作　　者： (张俊可）; (彭琳珊）; (张郴艳）; (何建英）; (庞钰华）; (王思梦）; (冯彩霞）;

机构地区： 河南大学化学化工学院,河南开封475004

出　　处： 《化学研究》 2017年第4期409-415,452,共8页

摘　　要： 通过分析不同电动修复时间对土壤的电流、pH、电导率及铬镍去除率的影响确定最佳电动修复时间为5 d.再通过正交解吸实验,考察阴极控制液和控制液浓度对电动修复铬镍复合污染土壤的影响.结果表明柠檬酸是EDTA、柠檬酸、酒石酸、乙酸四种常见阴极控制液中的最佳控制液,其最佳浓度为0.1 mol/L.在最佳的修复实验条件下铬的去除率可以达到61.76%,但是镍的修复率只有16.29%,这可能是由于加了阴极控制液后最佳修复时间应该适当延长. The effects of electro-kinetic remediation time on soil current,pH,electrical conductivity and Cr-Ni removal rate were studied to determine the optimal treated time.Orthogonal desorption experiments are then conducted to study the effect of cathode liquid and the concentration on electro-kinetic remediation of chromium-nickel combined contaminated soil.The results showed that,among four types of cathode liquid including EDTA,citric acid,tartaric acid and acetic acid,citric acid is the most effective cathode liquid with 0.1 mol/L of optimal concentration.Under the optimum experimental conditions,the removal rate of chromium can reach 61.76%,but the rate of nickel is only 16.29%.This may be due to the fact the optimum treated time should be extended after the addition of citric acid used as cathode liquid.

关 键 词： 电动修复 铬镍复合污染土壤 柠檬酸