干旱区生态环境知识资源中心(Arid): Influence of anthropogenic activities and loess dusts on the rainwater hydrochemistry in the Chinese Loess Plateau

Arid

DOI	10.1016/j.jenvman.2023.119137
	Influence of anthropogenic activities and loess dusts on the rainwater hydrochemistry in the Chinese Loess Plateau
	Ma, Keke; Chai, Ningpan; Huang, Huayu; Xiao, Jun
通讯作者	Xiao, J
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2023
卷号	347
英文摘要	Rainwater hydrochemistry is an important indicator for tracing anthropogenic input on air quality. As the fastest economically developing city in the northwestern China and the Chinese Loess Plateau, rainwater chemistry, sources of dissolved solutes, and the influence of loess dust on rainwater chemistry in Xi'an city is unclear. Inorganic ions, delta D and delta 18O of two years' rainwater samples were measured to decipher the above issues. Rainwater samples were weakly alkaline (pH = 7.2) with the mean total dissolved solids (TDS) values of 43 mg/ L. NH4+ and Ca2+ dominated in the cations and SO42  and NO3  dominated in the anions. The wet deposition of sulfur (S) and nitrogen (N) was 70.9 +/- 67 mg & sdot;(m2 & sdot;month) 1 and 244.8 +/- 270.9 mg & sdot;(m2 & sdot;month) 1, respectively. The meteoric water line in Xi'an was delta D = 7.29 delta 18O+3.72 (R2 = 0.99). delta D, delta 18O, and d-excess analysis indicated the influence of evaporation on the dissolved solutes in rainwater, especially in the dry season. Rainwater acidity in the Xi'an city was mainly neutralized by Ca2+ and NH4+, and the neutralization ability in Xi'an city is higher than the southern China cities. Correlation analysis (CA), positive matrix factorization (PMF), and the backward air masses trajectory model identified high NH4+ and Ca2+ in rainwater were mainly originated from local agricultural activities and loess dust, while NO3  and SO42  were associated with local coal combustion and vehicle exhaust sources. High inputs of dusts and coal combustion in spring and winter resulted in elevated values of pH and major ions in Xi'an. Due to the air pollution control policy, air quality in Xi'an is getting better in recent years. Our study highlights the influence of anthropogenic activities and loess dusts on the rainwater hydrochemistry in Xi'an and provides important dataset for air pollution control for other cities in semi-arid and arid regions.
英文关键词	Rainwater Hydrochemistry Loess dust Neutralization factor Positive matrix factorization
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001088735200001
WOS关键词	ATMOSPHERIC WET DEPOSITION ; NATIONAL NATURE-RESERVE ; CHEMICAL-COMPOSITION ; SOURCE APPORTIONMENT ; TRACE-ELEMENTS ; URBAN SITE ; PRECIPITATION CHEMISTRY ; IONIC COMPOSITION ; INORGANIC-IONS ; XIAN CITY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397301
推荐引用方式 GB/T 7714	Ma, Keke,Chai, Ningpan,Huang, Huayu,et al. Influence of anthropogenic activities and loess dusts on the rainwater hydrochemistry in the Chinese Loess Plateau[J],2023,347.
APA	Ma, Keke,Chai, Ningpan,Huang, Huayu,&Xiao, Jun.(2023).Influence of anthropogenic activities and loess dusts on the rainwater hydrochemistry in the Chinese Loess Plateau.JOURNAL OF ENVIRONMENTAL MANAGEMENT,347.
MLA	Ma, Keke,et al."Influence of anthropogenic activities and loess dusts on the rainwater hydrochemistry in the Chinese Loess Plateau".JOURNAL OF ENVIRONMENTAL MANAGEMENT 347(2023).