长江科学院院报2017，Vol.34Issue(6)：24-28,34,6.DOI:10.11988/ckyyb.20160231
镉污染稻田土壤土柱淋洗修复研究
Remediation of Cadmium-contaminated Paddy Soils by Column Leaching
摘要
Abstract
Remediation of cadmium-contaminated paddy soils by column leaching with ferric chloride was carried out.The effects of leaching conditions including dry or wet state of soil,concentration and volume of leaching solution,stirring times and leaching time on the removal rate of Cadmium (Cd) were investigated systematically.The distribution of Cd in the soil column was also studied in depth.Results suggest that the remediation effect of dry washing was better than that of wet washing.The increase of concentration and volume of leaching solution,and stirring times as well as leaching time could all result in a limited improvement of the removal rate of Cd.The removal rate of Cd achieved a maximum value of 25.4％ when using dry washing with the concentration of'leaching solution of 0.05 mol/L,three times of stirring,2 days of leaching,and 450 mL leaching solution.Under this optimal condition for leaching,nearly 86.7％ of the removed Cd existed in pore water,which implies that discharging the pore water efficiently is crucial in the process of leaching remediation for paddy soils.关键词
镉污染/稻田土壤/土柱淋洗/三氯化铁/修复Key words
cadmium contamination/paddy soil/column leaching/ferric chloride/remediation分类
资源环境引用本文复制引用
罗希,林莉,李青云,胡艳平..镉污染稻田土壤土柱淋洗修复研究[J].长江科学院院报,2017,34(6):24-28,34,6.基金项目
水利部公益性行业科研专项(201501019) （201501019）
中央级公益性科研院所基本科研业务费项目(CKSF2015014/SH) （CKSF2015014/SH）
上海同济高廷耀环保科技发展基金会资助项目 （）
