使用双标记生物积累方法量化微塑料载体对土壤中疏水性有机污染物的作用
Jie Wang1, Jianguo Tao1, Jianghao Ji1
1Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
ACS environmental Au
|July 24, 2023
概括
一种新的双标签方法量化了微塑料载体对地中有毒化学物质生物积累的影响. 较高的微塑料度显著增加了污染物的吸收,揭示了影响这种环境风险的关键因素.
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:
- 众所周知,微塑料含有有毒化学物质,但缺乏量化方法来评估它们对生物积累的载体影响.
- 现有的 in vitro 和 in vivo 方法无法直接测量微塑料在污染物转移到生物体中的作用.
研究的目的:
- 开发和验证一种新的双标签方法,用于定量确定微塑料对疏水性有机污染物 (HOC) 生物积累的载体效应.
- 研究微塑料度,聚合物特性和高氧化物疏水性对虫中的污染物生物积累的影响.
主要方法:
- 一种使用未标记的HOCs在土壤中的双标记方法和在微塑料中的同位素标记的HOCs.
- 暴露 *Eisenia fetida* 虫在不同度的微塑料 (0.1%和1%) 污染的土壤中.
- 通过皮肤吸收,土壤摄入和微塑料摄入,标记和未标记的HOCs生物积累的比较.
主要成果:
- 在1%微塑料 (15.5-55.8%) 的土壤中,与0.1%的微塑料相比,生物积累的同位素标记HOC的相对比例显著更高.
- 聚乙烯微塑料的相对分数较高,这与它们的疏水性和无形状态有关.
- 微塑料度是载体效应的主要驱动因素,其次是聚合物特性和HOC疏水性.
结论:
- 拟议的双标签方法提供了对微塑料载体影响的直接和定量评估.
- 微塑料的度和特性显著增强了地中高氧化碳的生物积累.
- 这项研究为了解生态系统中微塑料媒介污染物运输提供了至关重要的工具.
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