Xie Li, Li Xuemei, Bao Liangwen, Zhang Yuexin, Su Hailei, Liu Xuesong, Wang Fanfan, Wei Yuan, Ji Ningning, Zhou Min
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
College of Environmental Science and Engineering, Liaoning Technical University, Fuxin 123032, China.
Toxics. 2025 Feb 27;13(3):173. doi: 10.3390/toxics13030173.
Dieldrin is legacy organochlorine insecticide, which was listed in the Stockholm Convention because of its persistence, bioaccumulation and toxicity. However, it is still present in the environment and in organisms two decades after its ban. The current criteria used for risk assessment in China are based on acute toxicity data in water columns without considering the bioavailability and bioaccumulation, which accordingly lead to the under-protection of aquatic organisms and wildlife. In this study, the water quality criteria (WQC) for dieldrin were derived from a combination of tissue-based toxicity data and the bioaccumulation factor (BAF) to better protect aquatic ecosystems. The dieldrin residue data in surface water in China were obtained by literature review and the ecological risk was assessed using the quotient method. Combined with a BAF of 58,884.37 L/kg estimated by the model, the WQC were calculated as needing to be 3.86 and 1.4 ng/L to protect aquatic life and aquatic-dependent wildlife, respectively. The results of the risk assessment revealed the potential high risk posed by dieldrin bioaccumulation. This study provides scientific guidance for the determination of the water quality standard for dieldrin and to ensure the risk management of the aquatic environment in China.
狄氏剂是一种遗留的有机氯杀虫剂，因其持久性、生物累积性和毒性而被列入《斯德哥尔摩公约》。然而，在其被禁用二十年后，它仍存在于环境和生物体中。中国目前用于风险评估的标准基于水柱中的急性毒性数据，而未考虑生物有效性和生物累积性，因此导致对水生生物和野生动物的保护不足。在本研究中，狄氏剂的水质标准（WQC）是通过基于组织的毒性数据和生物累积因子（BAF）相结合得出的，以更好地保护水生生态系统。通过文献综述获取了中国地表水的狄氏剂残留数据，并使用商值法评估了生态风险。结合模型估算的58,884.37 L/kg的生物累积因子，计算得出保护水生生物和依赖水生生物的野生动物的水质标准分别为3.86和1.4 ng/L。风险评估结果揭示了狄氏剂生物累积带来的潜在高风险。本研究为确定狄氏剂水质标准以及确保中国水环境的风险管理提供了科学指导。
