干旱区生态环境知识资源中心(Arid): Baseline determination, pollution source and ecological risk of heavy metals in surface sediments of the Amu Darya Basin, Central Asia

Arid

DOI	10.1007/s11442-022-2051-0
	Baseline determination, pollution source and ecological risk of heavy metals in surface sediments of the Amu Darya Basin, Central Asia
	Zhan Shuie; Wu Jinglu; Jin Miao; Zhang Hongliang
通讯作者	Wu, JL
来源期刊	JOURNAL OF GEOGRAPHICAL SCIENCES
ISSN	1009-637X
EISSN	1861-9568
出版年	2022
卷号	32 期号:11 页码:2349-2364
英文摘要	Central Asia (CA) is one of the most fragile regions worldwide owing to arid climate and accumulated human activities, and is a global hotspot due to gradually deteriorating ecological environment. The Amu Darya Basin (ADB), as the most economically and demographically important region in CA, is of particular concern. To determine the concentration, source and pollution status of heavy metals (HMs) in surface sediments of the ADB, 154 samples were collected and analyzed for metals across the basin. Correlation and cluster analysis, and positive matrix factorization model were implemented to understand metals' association and apportion their possible sources. Cumulative frequency distribution and normalization methods were used to determine the geochemical baseline values (GBVs). Then, various pollution indices and ecological risk index were employed to characterize and evaluate the pollution levels and associated risks based on the GBVs. Results indicated that the mean concentrations of HMs showed the following descending order in the surface sediments of ADB: Zn > Cr > Ni > Cu > Pb > Co > Cd. The spatial distribution maps showed that Cr, Ni, and Cu had relatively high enrichment in the irrigated agricultural area; high abundances of Zn, Pb, and Cd were mainly found in the urban areas. Four source factors were identified for these metals, namely natural sources, industrial discharge, agricultural activities, and mixed source of traffic and mining activities, accounting for 33.5%, 11.4%, 34.2%, and 20.9% of the total contribution, respectively. The GBVs of Cd, Zn, Pb, Cu, Ni, Cr, and Co in the ADB were 0.27, 58.9, 14.6, 20.3, 25.8, 53.4, and 9.80 mg/kg, respectively, which were similar to the regional background values obtained from lake sediments in the bottom. In general, the assessment results revealed that surface sediments of the ADB were moderately polluted and low ecological risk by HMs.
英文关键词	heavy metal spatial distribution source identification geochemical baseline value risk assessment Amu Darya Basin
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000880339400012
WOS关键词	SOILS ; RIVER ; CONTAMINATION ; LAND ; DESERTIFICATION ; ELEMENTS ; LAKE
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393454
推荐引用方式 GB/T 7714	Zhan Shuie,Wu Jinglu,Jin Miao,et al. Baseline determination, pollution source and ecological risk of heavy metals in surface sediments of the Amu Darya Basin, Central Asia[J],2022,32(11):2349-2364.
APA	Zhan Shuie,Wu Jinglu,Jin Miao,&Zhang Hongliang.(2022).Baseline determination, pollution source and ecological risk of heavy metals in surface sediments of the Amu Darya Basin, Central Asia.JOURNAL OF GEOGRAPHICAL SCIENCES,32(11),2349-2364.
MLA	Zhan Shuie,et al."Baseline determination, pollution source and ecological risk of heavy metals in surface sediments of the Amu Darya Basin, Central Asia".JOURNAL OF GEOGRAPHICAL SCIENCES 32.11(2022):2349-2364.