Adsorption of chromate by surfactant-modified zeolites and MCM-41 molecular sieve
Adsorption of chromate by surfactant-modified zeolites and MCM-41 molecular sieve
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DOI：
10.1016/j.seppur.2004.03.009
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发表时间：
2004-12-15
影响因子：
8.6
通讯作者：
Seyedeyn-Azad, F
中科院分区：
文献类型：
--
作者：
Ghiaci, M;Kia, R;Seyedeyn-Azad, F
采用季胺改性的合成和天然沸石，即十六烷基三甲基溴化铵（HDTMA）和正十六烷基溴化吡啶鎓（CPB）以及MCM-41分子筛来去除水溶液中的铬酸盐。对上述材料的铬酸盐吸附实验获得的数据进行了比较。结果表明，胺对改性沸石的吸附数据与Langmuir等温方程一致。合成的 MCM-41 的最大铬酸盐吸附量远大于天然斜发沸石和 ZSM-5 沸石。 (C) 2004 Elsevier B.V 保留所有权利。
Synthetic and natural zeolites, modified by the quaternary amines, i.e. hexadecyltrimethylammonium (HDTMA) bromide and n-cetylpyridinium bromide (CPB) as well as MCM-41 molecular sieve were employed for removal of chromate from aqueous solution. Obtained data from chromate adsorption experiments over the mentioned materials were compared. It was shown that adsorption data for modified zeolite using the amine was consistent with Langmuir isotherm equation. The maximum chromate adsorption over as synthesized MCM-41 was much greater than that of the natural clinoptilolite and ZSM-5 zeolites. (C) 2004 Elsevier B.V All rights reserved.