有机皂土的双硫腙修饰及其对水中铅离子的吸附行为
Modification of organobentonite with dithizone and its adsorption behavior for lead ion in water作者机构：沈阳理工大学环境与化学工程学院辽宁沈阳110168
出 版 物：《化工学报》 (CIESC Journal)
年 卷 期：2008年第59卷第6期
页 面：1535-1540页
核心收录：
学科分类：081704[工学-应用化学] 0817[工学-化学工程与技术] 08[工学] 081701[工学-化学工程]
主 题：有机皂土 双硫腙 修饰 铅 吸附行为 火焰原子吸收光谱法
摘 要：The adsorption behavior of the organobentonite (CTMAB-bentonite) modified with dithizone for lead ion in water was investigated.A sort of cheap sorbent was prepared through modifying organobentonite with dithizone and was characterized with *** means of flame atomic absorption spectrometry (FAAS), the adsorption situation and mechanism were *** results showed that after treating bentonite with cetyl trimethyl ammonium bromide (CTMAB),dithizone could be immobilized on the bentonite *** lead ion in water could be adsorbed quantitatively on the organobentonite modified with dithizone, and the adsorbed quantity was affected by pH value of medium, temperature and *** adsorption behavior followed a Langmuir adsorption isotherm and a pseudo-second-order kinetic *** enthalpy change of the adsorption process was 58.432 kJ·mol-1,and Gibbs free energy change was negative at different *** reaction of adsorption was an spontaneous, endothermal process.
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