期刊论文

中文

环境化学

0254-6108

2013

32

6

1067-1072

10.7524/j.issn.0254-6108.2013.06.023

农业部农药残留试验基金项目（2010H216）资助；

本校为第一机构

采用批量平衡实验,研究了精喹禾灵在蒙脱石和高岭土中的吸附行为及作用机理.结果表明,精喹禾灵在这两种供试黏土矿物中的吸附过程分为快速吸附、慢速吸附和吸附平衡3个阶段,吸附平衡时间都约为12 h;Langmuir模型能较好地描述其在两种供试黏土矿物中的吸附行为;蒙脱石和高岭土对精喹禾灵的最大吸附容量的关系为蒙脱石>高岭土;傅立叶变换红外光谱以及X-射线衍射分析显示,在吸附过程中精喹禾灵分子进入了蒙脱石层间,而未进入到高岭土层间;蒙脱石主要是通过其层间结构对精喹禾灵进行吸附,而高岭土则主要是通过硅氧外表面发生吸附,其吸附作用力主要是氢键.

Batch equilibrium experiments were performed to study the adsorption characteristics and adsorption mechanisms of quizalofop-p-ethyl on montmorillonite and kaolinite. The results showed that the adsorption of quizalofop-p-ethyl on the two clay minerals could be divided into three phases:fast adsorption phase, slow adsorption phase,and equilibrium phase 12 h. The adsorption isotherms of quizalofop-p-ethyl on the two clay minerals were well fitted by the Langmuir equation. The adsorption capacity of quizalofop-p-ethyl on montmorillonite was larger than on kaolinite. FT-IR spectroscopy and XRD an...