在微塑料中添加剂衍生的有机酸的化动力学和生物积累潜力
Bingbing Sun1, Chang Zhou2, Ming Zhu1
1State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510530, China.
Environmental pollution (Barking, Essex : 1987)
|March 5, 2024
概括
这项研究调查了在模拟的肠道条件下,有机酸盐 (OPFR) 如何从微塑料 (MP) 中漏. 聚乙烯MP显著增加了OPFR生物积累在虫,与聚烯和聚烯MP不同.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 聚合物科学 聚合物科学
背景情况:
- 微塑料 (MP) 是水生生物中危险污染物转移的已知的载体.
- 在模拟的消化环境中,MPs的添加剂衍生污染物的化学释放存在有限的研究.
研究的目的:
- 从聚烯 (PP) 和聚烯 (PS) MPs中量化有机酸盐 (OPFR) 的液动力学.
- 评估肠道表面活性剂和温度对OPFR释放和随后的生物积累的影响.
- 评估不同类型的MP在海洋生物中的OPFR生物积累中的作用.
主要方法:
- 模拟的海洋肠道条件使用陶酸盐表面活性剂在两个相关的温度.
- 从PP和PSMP测量OPFR漏动力学和扩散系数.
- 生物动力学模型分析,结合B3LYP/6-31G (d,p) 计算来预测生物积累因子.
- 试验评估OPFR生物积累在暴露于各种MP的虫中的OPFR生物积累.
主要成果:
- 对OPFR的扩散系数在PP (1.71 × 10−204.04 × 10−18 m2 s−1) 和PS (2.91 × 10−181.51 × 10−15 m2 s−1) 之间有显著的差异.
- 对OPFRs的积累因子显示出复杂的剂量依赖反应,更高的MP度有时会降低生物积累.
- 聚乙烯 (PE) MPs显著增强了虫中的OPFR生物积累,而PP和PS MPs的影响最小.
结论:
- 微塑料的类型显著影响了有机酸盐的浸出和生物积累.
- 与PP和PS相比,聚乙烯MP在海洋无脊椎动物中对OPFR生物积累的风险更大.
- 环境因素,如MP度和化学亲和力,可以调节海洋生态系统中的OPFR转移动态.
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