水土保持学报2011，Vol.25Issue(1)：34-38,5.
有机酸淋洗对土壤Cd纵向迁移及有效性的影响
Effects of Soil Leaching with Organic Acid on Vertical Movement and the Availability of Cd in Soil
摘要
Abstract
A soil column leaching experiment with the natural contaminated soil was conducted to investigate the influence of EDTA, citric acid and oxalic on vertical movement of Cd in the contaminated soil and the variation of available Cd in the top contaminated soil(0-20 cm)at the current situation of heavy metal pollution in sewage irrigation area of Baoding. The results showed that total Cd in the top contaminated soil all decreased with the increasing of added organic acid compared with the control, the contents of total Cd decreased by 4. 72％,8.96％, 19. 38％, 30. 46％ respectively under EDTA treatments; by 0. 42％, 1. 14％,16.9 ％, 27.9 ％ respectively under citric acid treatments and by 4.23 ％, 5.70 ％, 14.01％, 17.75 ％ respectively under oxalic treatments. Moreover, total Cd of underlayer soils(20-50 cm)increased migration depth with the addition of organic acid increases, which could reach 40 cm. The content decreased with the increasing of depth. In short, the migration ability of three organic acid on Cd in the contaminated soil was at the order of EDTA＞citric acid＞oxalic. The contents of available Cd in the top contaminated soil were all increased with the increasing of addition amount of organic acid except citric acid treatments(＜75 kg/667m2), there were significant line positive correlation between the available Cd and the amount of organic acid.关键词
Cd污染土壤/有机酸/土柱淋洗/纵向迁移/有效性Key words
Cd-contaminated soil/ organic acid/ column leaching/ vertical movement/ availability分类
资源环境引用本文复制引用
李燕丽,李博文,刘微,芦小军..有机酸淋洗对土壤Cd纵向迁移及有效性的影响[J].水土保持学报,2011,25(1):34-38,5.基金项目
河北省自然科学基金项目(2007000459) （2007000459）
