Efficient removal of Cs^(+)and Sr^(2+)ions by the sustainable biomass composite membrane of K_(2x)Sn_(4-x)S_(8-x)/collagen fibers  

作　　者：Jianghai HE Yingying ZHAO Lu YANG Haiyan SUN Meiling FENG Xiaoying HUANG 

机构地区：[1]College of Chemistry,Fuzhou University,Fuzhou 350116,China [2]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [3]Fujian College,University of Chinese Academy of Sciences,Fuzhou 350002,China [4]Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy System,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China

出　　处：《Science China(Technological Sciences)》2025年第4期222-232,共11页中国科学(技术科学英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.U21A20296,22325605,22076185,22406185);the Natural Science Foundation of Fujian Province(Grant No.2020J06033)。

摘　　要：The rapid,efficient,and convenient removal of hazardous radionuclides^(137)Cs and^(90)Sr is an urgent need in the remediation of environmental radioactive contamination.Herein,a biomass composite membrane of K_(2x)Sn_(4-x)S_(8-x)/collagen fibers(KTS-3/CFs)was obtained by successfully loading the metal sulfide ion exchanger of K_(2x)Sn_(4-x)S_(8-x)(KTS-3)on CFs through the principle of fiber papermaking.The membrane is characterized by a homogeneous shape,operability,good water stability,and easy degradation.It exhibits satisfactory capability for removing Cs^(+)and Sr^(2+)ions,achieving maximum adsorption capacities of 82.34 mg/g for Cs^(+)and 32.98 mg/g for Sr^(2+),respectively.Meanwhile,the KTS-3/CFs membrane has fast kinetic performance and a wide pH activity range for removing Cs^(+)and Sr^(2+)ions.Further,it can still efficiently capture Cs^(+)and Sr^(2+)ions under the coexistence of K^(+),Na^(+),Ca^(2+),and Mg^(2+)ions,and even in actual water samples.The removal of Cs^(+)and Sr^(2+)ions by the KTS-3/CFs is mainly attributed to the ion exchange of Cs^(+)and Sr^(2+)with K^(+)in the interlayer spaces of KTS-3,while the CFs act as the support material for the formation of the membrane.Moreover,the KTS-3/CFs composite membrane is also capable of the fast and efficient capture of Cs^(+)and Sr^(2+)ions in a continuous filtration manner.This work not only develops an environmentally friendly,convenient,and accessible method for the preparation of metal sulfide composites but also paves the way for the development of new high-efficiency composite materials for radionuclides remediation.

关 键 词：CESIUM STRONTIUM composite membrane metal sulfide collagen fibers 

分 类 号：X591[环境科学与工程—环境工程]