technology, 471003 Luoyang, China |
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Abstract: | Feasibility of electrolyte conditioning with strong alkaline solution on electrokinetic remediation of fluorine-contaminated
field soil was investigated in the laboratory. The initial concentration of fluorine, pH and organic matter content in the
soil were 1,058 mg kg−1, 8.17 and 20.51 g kg−1, respectively. Electrokinetic experiments were conducted under two different concentrations of alkaline solution and three
different voltage gradients. The removal of fluorine increased with the concentration of the alkaline solution and applied
voltage and fluorine removed up to 73% within 10 days. Anolyte enhanced electrokinetic process could promote effectively the
migration of fluoride in soil. The electromigration was the main transport mechanism and the electroosmotic flow had an effect
on the migration of fluoride in soil. Appropriate anolyte enhanced electrokinetic method could be applied to remediate fluorine
from contaminated field soil and has significant potential for removing other anionic pollutants such as arsenate and chromate
from soil. |
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