Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 40, Issue 3, Pages 285-295Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2004.03.009
Keywords
natural; clinoptilolite; ZSM-5; MCM-41; CPB; HDTMA; chromate; adsorption
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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.
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