<br>土壤藻类作为纳米塑料的潜在载体：纳米塑料在藻类细胞中的吸附和内化,Science of the Total Environment

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土壤藻类作为纳米塑料的潜在载体：纳米塑料在藻类细胞中的吸附和内化
Science of the Total Environment ( IF 8.2 ) Pub Date : 2022-05-11 , DOI: 10.1016/j.scitotenv.2022.155678
Sun-Hwa Nam ₁ , Dokyung Kim ₁ , Youn-Joo An ₁

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尽管塑料在土壤环境中广泛分布，但很少有研究评估它们对不同测试物种的影响。在这项研究中，通过显微镜分析评估了两种绿藻物种（Chlorococcum infusion和Chlamydomonas reinhardtii）对土壤中纳米塑料的反应（吸附或内化），为期 9 周;此外，还评估了聚苯乙烯（PS）纳米塑料对其光合活性和生长的影响。结果表明，PS 纳米塑料和 C. infusion或 C. reinhardtii 细胞聚集，形成棕榈状菌落;此外，还验证了 PS 纳米塑料内化到 C. reinhardtii 细胞中。然而，未观察到 PS 纳米塑料对土壤藻类的光合活性和生长有显着影响。藻类比在水生环境中更容易受到塑料聚集的威胁，因为它们的细胞上形成了粘液鞘。我们的结果强调，由于塑料通过吸附或内化聚集，土壤藻类是纳米塑料到食物链中其他生物的潜在载体。这项研究将增强我们对土壤藻类中纳米塑料分布的理解。

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Soil algae as a potential carrier for nanoplastics: Adsorption and internalization of nanoplastics in algal cells

Although plastics are widely distributed in soil environments, few studies have assessed their effects on different test species. In this study, the responses (adsorption or internalization) of two green algal species (Chlorococcum infusionum and Chlamydomonas reinhardtii) to nanoplastics in soil were evaluated via microscopic analysis for nine weeks; additionally, the effects of polystyrene (PS) nanoplastics on their photosynthetic activity and growth were assessed. The results showed that PS nanoplastics and C. infusionum or C. reinhardtii cells were aggregated with the formation of palmelloid colonies; additionally, internalization of PS nanoplastics to C. reinhardtii cells was verified. However, no significant effects of PS nanoplastics on photosynthetic activity and growth of soil algae were observed. Algae were more likely to be threatened by plastic aggregation in the soil environment than in the aquatic environment due to the formation of a mucilaginous sheath on their cell. Our results highlighted that soil algae are a potential carrier of nanoplastics to other organisms in the food chain due to plastic aggregation through adsorption or internalization. This study will enhance our understanding of nanoplastic distribution in soil algae.

更新日期：2022-05-11

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