椰壳炭负载FeS复合物高效吸附钍(Ⅳ)的性能OA

Nano coconut shells activated carbon were selected as support materials,and nano FeS/CSC adsorbents were prepared by impregnation method for the adsorption testing of thorium(IV).The adsorbents were characterized and analyzed by SEM,IR,XRD and BET technology.The results indicated that thorium(IV)ions in aqueous solution was adsorbed by nano 6%-FeS/CSC adsorbent effectively,when the removal rate was high as 96.99%and the unit adsorption capacity was high as 116.39 mg/g under the optimized conditions.The characterization analysis of the adsorbent displayed that the nano FeS particles are uniformly distributed on the surface of coconut shell carbon with the large specific surface area.Thorium(IV)were prone to coordinate bonding with the surface nano FeS particles,and the microstructure of the micro surface was unchanged after adsorption.This adsorption process was more suitable to be described using the Freundlich isotherm adsorption model,and the adsorption rate was conformed to the second order kinetic model.The obvious chemical adsorption characteristics was shown.Thermodynamic experiments elucidated that this behavior showed the feature as endothermic,entropy increasing,and spontaneous.