干旱区生态环境知识资源中心(Arid): Spatial distribution and risk assessments of mercury in topsoils of Central Asia

Arid

DOI	10.1016/j.gsf.2023.101585
	Spatial distribution and risk assessments of mercury in topsoils of Central Asia
	Yang, Zhengzheng; Guo, Junming; Sun, Shiwei; Ni, Dingming; Chen, Pengfei; Rupakheti, Dipesh; Kang, Huhu; Abdullaev, Sabur F.; Uulu, Salamat Abdyzhapar; Kang, Shichang
通讯作者	Sun, SW
来源期刊	GEOSCIENCE FRONTIERS
ISSN	1674-9871
出版年	2023
卷号	14 期号:4
英文摘要	Central Asia is one of the largest arid areas on earth, yet little is known about the concentration levels and risks of mercury (Hg) in the soils of this region. In this study, extensive sampling of topsoils (0-10 cm) from representative landscapes was carried out over Central Asia (i.e., Tajikistan, Uzbekistan, and Kyrgyzstan). The total mercury (THg) concentrations in topsoils varied widely from 1.6 to 908.0 ng/g, with high values observed in samples collected in the capital cities and urban areas. Topsoil THg concen-trations among different landscapes showed a decreasing order of urban (79.8 +/- 184.0 ng/g) > woodland (27.3 +/- 28.9 ng/g) > grassland (20.6 +/- 15.9 ng/g) > farmland (18.3 +/- 9.5 ng/g) > desert (12.3 +/- 8.0 ng/g). High THg concentrations were found in the capital cities/urban clusters, followed by a gradual decrease towards the peripheries. THg concentrations were found to be negatively correlated with the distance from the sampling sites to their nearest cities, indicating that anthropogenic emissions significantly influ-enced the spatial distribution of topsoil Hg. A significant correlation between THg concentrations and topsoil total organic carbon (TOC) contents was also observed, suggesting that TOC played an essential role in the spatial distribution of topsoil Hg. The assessments of pollution and potential ecological risk suggested that topsoils in highly densely-populated areas were contaminated by Hg and had higher degrees of potential ecological risks. The health risk assessment results showed that the exposure risk of topsoil Hg to children was higher than that to adults. Fortunately, there was no unacceptable human health risk of topsoil Hg. This study clarified the spatial distribution and risks of Hg in the Central Asian topsoils, offering new insight into the risk prevention and control of soil Hg.(c) 2023 China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).
英文关键词	Mercury Topsoil Landscape Spatial distribution Risk assessment Central Asia
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:000966222000001
WOS关键词	HEAVY-METAL CONTAMINATION ; HEALTH-RISK ; SOURCE IDENTIFICATION ; AGRICULTURAL SOILS ; INDUSTRIAL-CITY ; ORGANIC-MATTER ; SURFACE SOIL ; FOREST SOILS ; BLACK CARBON ; ICE-CORE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396732
推荐引用方式 GB/T 7714	Yang, Zhengzheng,Guo, Junming,Sun, Shiwei,et al. Spatial distribution and risk assessments of mercury in topsoils of Central Asia[J],2023,14(4).
APA	Yang, Zhengzheng.,Guo, Junming.,Sun, Shiwei.,Ni, Dingming.,Chen, Pengfei.,...&Kang, Shichang.(2023).Spatial distribution and risk assessments of mercury in topsoils of Central Asia.GEOSCIENCE FRONTIERS,14(4).
MLA	Yang, Zhengzheng,et al."Spatial distribution and risk assessments of mercury in topsoils of Central Asia".GEOSCIENCE FRONTIERS 14.4(2023).