干旱区生态环境知识资源中心(Arid): Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria)

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DOI	10.1016/j.apgeochem.2019.05.005
	Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria)
	Benabdelkader, A.1,2; Taleb, A.2; Probst, J. L.1; Belaidi, N.2; Probst, A.1
通讯作者	Probst, A.
来源期刊	APPLIED GEOCHEMISTRY
ISSN	0883-2927
出版年	2019
卷号	106 页码:96-111
英文摘要	The behaviour and sources of rare earth elements (REE) in river sediments were investigated at ten stations and two dams of the Tafna basin (Northern Algeria) during contrasting hydrological conditions and using a combination of normalisation procedures, REE anomalies, various REE ratios, and multivariate statistical analysis. The ranking and REE concentrations were in the range of other carbonated areas. The classical fractionation of the heavy REE(HREE) erosion pattern, evidenced from upstream to downstream by the La/Yb or Sm/Yb ratios, was disturbed by the presence of dams, which retained the light REE (LREE) in particular. The hydrological conditions, particle size, and geochemical characteristics controlled the REE patterns. The LREE were associated with clay minerals and HREE with coarse silts, whereas carbonate and particulate organic carbon (POC) did not influence the transport downstream. The total concentration of REE in sediments was not strongly affected by anthropogenic inputs from various sources (industrial activities, and domestic or medical wastes). Indeed, some LREE enrichment and anomalies were detected at a few stations and locally for Gd, Tb, and Yb. However, the anthropogenic contribution can partially be hidden by dilution due to particle erosion. High flow increased the LREE and MREE enrichment and LREE/HREE fractionation in some places due to erosion processes and anthropic influences (dam releases and local wastes inputs). Middle REE (MREE) and HREE were the most extractable elements unlike LREE (which are the most concentrated), particularly during high water conditions. Finally, the REE demonstrated the impact of natural processes (hydrological, geochemical, and physical) and some anthropogenic disturbances (waste inputs, fertilisers, and dams). This might inspire to develop such investigations in other similar semi-arid basins undergoing various pressures. The use of local bedrock as a reference and a set of geochemical and statistical tools, is recommended.
英文关键词	Rare earth elements Bottom sediments Hydrological conditions Dams Erosion Contamination
类型	Article
语种	英语
国家	France ; Algeria
开放获取类型	Green Published, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000470085700010
WOS关键词	TRACE-ELEMENTS ; ANTHROPOGENIC GADOLINIUM ; FLUVIAL SEDIMENTS ; BOHAI BAY ; GEOCHEMICAL BEHAVIOR ; CHEMICAL-COMPOSITION ; ESTUARINE SEDIMENTS ; STABILITY-CONSTANTS ; SURFACE SEDIMENTS ; REE GEOCHEMISTRY
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214257
作者单位	1.Univ Toulouse, EcoLab, CNRS, Toulouse, France; 2.Univ Tlemcen, LEcGEN, Tilimsen, Algeria
推荐引用方式 GB/T 7714	Benabdelkader, A.,Taleb, A.,Probst, J. L.,et al. Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria)[J],2019,106:96-111.
APA	Benabdelkader, A.,Taleb, A.,Probst, J. L.,Belaidi, N.,&Probst, A..(2019).Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria).APPLIED GEOCHEMISTRY,106,96-111.
MLA	Benabdelkader, A.,et al."Origin, distribution, and behaviour of rare earth elements in river bed sediments from a carbonate semi-arid basin (Tafna River, Algeria)".APPLIED GEOCHEMISTRY 106(2019):96-111.