Study on the Feasibility of Three Solutions for Removing Cu from a Soil
The comparative washing efficiencies of HCl, citric acid and Na2-EDTA solutions for removing Cu, the suitable concentrations of the washing solutions and the suitable washing numbers were studied by using a soil collected from a field near a smelter. The soil was successively washed with the 3 solutions of which the concentrations were between 0.02 mol·L-1 and 0.16 mol·L-1 for 5 times, respectively. The results showed that the suitable concentrations and washing numbers for each solution were as follows: HCl, 0.1mol·L-1, twice; citric acid, 0.1 mol·L-1, five times; Na2-EDTA, 0.06 mol·L-1, one time; The comprehensive analysis of the removing efficiency, cost and the risk of secondary pollution between the three preferable combinations of solution, concentration and washing number showed that twice washing with 0.1 mol·L-1 HCl was the best for removing Cu from the soil. Process conditions being optimized were as follows: liquid/solid ratio was 2.5:1; reaction time was 2 h by a shaker.
Cu polluted soil soil washing HC1
LIN Zhenzhu DU Congyuan WANG Guo
College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou,China 350002
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
1940-1944
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）