环境修复
水溶液
放射性核素
吸附
水溶液中的金属离子
化学
离子
溶解度
放射性废物
金属
放射化学
核化学
化学工程
污染
物理化学
有机化学
生态学
物理
量子力学
工程类
生物
作者
Yanmin Zou,Wen Ma,Hai‐Yan Sun,Jun-Hao Tang,Tian‐Tian Lv,Mei‐Ling Feng,Xiao‐Ying Huang
标识
DOI:10.1016/j.jhazmat.2022.128869
摘要
Radiocesium remediation is of great significance for the sustainable development of nuclear energy and ecological protection. It is very challenging for the effective recovery of 137Cs from aqueous solutions due to its strong radioactivity, solubility and mobility. Herein, the efficient recovery of Cs+ ions has been achieved by three layered vanadyl oxalatophosphates, namely (NH4)2[(VO)2(HPO4)2C2O4]·5 H2O (NVPC), Na2[(VO)2(HPO4)2C2O4]·2 H2O (SVPC), and K2.5[(VO)2(HPO4)1.5(PO4)0.5(C2O4)]·4.5 H2O (KVPC). NVPC exhibits the ultra-fast kinetics (within 5 min) and high adsorption capacity for Cs+ (qmCs = 471.58 mg/g). It also holds broad pH durability and excellent radiation stability. Impressively, the entry of Cs+ can be directly visualized by the single-crystal structural analysis, and thus the underlying mechanism of Cs+ capture by NVPC from aqueous solutions has been illuminated at the molecular level. This is a pioneering work in the removal of radioactive ions by metal oxalatophosphate materials which highlights the great potential of metal oxalatophosphates for radionuclide remediation.
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