Li Ning, Li Yan, Wang Genmei, Zhang Huanchao, Zhang Xiangling, Wen Jiale, Cheng Xinyu
Collaborative Innovation Center of Sustainable Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China.
Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai, China.
Environ Sci Pollut Res Int. 2022 Jul;29(33):50717-50726. doi: 10.1007/s11356-022-19325-5. Epub 2022 Mar 3.
With the rapid economic development, potentially toxic elements (PTEs) are continuously migrating, transforming, and enriching in farmland through atmospheric deposition and other media, posing threats to food security and human health. At present, there are few quantitative studies on the health risks of PTEs sources in farmland. In this study, absolute principal component score-multiple linear regression (APCS-MLR) receptor model was used to quantify the pollution sources of PTEs in farmland in Suzhou of Yangtze River Delta Economic Zone, China. Combined with geoaccumulation index (I) and health risk assessment model, the source risk of PTEs was further quantified. The results show that Cd has reached the level of unpolluted to moderate polluted (0 < I < 1); the total hazard index (THI) and total carcinogenic risk (TCR) index of PTEs are acceptable for adults, but not for children (THI > 1, TCR > 1 × 10). The results of APCS-MLR source apportionment were industrial sources (25.65%), agricultural sources (20.00%), traffic sources (16.81%), and domestic pollution sources (9.71%). The I values of all pollution sources were less than 0, and no ecological risk was caused. The contribution patterns of pollution sources to THI and TCR in adults and children are similar. Industrial pollution sources pose the greatest non-carcinogenic risk to humans, accounting for 47.35% and 47.26% of adults and children, respectively; for carcinogenic risks, domestic pollution sources contribute the most among all identified pollution sources, accounting for 27.71% and 27.73% of adults and children, respectively. In general, this study emphasizes the need to strengthen the supervision of industrial pollution sources and domestic pollution sources in the study area to reduce the health risks to children.
随着经济的快速发展，潜在有毒元素（PTEs）通过大气沉降等介质在农田中不断迁移、转化和富集，对粮食安全和人类健康构成威胁。目前，关于农田中PTEs来源健康风险的定量研究较少。本研究采用绝对主成分得分-多元线性回归（APCS-MLR）受体模型对长江三角洲经济区苏州市农田中PTEs的污染源进行量化。结合地累积指数（I）和健康风险评估模型，进一步量化了PTEs的源风险。结果表明，Cd已达到未污染至中度污染水平（0 < I < 1）；PTEs的总危害指数（THI）和总致癌风险（TCR）指数对成年人来说是可接受的，但对儿童来说不可接受（THI > 1，TCR > 1×10）。APCS-MLR源解析结果为工业源（25.65%）、农业源（20.00%）、交通源（16.81%）和生活污染源（9.71%）。所有污染源的I值均小于0，未造成生态风险。污染源对成年人和儿童THI和TCR的贡献模式相似。工业污染源对人类的非致癌风险最大，分别占成年人和儿童的47.35%和47.26%；对于致癌风险，生活污染源在所有已识别的污染源中贡献最大，分别占成年人和儿童的27.71%和27.73%。总体而言，本研究强调需要加强对研究区域内工业污染源和生活污染源的监管，以降低对儿童的健康风险。
