Transport dynamics of rare earth elements in weathering crust soils

doi:10.1016/j.scitotenv.2024.172843

IMECH-IR > 流固耦合系统力学重点实验室

	Transport dynamics of rare earth elements in weathering crust soils
	Kang, Shichang; Ling BW(凌博闻); Wang, Gaofeng; Xu, Yongjin; Xu, Jie; Liang, Xiaoliang; Wei, Jingming; Tan, Wei; Ma, Lingya; Zhu, Jianxi; He, Hongping
通讯作者	Wang, Gaofeng([email protected])
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
	2024-06-20
卷号	930 页码:10
ISSN	0048-9697
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.
关键词	Rare earth elements Transport dynamics Weathering crust Advection-diffusion-adsorption equation Isotherm
DOI	10.1016/j.scitotenv.2024.172843
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001238921400001
关键词[WOS]	FIXED-BED COLUMN ; METHYLENE-BLUE ; ADSORPTION ; REMOVAL ; SORPTION ; BEHAVIOR ; MODELS ; WATER ; EQUILIBRIUM ; KAOLINITE
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
资助项目	National Natural Science Foundation of China[42022012] ; National Natural Science Foundation of China[42102037] ; National Natural Science Foundation of China[42272158] ; National Key Research and Development Program of China[2021YFC2901701] ; Guangdong Major Project of Basic and Applied Basic Research[2019B030302013] ; Guangdong Basic and Applied Basic Research Foundation[2023A1515012927] ; Guangdong Special Support Program[2019TX05L169] ; Science and Technology Planning of Guangdong Province, China[2020B1212060055]
项目资助者	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Guangdong Major Project of Basic and Applied Basic Research ; Guangdong Basic and Applied Basic Research Foundation ; Guangdong Special Support Program ; Science and Technology Planning of Guangdong Province, China
论文分区	一类
力学所作者排名	2
RpAuthor	Wang, Gaofeng
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/95588
专题	流固耦合系统力学重点实验室
推荐引用方式 GB/T 7714	Kang, Shichang,Ling BW,Wang, Gaofeng,et al. Transport dynamics of rare earth elements in weathering crust soils[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,930:10.Rp_Au:Wang, Gaofeng
APA	Kang, Shichang.,凌博闻.,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.