阴离子表面活性剂对草甘膦在土壤中吸附的影响  

A Study of the Effects of the Anionic Surfactant on the Adsorption of Glyphosate in Soil

作　　者：李岩[1,2] 保艳敏[1] 杨敏[1] 王红斌[1] 

机构地区：[1]云南民族大学化学与生物技术学院,云南昆明650031 [2]大连重工.起重集团有限公司质量管理处,辽宁大连116031

出　　处：《云南民族大学学报（自然科学版）》2009年第1期55-57,共3页Journal of Yunnan Minzu University:Natural Sciences Edition

基　　金：国家民委--教育部共建民族药资源化学重点实验室科研资助项目(MJY07006)

摘　　要：采用振荡平衡法研究了阴离子表面活性剂十二烷基苯磺酸钠(SDBS)存在下草甘膦在土壤中吸附行为的影响.结果表明:在SDBS小于其临界胶束浓度(CMC)时,草甘膦的吸附量随SDBS浓度的增加而减少;当SDBS浓度接近其临界胶束浓度时,草甘膦的吸附量最小;而当SDBS浓度大于其临界胶束浓度时,草甘膦的吸附量随SDBS浓度的增加而增加.随着SDBS质量浓度的增大,草甘膦的吸附常数呈现减少———增加———减少的变化趋势.The effects of the anionic surfactant sodium dodecylbenzene sulfonate （SDBS） on the sorption of glyphosate in soil have been investigated. The results have showed that the adsorption will be reduced when the SD-BS concentration is less than CMC; the adsorption will he minimized when the SDBS concentration approaches to CMC; the adsorption will be increased when the SDBS concentration is more than CMC. With the increment of the SDBS concentration, the adsorption constant of glyphosate reveals the trend of “decrease-increase-increase”.

关 键 词：草甘膦 表面活性剂 吸附 土壤 

分 类 号：TQ457[化学工程—农药化工]