有机黏土对污染土中HCH的固定及黑麦草生长的影响  

Immobilization of hexachlorocyclohexane and growth of ryegrass by organic clays in soils

作　　者：刘总堂[1,2] 许敏[1] 林云青[1] 卢再亮[1] 章钢娅[1] 

机构地区：[1]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,江苏南京210008 [2]中国科学院研究生院,北京100049

出　　处：《中国环境科学》2010年第4期533-538,共6页China Environmental Science

基　　金：国家"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)

摘　　要：在温室条件下,利用黑麦草盆栽实验研究了有机黏土对污染土壤中六六六的吸附固定效果及其对黑麦草生长的影响.结果表明,添加有机黏土可以有效固定污染土中的六六六,降低其移动性和生物有效性,减少六六六在黑麦草中的积累.与对照相比,添加1%～8%有机黏土可固定土壤中50.4%～78.5%的六六六,当添加比例为8%时,黑麦草地上部分和根系中六六六的含量分别降低了53.9%～87.6%和37.4%～56.6%,各种处理的效果与对照相比均达到显著差异(P<0.05).添加1%～4%有机黏土,能有效促进黑麦草茎叶部分的生长.Effects of the application of organic clays as soil amendments on hexachlorocyclohexane （HCH） immobilization and on ryegrass growth in contaminated soils were investigated. The organic clays have proved to be effective environmental and agronomic amendments for reducing the mobility and biological effectiveness of HCH. The results from pot experiments in greenhouse indicated that the organic clays could significantly fix the HCH in soils and reduce its concentrations in ryegrass. Compared with the control,concentrations of HCH in roots and shoots of ryegrass were reduced by 53.9%～87.6% and 37.4%～56.6% through addition of 8% organic clays,the shoot biomass increased by 52.3%～119.3% through the addition of 1%～4% organic clays.

关 键 词：有机粘土 六六六 黑麦草 盆栽实验 

分 类 号：X592[环境科学与工程—环境工程]