物理化学学报2025，Vol.41Issue(9)：61-72,12.DOI:10.1016/j.actphy.2025.100097
利用碳纳米管分散的亚铁氰化锌钾电极选择性电吸附高盐放射性废水中的铯(I)
Selective electrosorption of Cs(I)from high-salinity radioactive wastewater using CNT-interspersed potassium zinc ferrocyanide electrodes
摘要
Abstract
The management of 137Cs-containing radioactive wastewater from the Fukushima nuclear accident(FNA)has garnered significant attention due to the challenge of its safe disposal.The presence of co-existing Na⁺ ions severely impedes Cs+removal,exacerbating the costs associated with radioactive wastewater treatment.Recently,capacitive deionization(CDI)technology has demonstrated significant potential in this field.However,its application is limited by the lack of suitable electrode materials that exhibit high Cs+selectivity.In this study,we developed a composite of carbon nanotubes(CNT)interspersed potassium zinc ferrocyanide(KZnFC-CNT),which was pre-activated via an electrochemical method,to serve as a CDI cathode for the selective electrosorption of Cs+ions from saline radioactive wastewater.The KZnFC-CNT electrodes exhibited a maximum electrosorption capacity of 392.75 mg·g-1,with the highest electrosorption rate of 11.21 mg·g-1·min-1.Furthermore,these electrodes exhibited remarkable selectivity,achieving a selectivity factor of 138.2 for Cs+over Na+in a Na+:Cs+molar ratio of 100:1.X-ray diffraction,electrochemical analysis,and theoretical simulations revealed that the selective electrosorption of Cs+is primarily governed by the ion exchange process between Cs+and Na+ions,as well as lattice phase transformations in KZnFC.This study presents an effective approach for the treatment of cesium-containing radioactive wastewater with high salinity.关键词
电容去离子/选择性铯电吸附/亚铁氰化锌/放射性废水/相变Key words
Capacitive deionization/Selective cesium electrosorption/Zinc ferrocyanide/Radioactive wastewater/Phase transformation分类
化学化工引用本文复制引用
项书宏,杨旅,徐应生,曹国新,周宏建..利用碳纳米管分散的亚铁氰化锌钾电极选择性电吸附高盐放射性废水中的铯(I)[J].物理化学学报,2025,41(9):61-72,12.基金项目
The project was supported by the National Key R&D Program of China(2022YFC2904303),the National Natural Science Foundation of China(92463309,52400078),the Key Research and Development Projects of Anhui Province,China(202426j16020001),Natural Science Foundation of Hubei Province,China(2024AFB104),and the HFIPS Director's Fund,China(YZJJ-GGZX-2022-01). 国家重点研发计划(2022YFC2904303),国家自然科学基金(92463309,52400078),安徽省重点研发项目(202426j16020001),湖北省自然科学基金(2024AFB104)及中国科学院合肥物质科学研究院院长基金(YZJJ-GGZX-2022-01)资助 （2022YFC2904303）
