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环境化学  2015 

离子强度对吸附影响机理的研究进展

Keywords: 吸附,离子强度,静电作用,疏水作用,络合作用

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Abstract:

本文介绍了水溶液中离子或分子的水合、吸附剂表面的双电层模型以及内层与外层表面络合物,在此基础上讨论了离子强度对吸附的影响.一般来说,溶液的离子强度增大时,吸附质与吸附剂之间的静电作用减弱,疏水作用增强,络合作用变化不大.电解质离子能通过与吸附质离子产生离子交换竞争、对吸附质产生盐析或盐溶效应、改变溶液中大分子吸附质分子的大小、与吸附质离子形成离子对等方式影响吸附.

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