This study selected the Jinsha Lake and the Miersi Industry Park as key survey areas to study the distribution of heavy metals in soil in Hong’an County, Hubei Province. Samples were collected from surface soil and vertical soil profiles to assay the contents of eight heavy metals, i.e., Cu, Pb, Zn, Cr, Ni, Cd, As, and Hg. Both the single factor pollution index method and the potential ecological hazard index method were used to assess the distribution and the ecological risk of heavy metals. The study results are as follows:The average contents of the above eight heavy metals were 21.48×10-6, 21.75×10-6, 63.60×10-6, 53.24×10-6, 20.25×10-6, 0.13×10-6, 5.44×10-6, and 0.04×10-6,respectively. The cumulative Cu, Cr, Ni, and Cd are relatively enriched in the soil and their pollution is slight. The heavy metals show distinct distribution patterns. Minor pollution exists in the Gaoqiao-Yongjiahe basic-ultrabasic melange zone and around the Miershi Industrial Park, while severe pollution exists in Mn-Co mineralized points scattered in the northeastern Baliwan. Pb and Hg are enriched in the surface layer but decrease in the deep layer, Cr and Ni show an inverse trend, while other elements show indistinct distribution patterns. Cd and Hg have high potential ecological risk individually in the soil in the surveyed areas. The comprehensive ecological risk assessment based on Cd and Hg shows that the surrounding area of the Jinsha Lake Chengguan Town, the basic-ultrabasic melange zone, the surrounding area of the Miersi Industrial Park, and the Baliwan manganese-cobalt mineralization zone are areas with moderate potential ecological risks, where ecological supervision and protection should be strengthened. This study can provide a scientific basis for later ecological management in Hongan. It also serves as a good soil reference for other ecological geological surveys.
居字龙, 秦志军, 万翔, 袁航, 张小波, 王登. 湖北红安县生态地质调查土壤重金属分布特征及生态风险评价[J]. 物探与化探, 2022, 46(4): 988-998.
JU Zi-Long, QIN Zhi-Jun, Wan Xiang, YUAN Hang, ZHANG Xiao-Bo, WANG Deng. Accessing the distribution and ecological risks of heavy metals in soil in Hong’an County, Hubei Province through ecological geological surveys. Geophysical and Geochemical Exploration, 2022, 46(4): 988-998.
Xu X B, Lyu J S, Xu R R. Source spatial distribution and risk assessment of heavy metals in Yiyuan county of Shandong Province[J]. Transactions of the Chinese Society of Agricultural Engineering, 2018, 34(9):216-223.
Dai B, Lyu J S, Zhan J C, et al. Assessment of sources,spatial distribution and ecological risk of heavy metals in soils in a typical industry-based city of Shandong Province,Eastern China[J] .Environmental Science, 2015, 36(2):507-515.
Zhou Y L, Guo Z J, Wang C W, et al. Assessment of heavy metal pollution and potential ecological risks of soils in Zhenxiong County,Yunnan Province[J]. Geophysical and Geochemical Exploration, 2019, 43(6):1358-1366..
Chang W J, Li Z J, Zhou Y Z, et al. Heavy metal pollution and comprehensive ecological risk assessment of surface soil in different functional areas of Shenzhen,China[J]. Chinese Journal of Applied Ecology, 2020, 31(3):999-1007.
Shi C H, Wang Y Y, Chai L Y, et al. Assessment of heavy metal and human health risk in surface soils around Dongting Lake wetland,China[J]. The Chinese Journal of Nonferrous Metals, 2020, 30(1):150-161.
Wang Y S, Liu C J, Chen X Y, et al. Pollution risk assessments of heavy metals in soils around a municipal solid waste incinerator[J]. Journal of South China Normal University:Natural Science Edition, 2020, 52(5):57-64.
Wang J B, Wei X F, Zhang H Q, et al. The eco-geological survey based on geological formation,exemplified by integrated geological survey of National Ecological Civilization Demonstration Area in Chengde City,Hebei Province[J]. Geology in China, 2020, 47(6):1611-1624.
Zhang T J, Liu H, Ouyang Y, et al. A preliminary discussion on the physical and chemical characteristics and main controlling factors of soil and parent material in the middle and high mountain area-Take Xichang as an example[J]. Sedimentary Geology and Tethyan Geology, 2020, 40(1):106-114.
Huang H, Zhou Y, Liu Y J, et al. Source analysis of heavy metals in farmland and based on environmental variables and random forest approach:District of Xiangzhou District in Xiangyang City[J]. Acta Scientiae Circumstantiae, 2020, 40(12):4548-4558.
Li X Y, Wu J, Liu H Q. Concentration and ecology risk assessment of heavy metal in five forest soils in southeastern Hubei province[J]. Journal of Central South University of Forest & Technology, 2019, 39(10):103-108.
Ajiguli M, Maimaitituerxun A, Ainiwaer M. Vertical distribution characteristics and risk assessment of soil heavy metal contamination of farmlands in Yanqi County,Xinjiang[J]. Research of Soil and Water Conservation, 2018, 25(2):367-373.
Maimaitituerxun A, Ajiguli M, Ainiwaer M, et al. Assessment of heavy metal pollution and its potential ecological risks of farmland soils of oasis in Bosten Lake Basin[J]. Scientia Geographica Sinica, 2017, 72(9):1680-1694.
Liu Z, Zhou H, Chen L, et al. Spatial distribution characteristics and pollution assessment of heavy metals in river surface sediments in a manganese mining area,Western Hubei[J]. Safety and Environmental Engineering, 2020, 27(3):114-121.
Su Y M, Chen Z L, Lei G J, et al. Vertical pollution characteristic and ecological risk assessment of heavy metal of soil profiles in polymetallic ore mine[J]. Ecology and Environmental Sciences, 2016, 25(1):130-134.
Ma X P, Li F Y, Xiao P F, et al. Assessment of heavy metal pollution and characteristics of its spatial distribution in soil near the typical industry area[J]. Journal of Harbin Institute of Technology, 2007, 39(2):326-329.
Maieryemu Y, Mamat S, Nigela T, et al. Distribution of heavy metal pollution and assessment of its potential ecological risks in Ugan-Kuqa River Delta of Xinjiang[J]. Transactions of the Chinese Society of Agricultural Engineering, 2017, 33(20):226-233.
Yang A, Xing W C, Wang X X, et al. Source and risk assessment of heavy metals in surface sediments of rivers,lakes and their surrounding soils in central Tibet[J]. China Environmental Science, 2020, 40(10):4557-4567.