Enhanced Electrokinetic Remediation of Polluted Soil for Retrieving Nickel by Laboratory Study
Feasibility of electrolyte controlling with chelate agent, acidic or alkaline solution on electrokinetic remediation of nickel-contaminated sandy soil was investigated in the laboratory. The study mainly aimed at the effects of different controlling solutions that sprayed near the cathode or anode on the remediation efficiency, as well as the migration and distribution of nickel in the soil environment. The results showed that the mobility of nickel could be enhanced, but the nickel concentrations around the electrode still appeared to be very low, only occupying 6%, 9% and 46%, respectively if acetic acid, EDTA and citric acid were individually added into the cathode. However, the migration of nickel could tremendously be strengthened towards the electrode when the combined usage of NaOH and acetic acid solution was conducted to the anode and cathode, respectively. In meantime, 64%and 73% of the total nickel residues could be accumulated near the electrode, which created the favorable conditions for the further recovery and cleanup of nickel from the remedial soil.
electrokinetic remediation soil pollution nickel controlling solution ligands
ZHU Kun LU Jing HOU Bin ZHAO Yanfeng
School of Environmental & Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,Chi College of Environmental Science and Engineering,South China University of Technology,Guangzhou 5106 Hydrology Bureau of Shanxi Province,Taiyuan030001,Shanxi,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1929-1933
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）