Highly inhibited transport of dissolved thallium(I) in manganese oxide-coated sand: Chemical condition effects and retention mechanisms

作     者：Xiaoliu Huangfu Ziqiang Liu Hainan Wang Qiang He Hongxia Liu Caihong Liu Xiaoliu Huangfu;Ziqiang Liu;Hainan Wang;Qiang He;Hongxia Liu;Caihong Liu

作者机构：Key Laboratory of Eco-Environments in Three Gorges Reservoir RegionMinistry of EducationCollege of Environment and EcologyChongqing UniversityChongqing 400044China State Key Laboratory of Pollution Control and Resource ReuseSchool of EnvironmentNanjing UniversityNanjing 210023China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第129卷第7期

页      面：104-114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）] 08[工学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.51878092 and 52070029) 

主　　题：Thallium(I) Manganese oxide-coated sand Transport and retention Adsorption Oxidative precipitation 

摘      要：Thallium contamination in water can cause great danger to the *** this study,we synthesized manganese oxide-coated sand(MOCS)and investigated the transport and retention behaviors of Tl(I)in MOCS under different *** methods combined with a two-site nonequilibrium transport model were applied to explore the *** results showed that Tl(I)mobility was strongly inhibited in MOCS media,and the retention capacity calculated from the fitted model was 510.41 mg/g under neutral *** retention process included adsorption and oxidative precipitation by the manganese oxides coated on the sand *** with the same concentration of Mn(II)led to halving Tl(I)retention due to competition for reactive *** Tl(I)retention was observed under alkaline conditions,as increasing pH promoted electronegativity on the media ***,the competitive cation Ca^(2+)significantly weakened Tl(I)retention by occupying adsorption *** findings provide new insights into understanding Tl(I)transport behavior in water-saturated porous media and suggest that manganese oxide-coated sand can be a cost-effective filter media for treating Tl-contaminated water.