National Research Council of Italy - Water Research Institute (CNR-IRSA) Molecular Ecology Group (MEG), Verbania, Italy.
National Research Council of Italy - Water Research Institute (CNR-IRSA), Verbania, Italy.
J Hazard Mater. 2022 May 5;429:128397. doi: 10.1016/j.jhazmat.2022.128397. Epub 2022 Jan 31.
Although abundant and chemically peculiar, tyre wear microplastic particles (TWP) and their impact on the microbial communities in water are largely understudied. We tested in laboratory based semi-continuous cultures the impact of TWP and of polyethylene terephthalate (PET) derived particles (following a gradient of relative abundance) on the pathobiome (the group of potential human pathogenic bacteria) of a freshwater microbial community exposed to contamination by the effluent of a urban wastewater treatment plant, for a period of 28 days. We could define the modulated impact of the two types of microplastic particles: while PET does not favour bacterial growth, it offers a refuge to several potential pathogens of allochthonous origin (from the treated sewage effluent), TWP act as an additional carbon source, promoting the development and the massive growth of a biofilm composed by fast-growing bacterial genera including species potentially harmful and competitive in abating biodiversity in surface waters. Our results demonstrate the different ecological role and impact on freshwater environments of TWP and PET particles, and the need to approach the study of this pollutant not as a whole, but considering the origin and the chemical composition of the different particles.
尽管轮胎磨损微塑料颗粒（TWP）数量丰富且化学成分特殊，但它们对水体中微生物群落的影响在很大程度上仍未得到充分研究。我们在基于实验室的半连续培养中测试了 TWP 以及源自聚对苯二甲酸乙二醇酯（PET）的颗粒（按照相对丰度的梯度）对淡水微生物群落的pathobiome（一组潜在的人类致病细菌）的影响，该微生物群落暴露于城市污水处理厂的污水流出物污染下，持续了 28 天。我们可以定义这两种类型的微塑料颗粒的调节影响：虽然 PET 不会促进细菌生长，但它为来自处理污水的外来潜在病原体提供了避难所，TWP 则作为额外的碳源，促进了由快速生长的细菌属组成的生物膜的发展和大量生长，其中包括在减少地表水生物多样性方面具有潜在危害和竞争力的物种。我们的结果表明 TWP 和 PET 颗粒对淡水环境具有不同的生态作用和影响，并且需要在研究这种污染物时不仅要考虑其整体，还要考虑其来源和不同颗粒的化学成分。
