燕山大学学报2025，Vol.49Issue(3)：272-282,11.DOI:10.3969/j.issn.1007-791X.2025.03.009
地质聚合物微球对水中微量铯的吸附性能研究
Adsorption performance of geopolymer microspheres toward trace cesium in aqueous solutions
摘要
Abstract
The efficient adsorption and separation of trace cesium from wastewater remain a key challenge in radioactive wastewater treatment.In this study,geopolymer microspheres were developed to address the issues of poor selectivity and slow kinetics in trace cesium adsorption.Geopolymer microspheres were synthesized via a suspension-solidification method,with the morphology,pore structure,and adsorption mechanisms characterized by SEM-EDS,BET,and XPS.Static and dynamic adsorption experiments were conducted to evaluate Cs+removal performance.Results showed that the geopolymer microspheres exhibited regular spherical geometry(700～800 μm diameter)with a meso-macroporous composite structure(average pore size 12.63 nm).Geopolymer microspheres maintained stable adsorption performance for 10 mg·L-1 Cs+across pH 3～9,achieving removal efficiencies of 61.8%～70.7%.Even at a Na+/Cs+molar ratio of 64,the geopolymer microspheres retained 20.4%adsorption efficiency,with dynamic experiments demonstrating a treatment capacity of 1 400 kg wastewater per kilogram of geopolymer microspheres.The adsorption process followed the Langmuir isothermal model and pseudo-second-order kinetics models,reaching equilibrium within 30 min.XPS analysis revealed new peaks in the high binding energy region of Al 2p spectrum after Cs+adsorption,confirming specific coordination between Cs+and Al—O sites.These findings demonstrate the capability of geopolymer microspheres for efficient trace Cs+capture,with the rapid kinetics and selective adsorption performance providing a promising strategy for radioactive wastewater remediation.关键词
地质聚合物微球/铯/吸附/吸附动力学/选择性Key words
geopolymer microspheres/cesium/adsorption/adsorption kinetics/selectivity分类
化学化工引用本文复制引用
宋金山,张琳妍,慕典典,徐乐瑾,孙奇娜..地质聚合物微球对水中微量铯的吸附性能研究[J].燕山大学学报,2025,49(3):272-282,11.基金项目
中央引导地方科技发展资金资助项目(236Z4107G) （236Z4107G）
河北省自然科学基金资助项目(E2024318030) （E2024318030）
河北省燕赵黄金台聚才计划资助项目(A20240011) （A20240011）
国家自然科学基金资助项目(22176067) （22176067）
