气候变化领域集成服务门户(CCPortal): Heavy metals in sediments of the Yarlung Tsangbo and its connection with the arsenic problem in the Ganges-Brahmaputra Basin

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DOI	10.1007/s10653-010-9311-0
	Heavy metals in sediments of the Yarlung Tsangbo and its connection with the arsenic problem in the Ganges-Brahmaputra Basin
	Li, Chaoliu; Kang, Shichang; Zhang, Qianggong; Gao, Shaopeng; Sharma, Chhatra Mani
发表日期	2011
ISSN	0269-4042
EISSN	1573-2983
卷号	33 期号:1
英文摘要	The Yarlung Tsangbo (YT) is a large river running across southern Tibet and has significant effects on its lower reaches, the Ganges-Brahmaputra Basin. In order to investigate the geochemical features of the YT, 18 surface sediment samples were collected; ten trace element concentrations were measured for bulk sediments and two fine grain size fractions. Meanwhile, basic physicochemical parameters and element concentrations of river water were also analyzed. Results indicated that the river water was alkaline (pH 8.42) and that dissolved oxygen was mainly controlled by river water temperature. Some elements (e.g., Zn and Ni) showed close negative relationship to mean grain size of the sediments. Concentrations of most heavy metals, except As of the YT bulk sediments, were similar to those of Upper Crustal Concentration and its lower reaches, indicating almost no anthropogenic impact. Arsenic of the YT sediments was derived fundamentally from the parent rocks of the YT Basin and was far higher than that of its lower reaches. This indicates that relatively small amounts of As from the study area were transported down to the Brahmaputra River under present, relatively dry climatic conditions. However, more YT sediments might have been transported to its low reaches during the Holocene due to the wet climate, giving high As concentration in Holocene sediments of the Ganges-Brahmaputra Basin. Thus, As transported by the YT may produce important influence on the Ganges-Brahmaputra Basin and contribute to its high As concentration in groundwater.
关键词	Yarlung Tsangbo Arsenic Metals Baseline concentration River sediments
学科领域	Engineering; Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Water Resources
语种	英语
WOS研究方向	Engineering, Environmental ; Environmental Sciences ; Public, Environmental & Occupational Health ; Water Resources
来源期刊	ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111617
作者单位	Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,et al. Heavy metals in sediments of the Yarlung Tsangbo and its connection with the arsenic problem in the Ganges-Brahmaputra Basin[J]. 中国科学院西北生态环境资源研究院,2011,33(1).
APA	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,Gao, Shaopeng,&Sharma, Chhatra Mani.(2011).Heavy metals in sediments of the Yarlung Tsangbo and its connection with the arsenic problem in the Ganges-Brahmaputra Basin.ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,33(1).
MLA	Li, Chaoliu,et al."Heavy metals in sediments of the Yarlung Tsangbo and its connection with the arsenic problem in the Ganges-Brahmaputra Basin".ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 33.1(2011).