Aging of polypropylene plastic and impacts on microbial community structure in constructed wetlands

文献类型： 外文期刊

第一作者： Jing, Xinxin

作者： Jing, Xinxin;Shao, Yuanyuan;Wang, Hongbo;Han, Guolan;Zhang, Jian;Wang, Ning;Xu, Jingtao;Liu, Lei;Chen, Gao;Chen, Gao

作者机构：

关键词： Polypropylene; Disposable face mask; Wetland ecosystem; Plastic aging; Plastic microbiota

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.9； 五年影响因子：9.5 ）

ISSN： 0269-7491

年卷期： 2024 年 347 卷

页码：

收录情况： SCI

摘要： The COVID-19 pandemic has resulted in a substantial surge in the usage of disposable plastic masks, generating a significant volume of waste and contributing to environmental pollution. Wetland ecosystems function as crucial repositories for terrestrial pollutants and are highly effective in retaining disposable masks composed mainly of PP material. These masks can endure extended periods in wetlands, experiencing natural degradation that may have potential implications on wetland ecosystems. Our findings demonstrate the natural aging process of disposable masks, resulting in the generation of microplastics (MPs) ranging in diameter from 10 to 30 mu m over a 180 -day timeframe. Examination of 16S rDNA data unveiled temporal fluctuations in microbial diversity in the wetland ecosystem. Initially, microbial diversity displayed a modest incline, which was succeeded by a subsequent decrease. With the progressive accumulation of plastic within the wetland, an ongoing decline in microbial diversity linked to nitrogen transformation was observed. This study provides valuable insights into the retention of disposable masks by wetlands amidst the COVID-19 pandemic, along with their consequential effects on wetland ecosystems, specifically pertaining to nitrogen cycling. It underscores the urgency of augmenting the safeguarding measures for wetland ecosystems.

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