State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, People's Republic of China.
Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, People's Republic of China.
Environ Sci Pollut Res Int. 2017 Nov;24(31):24387-24399. doi: 10.1007/s11356-017-0052-9. Epub 2017 Sep 10.
In November 2016, the total metal concentrations in nine representative locations in lead (Pb)-zinc (Zn) mining areas, located in Guangdong Province, South China, were determined experimentally by flame atomic absorption spectrometer. The results indicated that the paddy soils were heavily contaminated with Cd (20.25 mg kg), Pb (1093.03 mg kg), and Zn (867.0 mg kg), exceeding their corresponding soil quality standard values and background values. According to the results, the mean enrichment factor levels of the studied metals decreased in the following order: Cd > Zn > Pb > Cu > Ni > Mn > Cr. Among these metals, Cd, Pb, and Zn were predominantly influenced by widespread anthropogenic activities. The highest concentrations of the studied metal pollutants were distributed in the areas surrounding the mining activity district. Multivariate statistical analysis indicated that the major contributing sources of the studied metals were metal ore mining, smelting, and processing activities. However, the composition of soil background was another potential source. Moreover, the assessment results of environment risks showed that the potential ecological risks, in decreasing order, were Cd > Pb > Zn > Cu > Ni > Cr > Mn. Additionally, the non-carcinogenic risk represented the trend of HI > HI > HI > HI , and the carcinogenic risk ranked as CR > CR > CR . Among the environmental risk substances, Cd and Pb were the main contributors that pose ecological harm and health hazards through their serious pollution. Consequently, greater attention should be paid to this situation.
2016 年 11 月，采用火焰原子吸收分光光度计法，对华南广东省铅锌矿区 9 个典型采样点的土壤重金属总量进行了实验测定。结果表明，矿区稻田土壤受到了严重的 Cd（20.25mg/kg）、Pb（1093.03mg/kg）和 Zn（867.0mg/kg）污染，超过了相应的土壤质量标准值和背景值。由此可知，研究金属的平均富集因子水平按以下顺序降低：Cd＞Zn＞Pb＞Cu＞Ni＞Mn＞Cr。在这些金属中，Cd、Pb 和 Zn 主要受广泛的人为活动影响。研究金属污染物的最高浓度分布在矿区周围地区。多元统计分析表明，研究金属的主要来源是金属矿开采、冶炼和加工活动。然而，土壤背景的组成也是另一个潜在的来源。此外，环境风险评估结果表明，潜在生态风险依次为 Cd＞Pb＞Zn＞Cu＞Ni＞Cr＞Mn。此外，非致癌风险呈现 HI ＞HI ＞HI ＞HI 的趋势，致癌风险则为 CR ＞CR ＞CR 。在环境风险物质中，Cd 和 Pb 是造成生态危害和健康危害的主要污染物，其严重污染应引起高度重视。
