干旱区生态环境知识资源中心(Arid): Temporal-Spatial Distributions and Influencing Factors of Heavy Metals As, Cd, Pb, and Zn in Alluvial Soils on a Regional Scale in Guangxi, China

Arid

DOI	10.3390/min13081107
	Temporal-Spatial Distributions and Influencing Factors of Heavy Metals As, Cd, Pb, and Zn in Alluvial Soils on a Regional Scale in Guangxi, China
	Tian, Mi; Wang, Xueqiu; Zhou, Jian; Chi, Qinghua; Liu, Dongsheng; Qiao, Yu; Wu, Chao; Zhou, Yining; Wang, Qiang; Liu, Futian
通讯作者	Tian, M ; Wang, XQ
来源期刊	MINERALS
EISSN	2075-163X
出版年	2023
卷号	13 期号:8
英文摘要	Understanding the temporal-spatial distribution and influencing factors of heavy metals on a regional scale is crucial for assessing the anthropogenic impacts and natural variations in elemental geochemical behavior. This study evaluated the spatial distributions of the heavy metals As, Cd, Pb, and Zn as well as the driving mechanisms over the past 31 years in Guangxi, China, using three geochemical baseline projects (the Environmental Geochemical Monitoring Network Project (EGMON) project 1992-1996; the Geochemical Baseline (CGB) 1 project 2008-2012; and the CGB2 project 2015-2019). By calculating the variable importance using the random forest algorithm, it was found that natural factors are the primary drivers of the spatial distribution of heavy metals in the EGMON project, especially precipitation for As, the digital elevation model (DEM) for Cd and Pb, and temperature for Zn. Surface alluvial soils showed obvious heavy metal enrichment in the CGB1 project, with the gross domestic product (GDP) driving the spatial distribution of all heavy metals. In addition, the anomalous intensity and range of heavy metals in the CGB2 project decreased significantly compared with the CGB1 project, especially owing to the normalized difference vegetation index (NDVI) as a positive anthropogenic factor that improves the degree of rocky desertification, thus reducing the heavy metal contents of As and Pb, and the precipitation promoting the decomposition of Fe-Mn concretions and thus the migration of Cd and Zn. This research promotes an understanding of anthropogenic and natural influences on the spatiotemporal distribution of heavy metals and is of great significance for environmental monitoring and governance.
英文关键词	heavy metals alluvial soil spatiotemporal variations driving factors geochemical baseline projects
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001056287600001
WOS关键词	POLLUTION ; RISK ; ACCUMULATION ; VARIABILITY ; SEDIMENTS ; VALUES
WOS类目	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397862
推荐引用方式 GB/T 7714	Tian, Mi,Wang, Xueqiu,Zhou, Jian,et al. Temporal-Spatial Distributions and Influencing Factors of Heavy Metals As, Cd, Pb, and Zn in Alluvial Soils on a Regional Scale in Guangxi, China[J],2023,13(8).
APA	Tian, Mi.,Wang, Xueqiu.,Zhou, Jian.,Chi, Qinghua.,Liu, Dongsheng.,...&Liu, Futian.(2023).Temporal-Spatial Distributions and Influencing Factors of Heavy Metals As, Cd, Pb, and Zn in Alluvial Soils on a Regional Scale in Guangxi, China.MINERALS,13(8).
MLA	Tian, Mi,et al."Temporal-Spatial Distributions and Influencing Factors of Heavy Metals As, Cd, Pb, and Zn in Alluvial Soils on a Regional Scale in Guangxi, China".MINERALS 13.8(2023).