期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 803, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.150029
关键词
Composting; Microplastics; Humification; Fungal community; Cooccurrence networks
资金
- National Natural Science Foundation of China [42007349]
- Key Research and Development Project of Ningxia Hui Autonomous Region [2019BFG02015]
- Key Research and Development Project of Shaanxi Province [2020SF-366]
The study revealed that different microplastics have varying effects on composting humification, with all microplastics reducing fungal community diversity and richness. The addition of certain microplastics also increased the relative abundance of phytopathogenic fungi.
The effect of microplastics (MPs) on the biological treatment of organic waste has been extensively studied, but little is known about the influence of different MPs on composting humification and the fungal community. In this study, PE, PVC, and PHA MPs were individually mixed with cow dung and sawdust and then composted. The results showed that different MPs had various influences on humification, and the humic acid to fulvic acid ratio of all MP-added treatments (0.44-0.83) was lower than that of the control (0.91). During the composting process, Ascomycota (26.32-89.14%) and Basidiomycota (0.47-4.78%) are the dominant phyla in all treatments and all microplastics decreased the diversity and richness of the fungal community at the thermophilic stage of composting. Exposure to MPs had an obvious effect on the fungal community at the genus level, and the addition of PHA and PE MPs increased the relative abundance of phytopathogenic fungi. LEfSe and network analysis indicated that MPs reduced the number of biomarkers and led to a simpler and more unstable fungal community structure compared to the control. This study has important implications for assessing microplastic pollution and organic waste disposal. (c) 2021 Elsevier B.V. All rights reserved.
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