Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Anhui Agricultural Sciences》 2009-21
Add to Favorite Get Latest Update

Effects of Adding Na-montmorillonite on Red Soil Polluted by Heavy Metals

LIN Yun-qing et al (State Key Laboratory of Soil and Sustainable Agricultural Development,Nanjing Institute of Soil Science,Chinese Academy of Sciences,Nanjing,Jiangsu 210008)  
[Objective] The purpose was to study the modified effect of Na-montmorillonite on Cu,Zn,Pb and Cd in heavy metal polluted red soil.[Method] In the indoor experiment by constant temperature culture,with polluted red soil from the Guixi Copper Tailings in Jiangxi Province as samples,5 treatments of adding 1%,2%,4% and 8% Na-montmorillonite and non-adding Na-montmorillonite were set up,the available heavy metal,Na+ in water extract,electric conductivity and pH in soil from each sample were measured and their correlations were analyzed.[Result] Adding 4% and 8% Na-montmorillonite could significantly decrease the contents of available Cu,Zn,Pb and Cd in heavy metal polluted red soil,being 33.8% and 40.2%,33.2% and 37.2%,28.4% and 32.7%,35.7% and 34.5% lower than that in CK,resp ectively.Na+ in water extract,electric conductivity and pH in soils was gradually increased with the increase of Na-montmorillonite adding amount.[Conclusion] Analysis on the passivation mechanism showed that the addition of Na-montmorillonite in heavy metal polluted red soil could rise the pH value of soil and increase its adsorption properties,which made the heavy metal ions produce replacement reaction with Na+ in montmorillonite.
【Fund】: 国家重点基础研究发展规划(973)项目(2007CB936604);; 中国科学院知识创新工程重要方向项目(KSCX2-YW-N-38)资助
【CateGory Index】: X53
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved