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Modification of Natural Clinoptilolite and its Uptake of NH4+

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Abstract:

Natural clinoptilolite collected from Chicheng of Hebei province in China, was treated with physical modification using sodium/ammonium salts, chemical modification using NaOH or NaAlO2, and physicochemical modification using NaOH or NaAlO2 and NaCl in order, respectively. And its adsorption capacity of NH4+ in different conditions was investigated. The results show that modified clinoptilolite has the same crystal structure, and the clinoptilolite modified with NaOH or NaAlO2 has good uptake of ammonia ion; the concentration of NaAlO2 has apparent influence on the removal of ammonia nitrogen, and the perfect concentration is 0.1 mol/L and the uptake could reach 0.92 mmol/g in the 100 mg/L NH4+ solution; the existence of K+、Na+、Ca2+、Mg2+ decreases the uptake of ammonia ion on clinoptilolite modified with 0.1 mol/L NaAlO2.

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Periodical:

Advanced Materials Research (Volume 178)

Pages:

191-195

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.178.191

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Online since:

December 2010

Authors:

Zhi Yong Ji, Jun Sheng Yuan, Min Su

Keywords:

Ammonia Nitrogen, Clinoptilolite, Modification, Sewage

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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