阴离子表面活性剂对土壤吸附噻吩磺隆的影响  

Effect of surfactant on adsorption of thifensulfuron in soils

作　　者：汪传刚[1] 龚道新[1] 施翔[2] 覃伍丽[1] 卫麦霞[3] 

机构地区：[1]湖南农业大学农业环境保护研究所,湖南长沙410128 [2]云南农业大学资源与环境学院,云南昆明650201 [3]湖南农业大学烟草工程技术研究中心,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2007年第2期221-224,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：农业部农药检定所项目(NYCL20050012)

摘　　要：采用振荡平衡法研究了阴离子表面活性剂十二烷基硫酸钠(SDS)存在下噻吩磺隆在2种土壤中的吸附行为.结果表明:SDS会使噻吩磺隆在红壤中的吸附量减少,但随着SDS质量浓度的增大,噻吩磺隆的吸附常数呈现增加—减少—增加的变化趋势;噻吩磺隆在河潮土中的吸附受SDS的影响更为复杂,表现为较低质量浓度(小于700 mg/L)的SDS减少噻吩磺隆的吸附量,而较高质量浓度(700～900 mg/L)的SDS则增加噻吩磺隆的吸附量.SDS对噻吩磺隆在2种土壤中的吸附均可用Freundlich吸附等温式进行描述.Effect of the anionic surfactant sodium dodecyl sulfate （SDS） on the sorption of thifensulfuron in krasnozem and river cultivated fluviogenic soil were investigated. The results showed that SDS could reduce the adsorption of thifensulfuron in krasnozem, with increasing concentration of SDS, the adsorption constant of thifensulfuron indicated the trend, ＂increase—decrease—increase＂. It was a more complex process than the adsorption amount of thifensulfuron in river cultivated fluviogenic soil.Below 700 mg/L of SDS concentration, the thifensulfuron adsorption was reduced, while above 700 mg/L, thifensulfuron adsorption was increased. The isotherm data of thifensulfuron, when SDS existed in two soils, were fit to the Freundlich equation.

关 键 词：噻吩磺隆 吸附 十二烷基硫酸钠 

分 类 号：X53[环境科学与工程—环境工程] X592