传统和可生物降解的渔网漏物在人工老化后具有明显的毒性概况
Edgar Dusacre1, Coralie Le Picard2, Valerian Hausard2
1Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, Pessac F-33600, France; Faculty of Science and Technology and Research Center for Experimental Marine Biology and Biotechnology PiE, University of the Basque Country UPV/EHU, Basque Country, Spain; CBET Research Group, Dept. Zoology and Animal Cell Biology, University of the Basque Country UPV/EHU, Basque Country, Spain.
Journal of hazardous materials
|February 15, 2025
概括
渔网降解为微塑料 (MNP),并释放有机化合物,极端条件导致大量的MNP产量. 来自生物降解网的液对海洋细菌和鱼幼虫有更高的毒性,表明有机化合物是主要的毒性驱动因素.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 材料科学 材料科学 材料科学
背景情况:
- 渔网是塑料污染的主要来源.
- 纳米塑料对微型和纳米塑料 (MNP) 和相关的添加物污染的贡献尚不清楚.
- 不同渔网材料的降解和生态毒性需要调查.
研究的目的:
- 调查高性能聚乙烯-聚烯 (HPPE-PP),聚胺6 (PA6) 和可生物降解的聚乙烯-酸盐-聚酸盐-酸盐-甲酸 (PBS-PBAT) 渔网的降解情况.
- 在加速老化 (AA) 条件下评估MNP释放和有机化合物液.
- 评估液对海洋细菌 (Allivibrio fischeri) 和鱼幼虫 (Oryzias latipes) 的生态毒性.
主要方法:
- 加速人工老化 (AA) 使用紫外线照射和水中的机械磨损.
- 从老年网中释放的微塑料颗粒 (MP) 的量化.
- 在液中识别和定量有机化合物.
- 使用生物发光抑制试验对细菌进行毒性测试,并对鱼幼虫进行行为分析.
主要成果:
- 极端的AA条件从PA6 (9.1 × 104 MP/mL) 和PBS-PBAT (2.0 × 104 MP/mL) 网中产生了显著的MNP.
- 总共释放了27种有机化合物,其度高达200μg/L.
- PBS-PBAT浸出物表现出显著的细菌毒性 (2656%的生物发光抑制).
- 所有老FN的液破坏了鱼幼虫的行为,PBS-PBAT造成了最高的压力.
结论:
- 渔网液的毒性主要与释放的有机化合物有关,而不是MNP.
- 可生物降解的网,虽然旨在环保,但可能会带来生态毒理风险.
- 在广泛采用之前,对生物基和生物降解FN的进一步评估至关重要.
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