The uptake of europium by reduced graphene oxide-supported nanoscale zerovalent iron investigated by batch and modeling techniques
作者： Hongjie Zhu , Huiyi Gao , Xiaoming Huang , Weifang Kong , Xiaoming Yan
DOI: 10.1016/J.JECE.2015.10.014
关键词:
摘要: The reduced graphene oxide-supported nanoscale zerovalent iron (NZVI@rGO) composites were synthesized towards the uptake of europium (Eu(III)) in environmental cleanup. In this study, effect factors on Eu(III) from aqueous solutions NZVI@rGO was investigated under ambient conditions by batch techniques. kinetics indicated that can be satisfactorily fitted pseudo-second order kinetic model. independent ionic strength at pH > 5.0, indicating inner-sphere surface complexation dominated composites. It is demonstrated maximum capacities for calculated Langmuir models 96.675 mg/g 5.0 and T = 293 K. thermodynamic parameters an endothermic spontaneous process. Based modeling, diffuse layer model gave excellent fits to with cation exchange complexes (X3Eu species) 7.0, respectively. results considered as a promising adsorbent trivalent radionuclides wastewaters
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