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开发一种新的聚合方法,从海洋中去除纳米塑料:使用贝暴露测试的概念证明

Antonio Cid-Samamed¹, Catarina S E Nunes^2,3, Cristina Lomas Martínez⁴

¹Physical Chemistry Department, Faculty of Sciences, University of Vigo, Campus de As Lagoas S/N, 32004 Ourense, Spain.

Biomimetics (Basel, Switzerland)

|May 24, 2024

概括

这项研究开发了一种聚合微塑料和纳米塑料 (MNP) 的技术,以便更容易从海洋环境中去除. 该技术有效地聚合了纳米塑料,但没有微塑料,并揭示了MNP在贝中诱导氧化应激.

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:

塑料污染,特别是微塑料 (MP) 和纳米塑料 (NP),对海洋生态系统构成重大威胁.
由于MP和NP的小尺寸,它们很难被检测和移除,导致与海洋生物的相互作用.
了解MP和NP的聚合行为和毒理影响对于制定缓解策略至关重要.

研究的目的:

开发和评估聚合微塑料和纳米塑料 (MNP) 的技术,以促进它们从海洋环境中去除.
为了评估表面电荷对聚乙烯 (PS) MNPs的聚合效率的影响,使用离子液和奇托桑.
研究MP和NP对海洋鱼物种*M. galloprovincialis*的毒理影响,重点关注氧化应激和组织学变化.

主要方法:

聚乙烯 (PS) MPs和氨基功能化NP (PS NP-NH2) 被合成和特征化.
在合成海水中测量了PS MNPs的大小和稳定性,其中含有不同度的离子液体和酸盐.
贝类 (*M. galloprovincialis*) 暴露在不同度的PS MPs和PS NP-NH2中,使用和不使用聚合技术,持续21天.
分析了氧化应激生物标志物 (ROS产生) 和鱼和消化腺体的组织学变化.

主要成果:

开发的技术显著促进了PS NP-NH2的聚合,但对于PS MPs没有显示出确的结果,强调了MNP聚合中表面电荷的重要性.
暴露于MP和NP诱导了鱼的活性氧物种 (ROS) 生产和氧化应激,是受影响最严重的器官.
组织学分析显示,状组织中没有MNP的证据,并且在这种技术下,NPs的中度度对鱼有不良影响.

结论:

开发的技术对聚合纳米塑料具有前景,但其对微塑料的有效性需要进一步研究,强调表面性质的作用.
微塑料和纳米塑料对海洋生物产生毒理作用,主要是通过在等重要器官中诱导氧化应激.
虽然该技术有助于MNP聚合,但在中度度下潜在的不良影响需要在海洋环境中仔细应用.

关键词:

梅虫 (Mytilus galloprovincialis) 是一个省份的植物.离子液体是一种离子液体.微塑料微塑料的使用纳米塑料是一种纳米塑料.氧化应激是一种氧化应激.聚乙烯是一种聚乙烯.

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