除草剂甲基磺草酮在土壤中的吸附特性  

Adsorption Properties of Mesotrione in Soils

作　　者：殷春涛[1,2] 陆文龙 赵江山 张欢欢 张玲玲 陈天明 YIN Chun-tao;LU Wen-long;ZHAO Jiang-shan;ZHANG Huan-huan;ZHANG Ling-ling;CHEN Tian-ming(College of Environmental Sciences and Engineering,Yancheng Institute of Technology-,Yancheng 224051,China;Yancheng Keyida Testing Technology-Co.Ltd,Yancheng 224000,China;Yellow Sea Cement Co.Ltd of Jiangsu Province,Yancheng 224000,China)

机构地区：[1]盐城工学院环境科学与工程学院,江苏盐城224051 [2]盐城科易达检测技术有限公司,江苏盐城224000 [3]江苏黄海水泥有限公司,江苏盐城224000

出　　处：《杂草学报》2018年第1期57-62,共6页Journal of Weed Science

基　　金：江苏省盐城市农业科技创新专项引导资金项目(编号:YKN2015008)

摘　　要：利用平衡振荡法研究甲基磺草酮在不同土壤中的吸附及其影响因素。结果表明,甲基磺草酮在2种供试土壤上的吸附性能较好地用Freundlich方程拟合,吸附常数K_d<5,吸附性能较差;甲基磺草酮在盐城市、宜兴市土壤中温度为25℃时的吸附自由能分别为-18.23、-13.53 kJ/mol;甲基磺草酮在土壤中的吸附以物理吸附为主,该吸附过程是自发进行的;ΔH>0,说明该反应为吸热反应,温度升高,有利于反应进行。The adsorption properties of mesotrione and factors influencing it in different types of soils were studied using the batch equilibrium method. Adsorption of mesotrione in two soil types followed the Freundlich equation. An adsorption constant,Kd 〈5 indicated that the adsorption capability was poor. The Gibbs free energy（ΔG） for mesotrione adsorption in paddy and marsh soils from Yancheng City and Yixing City at 25 ℃ were-18. 23 and-13. 53 kJ/mol,respectively. Mesotrione primarily adsorbed physically to soils and the adsorption process was spontaneous. A positive value of △H for the adsorption process indicated that the reaction was endothermic,thus increments in temperature promote the reaction.

关 键 词：甲基磺草酮 吸附性能 土壤 平衡振荡法 

分 类 号：X592[环境科学与工程—环境工程]