Molecules | |
Proton Adsorption Selectivity of Zeolites in Aqueous Media: Effect of Si/Al Ratio of Zeolites | |
Moses Wazingwa Munthali1  Mohammed Abdalla Elsheikh2  Erni Johan1  Naoto Matsue1  | |
[1]Department of Life Environmental Conservation, Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan | |
[2] E-Mails: | |
[3]Department of Soil and Environment Sciences, Faculty of Agriculture, University of Khartoum, Shambat, P.O. Box 32, Khartoum North 13314, Sudan | |
[4] E-Mail: | |
关键词: zeolite; Si/Al ratio; negative charge density; H+ selectivity; cation adsorption; | |
DOI : 10.3390/molecules191220468 | |
来源: mdpi | |
【 摘 要 】
In addition to their well-known uses as catalysts, zeolites are utilized to adsorb and remove various cations from aqueous system. The adsorption of the cations is ascribed to the negative charge of zeolites derived from isomorphous substitution of Si by Al. The amount of Na+ adsorption on 4A, X, Y, Na-P1 and mordenite type zeolites were determined in aqueous media, in a two-cation (Na+ and H+) system. Although each zeolite has a constant amount of negative charge, the amount of Na+ adsorption of each zeolite decreased drastically at low pH−pNa values, where pH−pNa is equal to log{(Na+)/(H+)}. By using the plot of the amount of Na+ adsorption
【 授权许可】
CC BY
© 2014 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
Files | Size | Format | View |
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RO202003190019176ZK.pdf | 1243KB | download |