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• W4313339953 endingPage "117030" @default.
• W4313339953 startingPage "117030" @default.
• W4313339953 abstract "A record of trace elements in lake sediment can help in assessing the impact of anthropogenic activities on aquatic environments. In the present work, the trace elements profiles (Cu, Cr, Pb, Zn, As, and Cd) were determined in four sediment cores (QH01, QH02, QH07, and Z04) collected in 2012 and 2014 from Lake Qinghai to reconstruct the history of anthropogenic activity in the watershed and to evaluate the pollution status and eco-environmental risks of a typical Third Pole lake environment over the past century. The concentrations of Cu, Cr, Pb, Zn, As, and Cd in these studies ranged between 19.4 and 34.2 μg g-1, 35.6-53.6 μg g-1, 3.10-26.8 μg g-1, 56.4-93.5 μg g-1, 6.20-15.3 μg g-1, and 0.086-0.572 μg g-1, respectively. Statistical analyses indicated that the Pb, Zn, and Cd contents combination of coal, gasoline burning, and agricultural activities in the Lake Qinghai catchment and larger-scale atmospheric inputs during the past 60 years. The enrichment factors for Pb, Zn, and Cd in the sediments of Lake Qinghai are considered to be related to the region of the Qinghai-Tibet Plateau and national socioeconomic development. Enrich factor of Cd values was higher than 3.5 and maximum values of the geo-accumulation index of Pb and Cd were observed in the top layer of the sediment (0-2 cm), indicating moderate contamination. The RI values suggest that the risks to the ecological environment of Lake Qinghai are increasing since the 1950s. The results of this study illustrate that Lake Qinghai is still experiencing high trace elements pollution pressure due to the rapid environmental changes caused by anthropogenic activities on the remote and isolated Qinghai-Tibet Plateau." @default.
• W4313339953 created "2023-01-06" @default.
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• W4313339953 date "2023-03-01" @default.
• W4313339953 modified "2023-09-30" @default.
• W4313339953 title "Trace elements accumulation over a century in sediment cores from a tectonic lake on the Qinghai-Tibet plateau: Source identification and risk assessment" @default.
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• W4313339953 doi "https://doi.org/10.1016/j.jenvman.2022.117030" @default.
• W4313339953 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36584509" @default.
• W4313339953 hasPublicationYear "2023" @default.
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