Yang Jie, Teng Yanguo, Wu Jin, Chen Haiyang, Wang Guoqiang, Song Liuting, Yue Weifeng, Zuo Rui, Zhai Yuanzheng
College of Water Science, Beijing Normal University, Beijing 100875, China.
College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China.
Chemosphere. 2017 Mar;171:635-643. doi: 10.1016/j.chemosphere.2016.12.058. Epub 2016 Dec 13.
A detailed assessment of vanadium contamination characteristics in China was conducted based on the first national soil pollution survey. The map overlay analysis was used to evaluate the contamination level of vanadium and the non-carcinogenic risk assessment model was calculated to quantify the vanadium exposure risks to human health. The results showed that, due to the drastically increased mining and smelting activities, 26.49% of soils were contaminated by vanadium scattered in southwest of China. According to Canadian soil quality guidelines, about 8.6% of the national soil pollution survey samples were polluted, and pose high non-carcinogenic risks to the public, especially to children living in the vicinity of heavily polluted mining areas. We propose the area near the boundary of Yunnan, Guizhou, Guangxi, and Sichuan provinces as priority control areas due to their higher geochemical background or higher health risks posed to the public. Finally, recommendations for management are proposed, including minimization of contaminant inputs, establishing stringent monitoring program, using phytoremediation, and strengthening the enforcement of relevant laws. Therefore, this study provides a comprehensive assessment of soil vanadium contamination in China, and the results will provide valuable information for China's soil vanadium management and risk avoidance.
基于首次全国土壤污染调查，对中国钒污染特征进行了详细评估。采用地图叠加分析来评估钒的污染水平，并计算非致癌风险评估模型以量化钒对人体健康的暴露风险。结果表明，由于采矿和冶炼活动急剧增加，中国西南部26.49%的土壤受到钒污染。根据加拿大土壤质量指南，约8.6%的全国土壤污染调查样本受到污染，对公众尤其是居住在重污染矿区附近的儿童构成高非致癌风险。由于云南、贵州、广西和四川省边界附近地区具有较高的地球化学背景或对公众构成较高的健康风险，我们建议将其作为优先控制区域。最后，提出了管理建议，包括减少污染物输入、建立严格的监测计划、采用植物修复以及加强相关法律的执行。因此，本研究对中国土壤钒污染进行了全面评估，结果将为中国土壤钒管理和风险规避提供有价值的信息。
