NDLI: Spatial Distribution of Soil Heavy Metals and Associated Environmental Risks near Major Roads in Southern Tibet, China

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Spatial Distribution of Soil Heavy Metals and Associated Environmental Risks near Major Roads in Southern Tibet, China

Content Provider	MDPI
Author	She, Wanjiang Guo, Linghui Gao, Jiangbo Zhang, Chi Wu, Shaohong Jiao, Yuanmei Zhu, Gaoru
Copyright Year	2022
Description	Soil heavy metal pollution is becoming an increasingly serious environmental problem. This study was performed to investigate the contents of surface soil heavy metals (Cu, Zn, Pb, Cd) near six roads in the southern part of the Tibetan Plateau. Multivariate statistics, geoaccumulation index, potential ecological risk, and a human health assessment model were used to study the spatial pollution pattern and identify the main pollutants and regions of concern. The mean $Igeo$ was ranked in the order Cd > Cu > Zn > Pb, with the average concentrations of Cd, Zn, and Cu exceeding their corresponding background levels 4.36-, 1.00-, and 1.8-fold, respectively. Soil Cd level was classified as posing a considerable potential risk near national highways and a high potential risk near non-national highways, whereas soil Cu, Zn, and Pb were associated with a low potential ecological risk for each class of roads. Furthermore, the non-carcinogenic risk due to soil heavy metals for each class of roads was within the acceptable risk level for three exposure pathways for both adults and children, but the carcinogenic risk attributable to soil Pb exceeded the threshold for children near highways G318, G562, and G219 and for adults near highway G318. Our work not only underscores the importance of assessing potential threats to ecological and human health due to soil heavy metal pollution on road surfaces but also provides quantitative guidance for remediation actions.
Starting Page	8380
e-ISSN	16604601
DOI	10.3390/ijerph19148380
Journal	International Journal of Environmental Research and Public Health
Issue Number	14
Volume Number	19
Language	English
Publisher	MDPI
Publisher Date	2022-07-08
Access Restriction	Open
Subject Keyword	International Journal of Environmental Research and Public Health Water Science and Technology Soil Heavy Metal Pollution Ecological Risk Evaluation Health Risk Evaluation Southern Tibet Road Engineering
Content Type	Text
Resource Type	Article

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