Rare earth elements (REE) of dissolved and suspended loads in the Xijiang River, South China

doi:10.1016/j.apgeochem.2009.06.001

	Rare earth elements (REE) of dissolved and suspended loads in the Xijiang River, South China
	Xu, Zhifang 1; Han, Guilin 2
刊名	APPLIED GEOCHEMISTRY
	2009-09-01
卷号	24 期号:9 页码:1803-1816
ISSN号	0883-2927
DOI	10.1016/j.apgeochem.2009.06.001
文献子类	Article
英文摘要	The Xijiang River is the main channel of the Zhujiang (Pearl River), the second largest river in China in terms of water discharge, and flows through one of the largest carbonate provinces in the world. The rare earth element (REE) concentrations of the dissolved load and the suspended particulate matter (SPM) load were measured in the Xijiang River system during the high-flow season. The low dissolved REE concentration in the Xijiang River is attributed to the interaction of high pH and low DOC concentration. The PAAS-normalized REE patterns for the dissolved load show some common features: negative Ce anomaly, progressively heavy REE (HREE) enrichment relative to light REE (LREE). Similar to the world's major rivers the absolute concentration of the dissolved REE in the Xijiang River are mainly pH controlled. The degree of REE partitioning between the dissolved load and SPM load is also strongly pH dependent. The negative Ce anomaly is progressively developed with increasing pH, being consistent with the oxidation of Ce (III) to Ce (IV) in the alkaline river waters, and the lack of Ce anomalies in several DOC-rich waters is presumably due to both Ce (III) and Ce (IV) being strongly bound by organic matter. The PAAS-normalized REE patterns for the dissolved load and the SPM load in rivers draining the carbonate rock area exhibit middle REE (MREE) enrichment and a distinct maximum at Eu, indicating the preferential dissolution of phosphatic minerals during weathering of host lithologies. Compared to the Xijiang River waters, the MREE enrichment with a maximum at Eu disappeared and light REE were more depleted in the South China Sea (SCS) waters, suggesting that the REE sourced from the Xijiang River must be further fractionated and modified on entering the SCS. The river fluxes of individual dissolved REE introduced by the Xijiang River into the SCS vary from 0.04 to 4.36 x 10(4) mol a(-1). (C) 2009 Elsevier Ltd. All rights reserved.
WOS关键词	PLASMA MASS-SPECTROMETRY ; ANTHROPOGENIC GADOLINIUM ; COLLOIDAL PARTICLES ; SOLVENT-EXTRACTION ; BACK-EXTRACTION ; TRACE-ELEMENTS ; BOREAL RIVER ; CONGO BASIN ; WATERS ; FRACTIONATION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000270644900019
资助机构	National Basic Research Program of China(2006CB403205) ; National Basic Research Program of China(2006CB403205) ; Chinese National Natural Science Foundation(40773077 ; Chinese National Natural Science Foundation(40773077 ; 40703028) ; 40703028) ; National Basic Research Program of China(2006CB403205) ; National Basic Research Program of China(2006CB403205) ; Chinese National Natural Science Foundation(40773077 ; Chinese National Natural Science Foundation(40773077 ; 40703028) ; 40703028) ; National Basic Research Program of China(2006CB403205) ; National Basic Research Program of China(2006CB403205) ; Chinese National Natural Science Foundation(40773077 ; Chinese National Natural Science Foundation(40773077 ; 40703028) ; 40703028) ; National Basic Research Program of China(2006CB403205) ; National Basic Research Program of China(2006CB403205) ; Chinese National Natural Science Foundation(40773077 ; Chinese National Natural Science Foundation(40773077 ; 40703028) ; 40703028)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71776]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu, Zhifang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Engn Geomech, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhifang,Han, Guilin. Rare earth elements (REE) of dissolved and suspended loads in the Xijiang River, South China[J]. APPLIED GEOCHEMISTRY,2009,24(9):1803-1816.
APA	Xu, Zhifang,&Han, Guilin.(2009).Rare earth elements (REE) of dissolved and suspended loads in the Xijiang River, South China.APPLIED GEOCHEMISTRY,24(9),1803-1816.
MLA	Xu, Zhifang,et al."Rare earth elements (REE) of dissolved and suspended loads in the Xijiang River, South China".APPLIED GEOCHEMISTRY 24.9(2009):1803-1816.