Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
Zhuhai Environmental Protection Monitoring Station, Zhuhai, 519000, People's Republic of China.
Arch Environ Contam Toxicol. 2019 Feb;76(2):295-307. doi: 10.1007/s00244-018-00590-w. Epub 2019 Jan 1.
The purpose of this study was to evaluate the current status of metal concentrations in soil from Zhuhai City. We detected the concentrations of eight metal elements in 67 topsoil samples collected from three typical land use types (water source land, n = 27; industrial land, n = 25; and farmland, n = 15) in Zhuhai. Multivariate geostatistical analyses indicated that the concentrations of Cu, Zn, and Cd may have originated from anthropogenic sources, whereas Pb and As mostly originated from natural sources. Additionally, Cr, Ni, and Hg may have come from mixed sources. The pollution index and the potential ecological risk were used to identify the general contamination characteristics of soil metals. The soil samples from industrial land were more polluted (60% of soil samples in industrial land were unpolluted to moderately polluted, and 40% were moderately polluted) and posed greater risk (28.6% of industrial soil samples were very high risk, and 71.4% were considerable risk) than samples from water source land and farmland. On the whole, the health risks posed by soil metals were acceptable or close to tolerable, and Cd was the most important pollutant contributing to human health risks. Comparatively speaking, children were the most vulnerable population to the non-carcinogenic and carcinogenic risks of contaminated soils from industrial land. Our results provide fundamental information for improving soil environmental management and metal pollution prevention and control in Zhuhai City.
本研究旨在评估珠海市土壤中金属浓度的现状。我们检测了珠海市三种典型土地利用类型（水源地、工业用地和农田）共 67 个表层土壤样本中 8 种金属元素的浓度。多元地质统计分析表明，Cu、Zn 和 Cd 的浓度可能来自人为源，而 Pb 和 As 主要来自自然源。此外，Cr、Ni 和 Hg 可能来自混合源。污染指数和潜在生态风险用于识别土壤金属的一般污染特征。工业用地土壤样本污染程度更高（工业用地土壤样本中有 60%为无污染到中度污染，40%为中度污染），风险更大（工业土壤样本中有 28.6%为极高风险，71.4%为严重风险），而水源地和农田的土壤样本风险较小。总的来说，土壤金属对健康的风险是可接受或接近可接受的，Cd 是对人类健康风险贡献最大的污染物。相比之下，儿童是工业区受污染土壤的非致癌和致癌风险最易受影响的人群。我们的研究结果为改善珠海市土壤环境管理和金属污染防控提供了基础信息。
