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Iranian Journal of Chemistry and Chemical Engineering، جلد ۲۷، شماره ۲، صفحات ۱۱۱-۱۱۷
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عنوان انگلیسی Ion Exchange Behavior of Zeolites A and P Synthesized Using Natural Clinoptilolite
چکیده انگلیسی مقاله The main goal of this study is to investigate the capability of zeolites A and P synthesized from Iranian natural clinoptilolite for uranium uptak. The removal of uranium(VI) from aqueous solution via ion exchange by zeolites in a single component system with various contact times, temperatures and initial concentrations of uranium(VI) was investigated. The experimental results were fitted to the Langmuir and Dubinin-Radushkevich isotherms to obtain the characteristic parameters of each model. Both the Langmuir and Dubinin-Radushkevich isotherms were found to good represent the measured adsorption data. Using the thermodynamic equilibrium constants obtained at two different temperatures, various thermodynamic parameters, such as ΔG˚, ΔH˚, and ΔS˚ have been calculated. The thermodynamics of uranium(VI) ion and zeolite system indicates the spontaneous and endothermic nature of the process. It was noted that an increase in temperature resulted in a higher uranium loading per unit weight of the adsorbent.
کلیدواژه‌های انگلیسی مقاله Ion exchange,Zeolite A,Zeolite P,Uranyl
نویسندگان مقاله حسین قاسمی mobtaker | ghasemi mobtaker
nuclear science research school, nuclear science and technology research institute nstri , p.o.b. 11365-3486, tehran, i.r. iran

حسین کاظمیان |
nuclear science research school, nuclear science and technology research institute nstri , p.o.b. 11365-3486, tehran, i.r. iran

محمد علی نامدار | mohammad ali
nuclear science research school, nuclear science and technology research institute nstri , p.o.b. 11365-3486, tehran, i.r. iran

علی ملکی نژاد |
nuclear science research school, nuclear science and technology research institute nstri , p.o.b. 11365-3486, tehran, i.r. iran

محمدرضا پاکزاد | mohammad reza
nuclear science research school, nuclear science and technology research institute nstri , p.o.b. 11365-3486, tehran, i.r. iran

نشانی اینترنتی http://www.ijcce.ac.ir/article_7004_fea0715ce4a577f709a39acca373fd2c.pdf
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