School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, PR China; School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Panyu District, Guangzhou 510006, PR China.
School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, PR China.
Ecotoxicol Environ Saf. 2019 Jan 15;167:76-82. doi: 10.1016/j.ecoenv.2018.10.001. Epub 2018 Oct 8.
Samples of soil, earthworms, and tree roots from the forest ecosystem in the Dexing Pb/Zn mining area of Jiangxi Province were collected and the status of trace metal pollution analyzed to assess potential ecological risks. Chemometric and geographic information system methods were used to identify and describe the spatial distributions and the main contamination sources of trace metals. The order of potential ecological risks of trace metals in this area are as follows: cadmium (Cd) > arsenic (As) > copper (Cu) > nickel (Ni) > lead (Pb) > chromium (Cr) > zinc (Zn). Elemental spatial distribution maps showed the existence of zones heavily polluted by trace metals around the mining area. Earthworms and roots of three tree species were also heavily contaminated, with concentrations of trace metals in earthworms much higher than in previous studies. The potential ecological risk index and other soil quality indices indicated that soil had moderate to severe contamination and there were high ecological risks, with Cd making the greatest contribution. Multivariate statistical analyses showed that Cd, As, Cu, Pb, and Zn in soil came from a mining activity source, whereas Ni and Cr primarily originated from a natural source.
采集了江西省德兴市 Pb/Zn 矿区森林生态系统的土壤、蚯蚓和树根样本，分析了痕量金属污染状况，以评估潜在的生态风险。采用化学计量学和地理信息系统方法来识别和描述痕量金属的空间分布和主要污染源。该地区痕量金属的潜在生态风险顺序如下：镉（Cd）>砷（As）>铜（Cu）>镍（Ni）>铅（Pb）>铬（Cr）>锌（Zn）。元素空间分布图显示了矿区周围存在痕量金属重度污染区。三种树种的蚯蚓和根系也受到了严重污染，蚯蚓体内的痕量金属浓度明显高于以往的研究。潜在生态风险指数和其他土壤质量指数表明，土壤受到了中度到重度污染，存在很高的生态风险，其中 Cd 的贡献最大。多元统计分析表明，土壤中的 Cd、As、Cu、Pb 和 Zn 来自采矿活动源，而 Ni 和 Cr 主要来自自然源。
