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Removal of Ammonia from Aqueous Solutions with Zeolite and Bentonite  

이화영 (한국과학기술연구원 금속공정연구센터)
오종기 (한국과학기술연구원 금속공정연구센터)
김성규 (한국과학기술연구원 금속공정연구센터)
고현백 ((주)세화환경 환경기술연구소)
Publication Information
Resources Recycling / v.11, no.3, 2002 , pp. 3-9 More about this Journal
Abstract
Relnoval of ammonia from aqueous solutions has been studied with zeolite and bentonite minerals. Zeolite and bentonite powder were supplied by a domestic company and used as delivered without further purification. The aqueous pH was found to increase by addition of zeolite or bentonite up to pH 8.5 from initial pH of 5.5∼5.7. From the C.E.C. measurement by ammonium acetate leaching method, the values of C.E.C. of zeolite and bentonite sample were observed to be 129.7 meq/100 gr and 65.1 meq/100 gr, respectively and Na+ ion accounted for the major part of total C.E.C. in both cases. In the removal of ammonia with zeolite and bentonite, physical adsorption of ammonium ion onto minerals was believed to contribute to the removal of it as well as the intrinsic cation exchange reaction. Finally, zeolite was found to be superior to bentonite in the removal of ammonia from aqueous solutions.
Keywords
ammonia; zeolite; bentonite; cation exchange capacity;
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