气候变化领域集成服务门户(CCPortal): Temporal-spatial characteristics and sources of heavy metals in bulk deposition across China

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DOI	10.1016/j.scitotenv.2024.171903
	Temporal-spatial characteristics and sources of heavy metals in bulk deposition across China
	Ma, Xin; Sha, Zhipeng; Li, Yunzhe; Si, Ruotong; Tang, Aohan; Fangmeier, Andreas; Liu, Xuejun
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	926
卷号	926
英文摘要	With the rapid development of industries, agriculture, and urbanization (including transportation and population growth), there has been a significant alteration in the emission and atmospheric deposition of heavy metal pollutants. This has consequently given rise to a range of ecological and environmental health issues. In this study, we conducted a comprehensive two-year investigation on the temporal and spatial distribution characteristics of heavy metals in atmospheric deposition across China based on the Nationwide Nitrogen Deposition Monitoring Network (NNDMN). The atmospheric bulk deposition of Lead (Pb), Arsenic (As), Nickel (Ni), Selenium (Se), Chromium (Cr) and Cadmium (Cd) were 6.32 +/- 1.59, 4.49 +/- 0.57, 1.31 +/- 0.21, 1.05 +/- 0.16, 0.60 +/- 0.06 and 0.21 +/- 0.03 mg m(-2) yr(-1), respectively, with a large variation among the different regions of China. The order for atmospheric deposition flux was Southwest China > Southeast China > North China > Northeast China > Qinghai-Tibet Plateau and rural area > urban area > background area. The concentrations of heavy metals in bulk deposition exhibit seasonal variation with higher levels observed during winter compared to summer and spring, which are closely associated with anthropogenic activities. The Positive Matrix Factorization (PMF) results indicated that combustion, industrial emissions and traffic are the primary contributors to atmospheric deposition of heavy metals. The single factor pollution index (P-i) of heavy metals is consistently below 1, and the composite pollution index (N-i) is 0.16 across China, indicating that atmospheric heavy metal deposition is at a pollution-free level. The comprehensive potential ecological risk index of heavy metals is 11.8, with Cd exhibiting the highest single factor potential ecological risk index at 7.09, suggesting that more attention should be paid to Cd deposition in China. The present study reveals the spatial-temporal distribution pattern of atmospheric heavy metals deposition in China, identifying regional source characteristics and providing a theoretical foundation and strategies for reducing emissions of atmospheric pollutants.
英文关键词	Atmospheric bulk deposition; Heavy metals; Source; Ecological risk
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001218058400001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304984
作者单位	China Agricultural University; China Agricultural University; Kunming University of Science & Technology; University Hohenheim
推荐引用方式 GB/T 7714	Ma, Xin,Sha, Zhipeng,Li, Yunzhe,et al. Temporal-spatial characteristics and sources of heavy metals in bulk deposition across China[J],2024,926.
APA	Ma, Xin.,Sha, Zhipeng.,Li, Yunzhe.,Si, Ruotong.,Tang, Aohan.,...&Liu, Xuejun.(2024).Temporal-spatial characteristics and sources of heavy metals in bulk deposition across China.SCIENCE OF THE TOTAL ENVIRONMENT,926.
MLA	Ma, Xin,et al."Temporal-spatial characteristics and sources of heavy metals in bulk deposition across China".SCIENCE OF THE TOTAL ENVIRONMENT 926(2024).