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Ammonia exchange on clinoptilolite from mineral deposits located in Mexico
Author(s) -
LeyvaRamos Roberto,
AguilarArmenta Gelacio,
GonzalezGutierrez Linda V,
GuerreroCoronado Rosa M,
MendozaBarron Jovita
Publication year - 2004
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1035
Subject(s) - clinoptilolite , cation exchange capacity , ammonia , ion exchange , zeolite , chemistry , desorption , inorganic chemistry , mineral , ion , adsorption , catalysis , organic chemistry , geology , soil science , soil water
This work investigated the ion exchange of ammonia on clinoptilolite obtained from mineral deposits located in San Luis Potosi and Sonora, Mexico. Experimental ion exchange isotherm data were obtained in a batch adsorber. The effects of temperature and solution pH on the ion exchange capacity were studied and it was found that the exchange capacity was slightly increased by augmenting the temperature and by decreasing the pH from 6 to 3. The ion exchange capacity was independent of the diameter of the zeolite particles. The reversibility of ion exchange was analyzed by desorbing the ammonia exchanged on the zeolite. The ion exchange was reversible when 1% NaCl solution was used as the desorbing solution, but more ammonia was desorbed using 1% KCl solution in the desorption step. It was concluded that a considerable amount of ammonia was exchanged on the clinoptilolite and that the exchange capacity was slightly dependent on the temperature and pH. Copyright © 2004 Society of Chemical Industry