干旱区生态环境知识资源中心(Arid): Unraveling the impact of dissolved organic matter on arsenic mobilization in alluvial aquifer of the lower Yellow River basin, Northern China

Arid

DOI	10.1016/j.apgeochem.2023.105781
	Unraveling the impact of dissolved organic matter on arsenic mobilization in alluvial aquifer of the lower Yellow River basin, Northern China
	Jiang, Jiaqi; Wang, Xianguo; Su, Chunli; Wang, Mengzhu; Ren, Feifei; Huq, Md. Enamul
通讯作者	Su, CL
来源期刊	APPLIED GEOCHEMISTRY
ISSN	0883-2927
EISSN	1872-9134
出版年	2023
卷号	158
英文摘要	Increased exposure to arsenic (As) has been reported in many arid and semi-arid areas, where drinking water and agricultural irrigation strongly rely on groundwater. High-As groundwater occurred widely in the Northern Henan Plain, which belongs to the lower Yellow River alluvial plain area, posing a new threat to the health of local residents. Based on 77 groundwater samples collected from different hydrogeological units, the sources and optical characteristics of dissolved organic matter (DOM) components in groundwater were analyzed using a three-dimensional fluorescence spectroscopy excitation-emission matrix (3D-EEM) and parallel factor analysis (PARAFAC), to reveal the influence of organic matter on As mobilization and enrichment in Quaternary alluvial aquifers. The results showed that high-As groundwater was concentrated in the areas of the piedmont alluvial depressions and the Yellow River crevasse splay, which was closely related to the richness of organic matter in the buried sediments of the Yellow River paleochannels. Vertically, the variability of groundwater As was governed by the redox conditions and anthropogenic activities, leading to elevated As levels in deep aquifers. High-As groundwater was characterized by high content of humic-like components (C2+C3), strong humification, and weak authigenic sources, which can be attributed to the effects of frequent diversion of the Yellow River and the introduction of more terrestrial humic-like components by intensive agricultural activities (e.g., irrigation). The significant correlations between Fe2+ and As and NH4+ (r = 0.65, 0.48, p < 0.05) as well as the maximum fluorescence intensity of C2 and C3 with As (r = 0.59, 0.74, p < 0.05) reflected the dominant impact of DOM on As migration. The terrestrial-derived high molecular weight organic matter C2 facilitated As mobilization through complexation reactions, while the labile humic-like component C3 triggered the reductive dissolution of iron oxides/hydroxides through microbial metabolic processes, which together contributed to the enrichment of As in groundwater from the Northern Henan Plain.
英文关键词	Arsenic DOM EEM-PARAFAC Paleochannels of Yellow River Sedimentary aquifers
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001072867000001
WOS关键词	TERNARY COMPLEX-FORMATION ; SHALLOW GROUNDWATER ; DATONG BASIN ; HENAN PLAIN ; HETAO BASIN ; SPECTROSCOPIC CHARACTERIZATION ; HUMIC SUBSTANCES ; FLUORESCENCE ; WATER ; CARBON
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395345
推荐引用方式 GB/T 7714	Jiang, Jiaqi,Wang, Xianguo,Su, Chunli,et al. Unraveling the impact of dissolved organic matter on arsenic mobilization in alluvial aquifer of the lower Yellow River basin, Northern China[J],2023,158.
APA	Jiang, Jiaqi,Wang, Xianguo,Su, Chunli,Wang, Mengzhu,Ren, Feifei,&Huq, Md. Enamul.(2023).Unraveling the impact of dissolved organic matter on arsenic mobilization in alluvial aquifer of the lower Yellow River basin, Northern China.APPLIED GEOCHEMISTRY,158.
MLA	Jiang, Jiaqi,et al."Unraveling the impact of dissolved organic matter on arsenic mobilization in alluvial aquifer of the lower Yellow River basin, Northern China".APPLIED GEOCHEMISTRY 158(2023).