Heavy metal concentrations in sediments from Xingyun lake, southwestern China_implications for environmental changes and human activities

doi:10.1007/s12665-018-7840-5

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 盐湖地质与环境实验室

	Heavy metal concentrations in sediments from Xingyun lake, southwestern China_implications for environmental changes and human activities
	Gao, Chunliang; Yu, Junqing; Min, Xiuyun; Cheng, Aiying; Hong, Rongchang; Zhang, Lisha
刊名	ENVIRONMENTAL EARTH SCIENCES
	2018-10
卷号	77 期号:19
ISSN号	1866-6280
DOI	10.1007/s12665-018-7840-5
英文摘要	Environmental changes influenced by human activities were recorded in the sediment cores from Xingyun lake. Based on the Cs-137 and Pb-210 dating, multi-proxy records, enrichment factor (EF), and geoaccumulation index (I-geo) methods, the history of human-environment interactions in Xingyun lake catchment during the past 140years was studied. The results showed that the total heavy metal pollution in Xingyun lake followed the decreasing order: the northwestern>the middle>the southwestern>the southern>the north easterly. These distributions were controlled by regional geochemical background values, pollution load, and the lake current driven by prevailing southwesterly winds. The total EF value of heavy metals followed the decreasing order: EF (Zn)>EF (Cr)>EF (Pb)>EF (Cd)>EF (Cu). The total I-geo value of heavy metals also followed the decreasing order: I-geo (Zn)>I-geo (Cr)>I-geo (Pb)>I-geo (Cd)>I-geo (Cu). Consequently, the total pollution level of heavy metals followed the decreasing order: Zn>Cr>Pb>Cd>Cu. Before 1910AD, the natural erosion caused by climate changes was the key factor for the heavy metals accumulated. After 1910AD, the heavy metal concentrations were mainly controlled by anthropogenic impacts, the dominant sources were from industrial pollution, agricultural pollution, mining, and organic degradation. Finally, the sedimentary evolution history of Xingyun lake can be divided into four stages, i.e., (1) natural evolution stage during 1862-1910AD, (2) anthropogenic disturbance stage during 1910-1953AD, (3) anthropogenic reconstruction stage during 1953-1984AD, and (4) eutrophication stage after 1984AD.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34423]
专题	青海盐湖研究所_盐湖地质与环境实验室
推荐引用方式 GB/T 7714	Gao, Chunliang,Yu, Junqing,Min, Xiuyun,et al. Heavy metal concentrations in sediments from Xingyun lake, southwestern China_implications for environmental changes and human activities[J]. ENVIRONMENTAL EARTH SCIENCES,2018,77(19).
APA	Gao, Chunliang,Yu, Junqing,Min, Xiuyun,Cheng, Aiying,Hong, Rongchang,&Zhang, Lisha.(2018).Heavy metal concentrations in sediments from Xingyun lake, southwestern China_implications for environmental changes and human activities.ENVIRONMENTAL EARTH SCIENCES,77(19).
MLA	Gao, Chunliang,et al."Heavy metal concentrations in sediments from Xingyun lake, southwestern China_implications for environmental changes and human activities".ENVIRONMENTAL EARTH SCIENCES 77.19(2018).