State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Environ Res. 2022 Apr 15;206:112277. doi: 10.1016/j.envres.2021.112277. Epub 2021 Oct 26.
Agricultural soil pollution in China poses a major threat to human health and food safety. There are no agricultural soil environmental standards based on human health in China, which prevents effective screening and assessment of risks. Jiangsu (JS) and Zhejiang (ZJ) provinces, located in the Yangtze River Delta (YRD) core region, have obvious differences in agricultural land conditions, which will result in differences in Generic Assessment Criteria (GAC). In this study, we derived and compared human health risk-based GAC using the Contaminated Land Exposure Assessment (CLEA) model for agricultural land scenarios in these two provinces. We found differences in the GAC between JS and ZJ due to differences in parameters. These differences are greatest for benzene, and cadmium (Cd). For Cd, the contribution of oral intake exceeds 90 %, and the vegetable consumption rate and mean daily intake (MDI) may be key parameters affecting GAC. For the volatile organic compound benzene, the inhalation of indoor vapor accounts for about 30 %, and the key parameters affecting the GAC for benzene may be the attenuation factor and soil organic matte (SOM). The derived GAC are generally lager (i.e., less stringent) than the GB15618-2018 and UK Suitable 4 Use Levels (S4ULs); however, the derived GAC for JS and ZJ were lower than the soil screening values (SSV) for residential land in China. This may be related to methods, land use types, and critical receptors. This work will contribute to the development of regional soil environmental standards in China.
中国农业土壤污染对人类健康和食品安全构成重大威胁。中国没有基于人类健康的农业土壤环境标准，这使得对风险进行有效筛选和评估变得困难。位于长江三角洲核心区域的江苏（JS）和浙江（ZJ）两省的农业用地条件存在明显差异，这将导致通用评估标准（GAC）存在差异。在本研究中，我们使用污染土地暴露评估（CLEA）模型，针对两省的农业用地情景，推导出并比较了基于人类健康风险的 GAC。我们发现，JS 和 ZJ 之间的 GAC 存在差异，这是由于参数不同所致。这些差异在苯和镉（Cd）方面最大。对于 Cd，口服摄入的贡献超过 90%，蔬菜食用率和平均每日摄入量（MDI）可能是影响 GAC 的关键参数。对于挥发性有机化合物苯，室内蒸气的吸入占 30%左右，影响 GAC 的关键参数可能是衰减因子和土壤有机质（SOM）。推导出的 GAC 通常比 GB15618-2018 和英国适宜 4 用水平（S4ULs）更宽松；然而，JS 和 ZJ 的 GAC 低于中国住宅用地的土壤筛选值（SSV）。这可能与方法、土地利用类型和关键受体有关。这项工作将有助于中国制定区域性土壤环境标准。
