水土保持学报2012，Vol.26Issue(2)：265-270,6.
低分子量有机酸强化烟草修复镉污染土壤的适用性研究
Feasibility of Low Molecular Weight Organic Acids in Enhancing Phytoextraction of Cadmium from Soils with Tobacco（Nicotiana tabacum L.）
摘要
Abstract
A pot experiment was conducted to investigate the feasibility of three low molecular weight acids（LMWOA） including tartaric acid,citric acid and oxalic acid in enhancing phytoextraction of cadmium from soils with tobacco（Nicotiana tabacum L.）.Three kinds of LMWOA could decrease soil pH,consequently increased the availability of cadmium in soils.The translocation of cadmium in tobacco was inhibited by tartaric acid-and oxalic acid-treatments,and citric acid treatment in neutral soil,but was promoted by citric acid treatment in acid soil.LMWOA at the rate of 31.25 mmol/kg increased the shoot weight of tobacco.At this rate,cadmium accumulation in the shoot of tobacco increased by 42.95% and 28.67%,respectively,on citric acid-and oxalic acid-treated acid soil,while increased by 40.91% on citric acid-treated neutral soil.All tartaric acid treatment decreased cadmium accumulation in tobacco shoot.These results illustrated that citric acid and oxalic acid at the rate of 31.25 mmol/kg could enhance cadmium extraction from soils with tobacco.However,to obtain equal extraction efficiency as that of EDTA,the amounts of the two kinds of LMWOA have to be increased.It was suggested that LMWOA be unsuitable to enhance extraction of cadmium from soil with tobacco.关键词
镉/低分子量有机酸/烟草/植物修复Key words
cadmium/low molecular weight organic acid/tobacco/phytoextraction分类
资源环境引用本文复制引用
包姣,韦惠琴,赵秀兰..低分子量有机酸强化烟草修复镉污染土壤的适用性研究[J].水土保持学报,2012,26(2):265-270,6.基金项目
中央高校基本科研业务费专项 （）
西南大学生态学重点学科“211工程”建设项目,西南大学资源环境学院“光炯”创新基金项目 （）
