Application of response surface methodology for thorium(IV) removal using Amberlite IR-120 and IRA-400 : Ion exchange equilibrium and kinetics
محل انتشار: فصلنامه علوم و فناوری ذرات، دوره: 3، شماره: 2
سال انتشار: 1396
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 378
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شناسه ملی سند علمی:
JR_JPST-3-2_005
تاریخ نمایه سازی: 26 فروردین 1397
چکیده مقاله:
In this work, thorium(IV) removal from aqueous solutions was investigated in batch systems of cationic and anionic resins of Amberlite IR-120 and IRA-400. In this way, the effects of pH, initial Th(IV) concentration and the amount of adsorbent were investigated. A Central composite design (CCD) under response surface methodology (RSM) was employed to determine the optimized condition. The results showed that the maximum removal efficiency of Th(IV) onto IR-120 and IRA-400 either discretely or in combination, albeit with equal mass fraction, was determined as follows: 98.09% , 65.70% and 72.19% at pH=3.23, 6 and 4.07, initial Th(IV) concentration of 78.2,30 and 55.4 mg.L-1 and 2.08, 2.5 and 2.2 g.L-1 of resin, respectively. The kinetic and equilibrium data were accurately described by the pseudo-second order and Langmuir models. The results showed that IR-120 is a suitable adsorbent for thorium removal from aqueous solutions
کلیدواژه ها:
Th(IV) removal ، Response surface methodology (RSM) ، Central composite design ، Ion exchange resin ، ،
نویسندگان
Ehsan Zamani Souderjani
Department of Chemical Engineering, Collage of Engineering, University of Tehran, Tehran, Iran
Ali Reza Keshtkar
Nuclear Fuel Cycle School, Nuclear Science and Technology Research Institute, Tehran, Iran
Mohammad Ali Mousavian
Department of Chemical Engineering, Collage of Engineering, University of Tehran, Tehran, Iran