生态与农村环境学报2012，Vol.28Issue(5)：563-568,6.
广西刁江流域Cd和Pb复合污染稻田土壤的钝化修复
Remediation of Contaminated Paddy Soil by Immobilization of Pollutants in the Diaojiang Catchment, Guangxi Province
摘要
Abstract
Effects of sepiolite, lime and phosphate immobilizing cadmium and lead in contaminated paddy soil in the Diaojiang catchment, Guangxi were investigated through a field experiment, and mechanisms of the effects were analyzed through fractionation of the pollutants in the soil. Results show that the use of these amendments markedly increased yield of the crop, both grain and straw, to the greatest extent, by 25. 4% and 28. 3 % , respectively. The effect of combined application of sepiolite and phosphate was the most significant. The application of these immobilizers significantly decreased Cd and Pb concentrations in all the parts of the plant. Especially in brown rice, the drop reached 65. 12% and 61. 86% , respectively. The effect of combined application of the immobilizers was more significant than that of the application of only one kind of immobilizer in the above-ground part of the plant. The brown rice produced in the treatment of combined application of sepiolite and phosphate or lime met Maximum Levels of Contaminants in Foods ( GB 2762 — 2005) in Cd concentration. The application of immobilizers, combined or single, significantly reduced the concentrations of TCLP-extractable Cd and Pb (TCLP, i. e. toxicity characteristic leaching procedure), with the maximal possible reduction reaching 28. 86% and 45. 60% , respectively. Combined application was obviously more effective than the application of only one. To sum up, combined application of sepiolite and phosphate is the most effective recommendation for remediation of Cd and Pb contaminated paddy soil by immobilizing the pollutants in Diaojiang catchment, Guangxi.关键词
钝化修复/海泡石/石灰/磷肥/水稻/镉/铅/刁江Key words
immobilization/sepiolite/lime/phosphate/rice/cadmium/lead/Diaojiang River分类
资源环境引用本文复制引用
王林,徐应明,梁学峰,孙国红,孙约兵,林大松..广西刁江流域Cd和Pb复合污染稻田土壤的钝化修复[J].生态与农村环境学报,2012,28(5):563-568,6.基金项目
国家自然科学基金(40901154,21177068,21107056) （40901154,21177068,21107056）
农业部农业科研杰出人才及其创新团队资金 （）
公益性行业(农业)科研专项(201203045) （农业）
天津市自然科学基金(10JCYBJC06300) （10JCYBJC06300）
中央级公益性科研院所基本科研业务费专项 （）
