土壤学报2012，Vol.49Issue(3)：508-517,10.
四种改良剂对铜和镉复合污染土壤的田间原位修复研究
FIELD IN-SITU REMEDIATION OF Cu-Cd POLLUTED SOIL BY FOUR AMENDMENTS
摘要
Abstract
Effects of four amendments, i. e. lime, apatite, montmorillonile and attapulgite, in in-situ remediation of Cu-Cd contaminated soil nearby a copper smelter were studied. Ryegrass ( Lolium perenne L. ) was planted in the experi- merit. Plant absorbability, chemical extractability and concentrations in sail solution of Cu and Cd were cited as indices for evaluation of remediation effect of the amendments. Besides, correlations of contents of exchangeable Cu and Cd in soil and in soil solution with Cu and Cd uptake by ryegrass were also studied. Results show that in treatment of lime at a high dosage (0.4% of the polluted soil of the plow layer) , ryegrass showed the best effect in enriching Cu-Cd. Lime significantly lower toxicity of the heavy metals and promoted growth and Cu-Cd bioaccumulation of ryegrass. Amendment of lime and apatite, in all the rate treatments, significantly decreased exchangeability of Cu in the soil; Amendment of lime, apatite and montmorillonite, in all the rate treatments, increased pH of and decreased Cu and Cd concentrations in the soil solution significantly. Cu concentration in the shoots and roots of ryegrass was positively related to soil exchangeable Cu and Cu concentration in soil solution.关键词
改良剂/重金属/黑麦草/田间修复Key words
Amendments/ Heavy metal/ Ryegrass/ Field remediation分类
资源环境引用本文复制引用
杜志敏,郝建设,周静,李辉信,高倩圆,崔红标,郑学博,马超,梁家妮..四种改良剂对铜和镉复合污染土壤的田间原位修复研究[J].土壤学报,2012,49(3):508-517,10.基金项目
国家"973"计划项目(2007CB936604)和国家科技支撑计划项目(2011BAD41B01,2009BADA6B04,2009BADC4B02)资助 （2007CB936604）
