Ammonia exchange on clinoptilolite from mineral deposits located in Mexico
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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%25 NaC1 solution was used as the desorbing solution, but more ammonia was desorbed using 1%25 KC1 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. © 2004 Society of Chemical Industry.
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Ammonia; Clinoptilolite; Ion exchange; Natural zeolite Adsorbents; Desorption; Ion exchange; Isotherms; Mineral resources; pH effects; Thermal effects; Clinoptilolite; Ion exchange capacity; Ammonia; ammonia; clinoptilolite; mineral; potassium chloride; sodium chloride; unclassified drug; zeolite; ammonia; ion exchange; zeolite; adsorption; article; batch process; chemical analysis; controlled study; desorption; geographic distribution; ion exchange; isotherm; Mexico; particle size; pH; temperature sensitivity
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