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- W4210590031 endingPage "118956" @default.
- W4210590031 startingPage "118956" @default.
- W4210590031 abstract "Due to increased anthropogenic activities in recent decades, many heavy metal elements have been emitted into the atmosphere and transported to remote regions. The Enrichment factors (EFs) is a normally used method for evaluating the source of heavy metal elements. However, because of some flaws of this method (e.g., higher solubility of heavy metals elements than reference elements in dilute acid), the anthropogenic contributions of some heavy metal elements in the precipitation sample were overestimated. To address this issue, EFs of heavy metal elements of aerosol, precipitation and snowpit samples in a typical remote area of the Tibetan Plateau (TP) were compared. The results showed that the EF values of many heavy metal elements in precipitation and snowpit samples were close to that of aerosol samples treated with dilute acid but usually much higher than those of totally dissolved aerosol samples. Moreover, EF values of most heavy metal elements in the ice core at the margin of the TP were higher than those at central TP, indicating that signal of long-range transport anthropogenic emitted heavy metal elements is weak and may be covered by natural mineral dust sources at glacier region. Therefore, the threshold EF values for determining anthropogenic sources of heavy metal elements in precipitation and ice core samples should be higher than those of aerosols. This study provides new knowledge on investigating anthropogenic sources of heavy metals in precipitation samples at both the TP and other regions of the world." @default.
- W4210590031 created "2022-02-08" @default.
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- W4210590031 date "2022-05-01" @default.
- W4210590031 modified "2023-10-14" @default.
- W4210590031 title "Overestimation of anthropogenic contribution of heavy metals in precipitation than those of aerosol samples due to different treatment methods" @default.
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- W4210590031 doi "https://doi.org/10.1016/j.envpol.2022.118956" @default.
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