title: Electrokinetic remediation of fluorine-contaminated soil and its impact on soil fertility.
abstract: Compared to soil pollution by heavy metals and organic pollutants, soil pollution by fluorides is usually ignored in China. Actually, fluorine-contaminated soil has an unfavorable influence on human, animals, plants, and surrounding environment. This study reports on electrokinetic remediation of fluorine-contaminated soil and the effects of this remediation technology on soil fertility. Experimental results showed that electrokinetic remediation using NaOH as the anolyte was a considerable choice to eliminate fluorine in contaminated soils. Under the experimental conditions, the removal efficiency of fluorine by the electrokinetic remediation method was 70.35%. However, the electrokinetic remediation had a significant impact on the distribution and concentrations of soil native compounds. After the electrokinetic experiment, in the treated soil, the average value of available nitrogen was raised from 69.53 to 74.23 mg/kg, the average value of available phosphorus and potassium were reduced from 20.05 to 10.39 mg/kg and from 61.31 to 51.58 mg/kg, respectively. Meanwhile, the contents of soil available nitrogen and phosphorus in the anode regions were higher than those in the cathode regions, but the distribution of soil available potassium was just the opposite. In soil organic matter, there was no significant change. These experiment results suggested that some steps should be taken to offset the impacts, after electrokinetic treatment.
authors.affiliation: Chemical Engineering and Pharmaceutics College, Henan University of Science and Technology, Luoyang, 471023, China. axore@163.com.
authors.forename: Ming
authors.initials: M
authors.lastname: Zhou
authors.affiliation: Chemical Engineering and Pharmaceutics College, Henan University of Science and Technology, Luoyang, 471023, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Chemical Engineering and Pharmaceutics College, Henan University of Science and Technology, Luoyang, 471023, China.
authors.forename: Shufa
authors.initials: S
authors.lastname: Zhu
authors.affiliation: Chemical Engineering and Pharmaceutics College, Henan University of Science and Technology, Luoyang, 471023, China.
authors.forename: Yana
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Chemical Engineering and Pharmaceutics College, Henan University of Science and Technology, Luoyang, 471023, China.
authors.forename: Jingming
authors.initials: J
authors.lastname: Xu
mesh_terms: D002681:China; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D052918:Environmental Restoration and Remediation / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D005459:Fluorides / Q000032:analysis; D005461:Fluorine / Q000032:analysis*; D007700:Kinetics; D019216:Metals, Heavy / Q000032:analysis; D012987:Soil / Q000737:chemistry* / Q000592:standards; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D005461:Fluorine; D005459:Fluorides
keywords: Electrokinetic remediation; Fluorine-contaminated soil; Soil fertility