气候变化领域集成服务门户(CCPortal): Pollution revealed by stable lead isotopes in recent snow from the northern and central Tibetan Plateau

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DOI	10.1016/j.ecoenv.2023.115296
	Pollution revealed by stable lead isotopes in recent snow from the northern and central Tibetan Plateau
	Zheng, Kui; Li, Yuefang; Wang, Ninglian; Zhou, Youhao; Li, Zhen
发表日期	2023
ISSN	0147-6513
EISSN	1090-2414
卷号	263
英文摘要	Lead (Pb) isotopes are less fractionated than those from different sources, and thus were used to trace the sources of Pb in the environment. To investigate the sources of Pb in the atmosphere of the Tibetan Plateau, stable Pb isotopes (206Pb, 207Pb and 208Pb) in acidified snow pit samples collected from five glaciers (i.e., Qiyi-QY, Meikuang-MK, Yuzhufeng-YZF, Hariqin-HRQ and Xiaodongkemadi-XDKMD) in May 2016 of the northern and central Tibetan Plateau were measured. The results showed narrow ranges of 1.158-1.187 for 206Pb/207Pb and 2.450-2.489 for 208Pb/207Pb respectively. The 206Pb/207Pb ratios in all samples were obviously lower than the environmental background value of 1.196, indicating the primary contributions of anthropogenic sources. At least 60% of Pb was contributed by various human activities, which was supported by the Pb isotopes in the snow pit samples from the QY, MK, YZF, HRQ and XDKMD glaciers. By comparing Pb isotope data, we found that the primary anthropogenic sources are coal combustion, mining and smelting activities in northwestern China and mixed emissions from cities located in western China and close to the glaciers. These sources contributed to the Pb in the northern glaciers (QY and MK) in particular. Coal combustion in India probably contributes to the central glaciers (HRQ and XDKMD). Another potential source could be parts of central Asia (e.g., Kyrgyzstan and Uzbekistan) through long range transport. The above potential source areas of contaminants were traced further by the air mass back-trajectory tracing method.
关键词	Stable lead isotopes Acidified samples Anthropogenic sources Snow pit Tibetan Plateau
英文关键词	ATMOSPHERIC LEAD; ANTARCTIC SNOW; ICE-CORE; MOUNTAIN GLACIERS; TRACE-ELEMENTS; ALPINE SNOW; PB; GREENLAND; DUST; RECORD
WOS研究方向	Environmental Sciences ; Toxicology
WOS记录号	WOS:001054907400001
来源期刊	ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283809
作者单位	Northwest University Xi'an; Chinese Academy of Sciences; Northwest University Xi'an; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Zheng, Kui,Li, Yuefang,Wang, Ninglian,et al. Pollution revealed by stable lead isotopes in recent snow from the northern and central Tibetan Plateau[J]. 中国科学院青藏高原研究所,2023,263.
APA	Zheng, Kui,Li, Yuefang,Wang, Ninglian,Zhou, Youhao,&Li, Zhen.(2023).Pollution revealed by stable lead isotopes in recent snow from the northern and central Tibetan Plateau.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,263.
MLA	Zheng, Kui,et al."Pollution revealed by stable lead isotopes in recent snow from the northern and central Tibetan Plateau".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 263(2023).