摘要
试验选用重铬酸钾作为污染物,配制高岭土中Cr(Ⅵ)初始质量分数为100mg/kg和500mg/kg。试验研究了对阴极电解产生的OH-的控制对电动修复效率的影响以及不同的控制方式对电动修复效率的影响。试验结果表明:对阴极电解产生的pH进行控制可以明显提高Cr(Ⅵ)去除效率;多种控制方式中,以盐酸的中和控制最为有效,可使去除效率达到90.8%,但引起的土壤酸化问题应当进一步进行研究。
Electrokinetic remediation of chromium polluted kaolin at laboratory scale was studied. Potassium dichromate was chosen as pollutant and the initial concentration was 100mg/kg kaolin and 500mg/kg kaolin. The effect of pH control at cathode for electrokinetic removal of Cr(VI) from kaolin soil was studied, results indicated that pH control at cathode can improve the removal efficiency of hexavalent chromium from kaolin significantly. Neutralizing OH- resulted from the electroanalysis of cathode with hydrochloric acid was the most effective method, with removal efficiency of hexavalent chromium up to 90.8%, but it is necessary to prevent acidification of soil.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2007年第6期35-36,41,共3页
Environmental Science & Technology
关键词
电动修复
六价铬
污染
土壤
electrokinetic remediation
hexavalent chromium
pollution
soil
