Distribution characteristics, sources identification and risk assessment of n-alkanes and heavymetals in surface sediments, Tajikistan, Central Asia

doi:10.1016/j.scitotenv.2019.136278

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	Distribution characteristics, sources identification and risk assessment of n-alkanes and heavymetals in surface sediments, Tajikistan, Central Asia
	Zhan, Shuie 1,3,4; Wu, Jinglu 1,4; Wang, Jingzhong 2,4,5; Jing, Miao 1,4
通讯作者	Wu, Jinglu(w.jinglu@niglas.ac.cn)
	2020-03-20
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	709 页码:8
摘要	Central Asia is the global hotspot resulting from either a scarcity of natural resources or environmental degradation. Tajikistan, however, is called the "central Asian water tower", is rich inwater andminerals and plays a very important role in the ecology of Central Asia. Given the soil contamination issues in Tajikistan, the spatial distributions and sources of n-alkanes and heavymetals in surface sediments of Tajikistan were investigated. The evaluation of n-alkane and elemental indices helped to elucidate the origins of complex pollutants. The n-alkane indices were allowed to identify biogenic and petrogenic sources, and statistical methods were used to identify natural and anthropogenic sources of heavymetals. Enrichment factors were used to assess the contamination statuses of heavy metals. The results indicated that n-alkanes in the cluster I (sample 23) and II (samples 1, 5, 12, 14, 18, 22, 29, and 30) samples were affected by crude oil or incomplete fossil fuel combustion. Biomarker indices indicated strong contributions of petroleum sources to the n-alkanes in samples 14, 18, 23, and 29, but that n-alkanes in the other samples were mainly derived from higher plant waxes. Statistical analyses showed that cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), and zinc (Zn) were originated from industrial activities. Phosphorus (P) was closely related to local agricultural activities. Manganese (Mn) was derived from mining activities and industrial wastewater. The enrichment factors indicated that sediment was zero tominor contamination with Cr, Cu, Ni, and Pb, but moderate contaminationwith Cd and significant contamination with Zn. Interestingly, the samples contaminated with Cd included the cluster I and II samples, meaning the source of Cd contamination had agreed with the results of n-alkanes. The combined evaluation of n-alkanes and heavy metals suggested that their pollutant sources were crude oil contamination. (C) 2019 Elsevier B.V. All rights reserved.
关键词	Surface sediment N-alkanes Heavy metals Source identification Risk assessment Tajikistan
DOI	10.1016/j.scitotenv.2019.136278
关键词[WOS]	HEAVY-METAL CONTAMINATION ; POLYCYCLIC AROMATIC-HYDROCARBONS ; SPATIAL-DISTRIBUTION ; POLYCHLORINATED-BIPHENYLS ; UNCERTAINTY ANALYSIS ; RIVER SEDIMENTS ; TRACE-METALS ; LAKE ; SOILS ; POLLUTION
收录类别	SCI ; SCI
语种	英语
资助项目	Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0202] ; Strategic Priority Research Program of Chinese Academy of Sciences, Pan-Third Pole Environment Study for aGreen Silk Road[XDA2006030101] ; Natural Science Foundation of Hebei Province, China[D2018403115] ; Open Foundation of State Key Laboratory of Loess and Quaternary Geology[SKLLQG1717] ; National Natural Science Foundation of China[41671200]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Strategic Priority Research Program of Chinese Academy of Sciences, Pan-Third Pole Environment Study for aGreen Silk Road ; Natural Science Foundation of Hebei Province, China ; Open Foundation of State Key Laboratory of Loess and Quaternary Geology ; National Natural Science Foundation of China
WOS类目	Environmental Sciences
WOS记录号	WOS:000512281700141
出版者	ELSEVIER
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12759
专题	加速器质谱中心
通讯作者	Wu, Jinglu
作者单位	1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China 2.Heibei GEO Univ, Expt & Practice Teaching Ctr, Shijiazhuang 050031, Hebei, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Zhan, Shuie,Wu, Jinglu,Wang, Jingzhong,et al. Distribution characteristics, sources identification and risk assessment of n-alkanes and heavymetals in surface sediments, Tajikistan, Central Asia[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,709:8.
APA	Zhan, Shuie,Wu, Jinglu,Wang, Jingzhong,&Jing, Miao.(2020).Distribution characteristics, sources identification and risk assessment of n-alkanes and heavymetals in surface sediments, Tajikistan, Central Asia.SCIENCE OF THE TOTAL ENVIRONMENT,709,8.
MLA	Zhan, Shuie,et al."Distribution characteristics, sources identification and risk assessment of n-alkanes and heavymetals in surface sediments, Tajikistan, Central Asia".SCIENCE OF THE TOTAL ENVIRONMENT 709(2020):8.