Ecological security and health risk assessment of soil heavy metals on a village-level scale, based on different land us
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ORIGINAL PAPER
Ecological security and health risk assessment of soil heavy metals on a village-level scale, based on different land use types Shiqi Tian . Shijie Wang . Xiaoyong Bai . Dequan Zhou . Guangjie Luo . Yujie Yang . Zeyin Hu . Chaojun Li . Yuanhong Deng . Qian Lu
Received: 27 September 2019 / Accepted: 17 April 2020 Ó Springer Nature B.V. 2020
Abstract Land use affects the accumulation of heavy metals in soil, which will endanger ecological safety and human health. Taking the village as an administrative unit, the ecological safety and health risks of heavy metals, namely, Cr, Cu, Zn, and Pb in soils in the Houzhai River Watershed of Guizhou Province, China, were evaluated based on land use types by the Hakanson potential ecological risk methods and human health risk model. Results showed that the spatial heterogeneity of Cu and Zn was greatly
affected by primary structural factors, and Cr and Pb were interfered by both structural factors and human activities. The geo-accumulation index of the heavy metals showed a light pollution in the study area. The comprehensive potential ecological risk of heavy metal in the area was divided into three levels: slight, moderate, and intense, and it is spatially high in the northwest and low in the southeast. Both noncarcinogenic risk and carcinogenic risk of the heavy metals to the human body are not significant and are
S. Tian S. Wang X. Bai (&) Y. Yang Z. Hu C. Li Y. Deng Q. Lu State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, Guizhou Province, China e-mail: [email protected]
X. Bai G. Luo Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed, Guizhou Education University, Guiyang 550018, China
S. Tian D. Zhou Y. Yang C. Li School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China S. Tian S. Wang Y. Yang Z. Hu C. Li Y. Deng Q. Lu Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, Guizhou Province, China X. Bai CAS Center for Excellence in Quaternary Science and Global Change, Xi0 an 710061, Shanxi Province, China
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Environ Geochem Health
acceptable. The risks of children are higher than adults, and direct intake is the primary route of exposure in the area. The potential ecological risk and human health risk of soil heavy metals are relatively obviously affected by digital elevation data and normalized vegetation index. The study has certain reference value for the prevention and control of regional soil heavy metal risk. Keywords Land use Soil heavy metals Ecological security Health risk
Introduction Heavy metal pollution in soil has been widely recognized as a very serious environmental problem. The accumulation of excessive heavy metals in the soil may lead to a decline in soil quality and ultimately to the ecological safety of the affected areas. Studies have shown that
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