Sulfhydryl-modified zeolite A with exceptional strontium adsorption selectivity

作     者：Lingyi Li Lanxing Ren Dong Wang Junchang Chen Qi Guo Yuting Zhao Fuqiang Zhao Linwei He Jie Li Wenqi Zhang Lijuan Song Long Chen Lixi Chen Bin Wang Lin Zhu Tao Duan Zhifang Chai Shuao Wang 

作者机构：State Key Laboratory of Radiation Medicine and ProtectionSchool for Radiological and Interdisciplinary Sciences (RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow University School of ScienceHarbin Institute of Technology (Shenzhen) School of Chemistry and Chemical EngineeringHunan Province Key Laboratory for the Design and Application of Actinide ComplexesUniversity of South China Radioactive Waste Technology and Radiochemistry Research DepartmentChina Nuclear Power Technology Research Institute Co.Ltd. State Key Laboratory of Environment-Friendly Energy MaterialsSchool of National Defence Science & TechnologySouthwest University of Science and Technology 

出 版 物：《Science China Chemistry》 (中国科学:化学(英文版))

年 卷 期：2025年第68卷第5期

页      面：1847-1858页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China (22425061, 22176139, 22203023, 22206144, 22306136, U2267222, and U1967217) the Natural Science Foundation of Guangdong Province (2022A1515011859) the Postdoctoral Science Foundation of China (BX20230252, 2023M742538) the Natural Science Foundation of Jiangsu Province (BK20230510) the Open Project of State Key Laboratory of Environment-friendly Energy Materials (22kfhg02) the New Cornerstone Science Foundation through the XPLORER PRIZE 

主　　题：strontium selectivity adsorption seawater sulfhydryl NaA zeolite 

摘      要：Efficient removal of trace radiostrontium from contaminated highly saline wastewater,such as seawater,remains a critical but challenging task due to the coexistence of large excess of hard cations like Na+,K+,Mg2+and particularly Ca2+,which shares similar physicochemical properties with Sr2+.Herein,we successfully boosted the selectivity by a sulfhydryl-functionalized NaA zeolite（SH-NaA） via ion exchange coupled with reinforced soft-soft interactions between sulfhydryl groups and Sr2+.Remarkably,SH-NaA achieved a 99.8%removal efficiency of Sr2+in the presence of a tenfold excess of Ca2+,with a distribution coefficient（Kd） of 4.98×10～5mL/*** effectiveness of SH-NaA in accurately capturing Sr2+was further validated by its superior dynamic adsorption performance in natural seawater compared to pristine NaA *** experiments highlighted SH-NaA’s exceptional Sr2+removal efficiency（qm=233.36 mg/g）,rapid adsorption kinetics（1 min）,superior decontamination depth（Kd=6.71×10～5mL/g）,and robust irradiation stability（400 kGy γ-ray）.X-ray photoelectron spectroscopy（XPS） and in situ Fouriertransform infrared（FTIR） analyses underscored the pivotal role of sulfhydryl groups in Sr2+*** functional theory（DFT） calculations revealed that the sulfhydryl-functionalized NaA zeolite exhibits the best selectivity toward Sr2+,with an interaction energy of-2.55 *** findings demonstrate that organic group functionalized zeolites hold significant promise for environmental remediation applications.