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  4. 中国科学院矿物学与成矿学重点实验室
Transport dynamics of rare earth elements in weathering crust soils

文献类型：期刊论文

作者Kang, Shichang1,2,5; Ling, Bowen1,3,4; Wang, Gaofeng2,5; Xu, Yongjin1,2,5; Xu, Jie1,2,5; Liang, Xiaoliang1,2,5; Wei, Jingming1,2,5; Tan, Wei1,2,5; Ma, Lingya1,2,5; Zhu, Jianxi1,2,5
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2024-06-20
卷号930页码:10
关键词Rare earth elements Transport dynamics Weathering crust Advection-diffusion-adsorption equation Isotherm
ISSN号0048-9697
DOI10.1016/j.scitotenv.2024.172843
英文摘要In modern industries, rare earth elements (REEs) are considered as essential metals and invaluable natural resources. Ion -adsorption deposits (IADs) are repositories of REE in the weathering crust soils, in which REEs are adsorbed on clay minerals. In the last few decades, the mining of REEs from IADs has caused substantial environmental damage owing to the overuse of leaching agents for the desorption and transport of REEs in weathering crust soils. These environmental issues have sparked extensive research interest in modeling REE transport dynamics in weathering crust soils. Nevertheless, because current models treat REE adsorption and transport independently, they do not accurately describe REE transport dynamics. Therefore, in this study, a unified workflow that synergizes adsorption and transport dynamics is proposed to predict REE transport. The adsorption of REEs on IADs was found to follow the Freundlich isotherm with the coefficient of determination exceeding 0.9826. The adsorption capacities of La 3+ , Sm 3+ , Er 3+ , and Y 3+ reach 1.3127, 1.4423, 1.5793, and 1.1061 mg g -1 at 300 ppm, respectively. For the breakthrough curve, an advection - dispersion - adsorption - eq- uation (ADAE) model was developed and utilized to accurately and reliably predict REE transport dynamics in soil columns. It was found the saturation time of REEs in soils is 39.22, 44.15, 50.64, and 32.17 h, respectively at 2 mL min -1 and decreased with the increase of flow velocity. The upper and lower limits of REE transport are ADAE-Freundlich and ADAE-Toth. More importantly, the model was applied to simulate REEs transport in fieldscale weathering crusts over 100 years and predict REE accumulation in the highly weathered layered, which is found in natural weathering crusts. The qualitative prediction of REE transport dynamics in weathering crusts may help fundamentally lower the usage of leaching agents and mitigate concomitant the environmental impacts of mining.
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001238921400001
源URL[http://ir.gig.ac.cn/handle/344008/78474]  
专题中国科学院矿物学与成矿学重点实验室
通讯作者Wang, Gaofeng
作者单位1.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China
5.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Kang, Shichang,Ling, Bowen,Wang, Gaofeng,et al. Transport dynamics of rare earth elements in weathering crust soils[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,930:10.
APA Kang, Shichang.,Ling, Bowen.,Wang, Gaofeng.,Xu, Yongjin.,Xu, Jie.,...&He, Hongping.(2024).Transport dynamics of rare earth elements in weathering crust soils.SCIENCE OF THE TOTAL ENVIRONMENT,930,10.
MLA Kang, Shichang,et al."Transport dynamics of rare earth elements in weathering crust soils".SCIENCE OF THE TOTAL ENVIRONMENT 930(2024):10.

入库方式： OAI收割

来源：广州地球化学研究所

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