%0 Journal Article %T Application of response surface methodology for thorium(IV) removal using Amberlite IR-120 and IRA-400: Ion exchange equilibrium and kinetics %J Journal of Particle Science and Technology %I Iranian Research Organization for Science and Technology %Z 2423-4087 %A Zamani souderjani, Ehsan %A Keshtkar, Ali Reza %A Mousavian, Mohammad Ali %D 2017 %\ 06/01/2017 %V 3 %N 2 %P 101-112 %! Application of response surface methodology for thorium(IV) removal using Amberlite IR-120 and IRA-400: Ion exchange equilibrium and kinetics %K Th(IV) Removal %K Response surface methodology %K Central Composite Design %K Ion Exchange Resin %R 10.22104/jpst.2017.2267.1088 %X 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. %U https://jpst.irost.ir/article_600_629e718c47da9451362919cc83fd2a89.pdf