衰老改变了各种微塑料对地中Decabromodiphenyl Ethane生物积累的载体效应
Yanna Han1, Jiaqi Tan2, Mengru Fu1
1State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
Journal of agricultural and food chemistry
|May 20, 2025
概括
来自PLA和PE的紫外线老化微塑料 (MP) 不同地影响地中的甲基乙烯 (DBDPE) 生物积累. 陈旧的PLA-MP增加了肠道DBDPE,而陈旧的PE-MP则减少了它,突出了受污染的土壤中的各种风险.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 聚合物科学 聚合物科学
背景情况:
- 广泛的塑料污染和不当的处置导致了微塑料 (MP) 和新型制阻燃剂 (NBFR) 的共同污染.
- 对于老年国会议员对NBFR生物积累和陆地生态系统中毒性的影响的了解有限.
研究的目的:
- 在土壤-虫模型中,研究紫外线老化聚乳酸 (PLA) 和聚乙烯 (PE) 微塑料对脱甲乙烯 (DBDPE) 的生物积累的影响.
- 阐明老化生物降解和常规MPs对土虫DBDPE吸收的差异影响背后的机制.
主要方法:
- 长达28天,地暴露在受DBDPE和UV老化PLA或PE微塑料污染的土壤中.
- 在肠和整个组织中量化DBDPE生物积累.
- 在土壤中使用SR-FTIR对DBDPE吸附到老年MP的分析.
主要成果:
- 紫外线老化的PLA-MPs由于摄入量增加和土壤吸附量减少,使得土虫肠道中的DBDPE生物积累增加了15%.
- 紫外线老化PE-MPs通过减少吸附和生物膜形成,通过减少吸附和生物膜形成,通过减少21%的肠道DBDPE,增加迁移风险.
- SR-FTIR证实了土组织中MPs和DBDPE的存在,支持MPs对DBDPE生物积累的"载体效应".
结论:
- 衰老过程显著改变了微塑料和NBFR之间的相互作用,导致陆地生物体的生物积累模式分化.
- 可生物降解的PLA-MP作为载体,增加了DBDPE的肠道积累,而碳化合物PE-MP减少了它,但存在迁移风险.
- 这项研究强调了化学污染土壤中老化生物基微塑料与燃料基微塑料所带来的独特环境风险.
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