有机膨润土载体对乙草胺在土壤中迁移的影响  

INFLUENCE OF ORGANO-BENTONITES AS CARRIERS ON THE MOVEMENT OF ACETOCHLOR IN SOIL

作　　者：任彩霞[1] 李建法[1] 吴丽琴[1] 林云芬 李益民[1] 

机构地区：[1]绍兴文理学院化学系,绍兴312000

出　　处：《环境化学》2010年第5期860-864,共5页Environmental Chemistry

基　　金：浙江省自然科学基金资助项目(Y307106)

摘　　要：以季铵盐阳离子改性得到的有机膨润土做载体,调节除草剂乙草胺在土壤中的迁移.土壤层释放实验表明,有机膨润土负载后乙草胺释放减缓,与未负载时相比累计释放量减少1/2—3/4.土壤柱实验表明,有机膨润土可延缓乙草胺淋溶,减少淋溶量.其中采用样品100CTMAB-Bent为载体时,乙草胺10d累计淋溶量仅15%,而土壤表层剩余量占55%以上.说明有机膨润土做载体可延长除草剂药效、减轻对地下水的污染.The organo-bentonites prepared by modification with quaternary ammonium cation were used as carriers of herbicide acetochlor,so as to adjust its movement in soil.The results of release experiment through soil layer indicated that acetochlor release was slowed down with organo-bentonites support and the cumulative amount released was reduced by 1/2—3/4 in comparison with the un-supported herbicide.The experiments in soil column showed a hysteresis of acetochlor leaching with organo-bentonites support,and total leaching amount was reduced.Particularly when 100CTMAB-Bent was used,the cumulative amount of acetochlor leached after 10 days was only 15%,and residue in the top surface of soil accounted for above 55%.The results implied that the use of organo-bentonites as carriers of herbicide was beneficial for extending its bio-effect and reducing its pollution to groundwater.

关 键 词：除草剂 农药 粘土 释放 淋溶 

分 类 号：X53[环境科学与工程—环境工程]