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环境化学  2015 

精喹禾灵在高岭土和蒙脱石中的吸附行为

Keywords: 蒙脱石,高岭石,黏土矿物,精喹禾灵,吸附

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Abstract:

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12h;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.

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