Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
Environ Pollut. 2022 Aug 1;306:119395. doi: 10.1016/j.envpol.2022.119395. Epub 2022 May 4.
Bio-based plastics have been developed as alternative materials to solve the energy crisis brought by plastic production, but their impacts on soil ecosystems (e.g. plant and microorganisms) remain largely unknown. Here, we conducted study on the impacts of polyethylene 2,5-furan-dicarboxylate (PEF), a new bio-based plastic, on the plant-soil ecosystem, with comparison of fossil-based plastic polyethylene terephthalate (PET). Our investigation showed that, after 21 days exposure to microplastics (MPs) at doses of 0.5%, 1% and 2%, both PEF and PET MPs inhibited the growth of lettuce, where chlorophyll was found to be the most sensitive index. According to the comprehensive stress resistance indicators, PET MPs showed more severe phytotoxicity than PEF MPs. Although both PEF and PET MPs could inhibit soil enzyme activities, PET MPs exhibited significantly reduction on the diversity of rhizosphere soil bacterial community and changed the relative abundance of dominant species. Our study gave insights into the effects of PEF and PET MPs on the plant-soil system, where bio-based PEF MPs showed more friendly interaction with plant and soil than fossil-based PET MPs. Our results provided scientific data for risk assessment and useful information for the prospective application of bio-based plastics.
生物基塑料已被开发为替代材料，以解决塑料生产带来的能源危机，但它们对土壤生态系统（如植物和微生物）的影响在很大程度上仍不清楚。在这里，我们研究了新型生物基塑料 2,5-呋喃二甲酸聚乙烯（PEF）对植物-土壤生态系统的影响，并与基于化石的塑料聚对苯二甲酸乙二醇酯（PET）进行了比较。我们的研究表明，在微塑料（MPs）浓度为 0.5%、1%和 2%下暴露 21 天后，PEF 和 PET MPs 均抑制了生菜的生长，其中叶绿素被发现是最敏感的指标。根据综合胁迫抗性指标，PET MPs 比 PEF MPs 表现出更严重的植物毒性。尽管 PEF 和 PET MPs 均可抑制土壤酶活性，但 PET MPs 显著降低了根际土壤细菌群落的多样性，并改变了优势种的相对丰度。我们的研究深入了解了 PEF 和 PET MPs 对植物-土壤系统的影响，其中生物基 PEF MPs 与植物和土壤的相互作用比基于化石的 PET MPs 更为友好。我们的结果为风险评估提供了科学数据，并为生物基塑料的预期应用提供了有用信息。
