干旱区生态环境知识资源中心(Arid): Simulation of vertical migration behaviors of heavy metals in polluted soils from arid regions in northern China under extreme weather

Arid

DOI	10.1016/j.scitotenv.2024.170494
	Simulation of vertical migration behaviors of heavy metals in polluted soils from arid regions in northern China under extreme weather
	Xu, Zixin; Yin, Ming; Yang, Xue; Yang, Yong; Xu, Xuehui; Li, Haigang; Hong, Mei; Qiu, Guohong; Feng, Xionghan; Tan, Wenfeng; Yin, Hui
通讯作者	Yin, H
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	919
英文摘要	Heavy metal migration behaviors and mechanisms in soils are important for pollution control and remediation. However, there are few related studies in arid areas under extreme weather patterns. In this study, we developed a one-dimensional continuous point source unsaturated solute transport model, and utilized Hydrus-1D to simulate the transport of Cu, As and Zn, in the pack gas zones of soils within the impact areas of two typical mining areas in Inner Mongolia. The results show that the soil has a significant interception capacity, with a short heavy metal vertical migration distance of <= 100 cm. Soil texture and heavy metal sorption affinity are two key factors that influence heavy metal transport. In soils with high contents of sands but low contents of clays, heavy metals have large mobility and thus migrate deeper and are more evenly distributed in the soil profile. The migration of different heavy metals in the same soil also varies considerably, with large migration depth for metals having low binding affinities onto soils. Scenario analysis for extreme drought and rainfall shows that, rainfall amount and intensity are positively correlated with heavy metal transport depth and negatively correlated with the peak concentration. Increasing rainfall/intensity results in a more uniform distribution of heavy metals, and lower profile concentrations owing to enhanced horizontal dispersion of surface runoff. When the total amount and intensity of rainfall remain constant, continuous or intermittent rainfall only affects the transport process but has almost no effect on the final pollutant concentration redistribution in the soil. These results provide theoretical data for estimating the degree of heavy metal pollution, and help design control and remediation strategies for polluted soils.
英文关键词	Soils Heavy metals Contaminant transport Scenario analysis Extreme weathers
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001188400800001
WOS关键词	TRANSPORT ; ADSORPTION ; CD ; MECHANISMS ; WATER ; ZN
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/2XILL650/405468
推荐引用方式 GB/T 7714	Xu, Zixin,Yin, Ming,Yang, Xue,et al. Simulation of vertical migration behaviors of heavy metals in polluted soils from arid regions in northern China under extreme weather[J],2024,919.
APA	Xu, Zixin.,Yin, Ming.,Yang, Xue.,Yang, Yong.,Xu, Xuehui.,...&Yin, Hui.(2024).Simulation of vertical migration behaviors of heavy metals in polluted soils from arid regions in northern China under extreme weather.SCIENCE OF THE TOTAL ENVIRONMENT,919.
MLA	Xu, Zixin,et al."Simulation of vertical migration behaviors of heavy metals in polluted soils from arid regions in northern China under extreme weather".SCIENCE OF THE TOTAL ENVIRONMENT 919(2024).