用高空间时间分辨率的化学暴露分析模型来推导亚洲河流中的一级暴露评估的稀释因子
Mariko Okada1, Michihiro Murata2, Takahiro Suzuki1
1Safety Science Research, Kao Corporation, Tochigi, Japan.
Environmental toxicology and chemistry
|July 29, 2025
概括
亚洲河流中家用化学品的稀释系数 (DFs) 为直接排放和废水处理厂 (WWTP) 场景计算. 直接排放的破坏性因素较高,但这两者对于准确的环境风险评估至关重要.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 风险评估 风险评估
背景情况:
- 人们越来越担心消费化学品对环境的影响.
- 在环境风险评估中,缺乏直接排放场景的稀释系数 (DF).
- 需要高分辨率数据来准确评估暴露.
研究的目的:
- 导出亚洲9个国家的101条河流在两个排放场景:直接排放和废水处理厂 (WWTPs) 的 DF.
- 为下水道化学品环境风险评估的第一层提供必要的数据.
- 评估线性基硫酸盐 (LAS) 的环境风险,使用衍生DFs.
主要方法:
- 利用全球-香奈儿亚洲模型进行河流流量和化学度分析.
- 在高空间分辨率 (1x1公里) 计算了DFs,用于直接和WWTP排放场景.
- 在低流量条件下,从第5百分位数开始确定DFs,以表示现实的最坏情况值.
主要成果:
- 直接排放 (第5个百分点:64-5100) 和WWTP排放 (第5个百分点:1.3-4.2) 的衍生 DF.
- 直接排放场景产生了比WWTP场景更高的DF.
- 在一些地区的直接排放场景中,LAS的预测环境度更高,这表明潜在的风险.
结论:
- 环境风险评估必须考虑直接排放和WWTP场景进行全面评估.
- 直接排放可能导致更高的局部化学度,需要进行具体评估.
- 这项研究为亚洲高度地区的化学品初步风险评估提供了基础数据.
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