垃圾堆周边土壤微塑料及潜在病原微生物特征

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Abstract To explore the microplastic pollution and potential pathogen risk in the surrounding soil caused by rural garbage stacking, the soil samples around a typical rural garbage dump in Guizhou province were collected for analysis. The microbial community and functional changes in soil, including viruses and pathogens, were studied by metagenomic technology. Combined with the distribution characteristics of microplastics, the potential interaction between microorganisms and microplastics was explored. The results showed that microplastics were detected in all soil samples with the abundance ranging from 1796~13702 /kg. A total of 20 kinds of microplastics were detected, including polypropylene (PP), silicone resin and polyurethane (PU), etc. The microplastics particle size were mainly£100μm with a proportion of 88.55%. The soil microbial community belonged to 214 phyla, and 1336 families, of which Proteobacteria was the dominant phyla. The main soil viruses were Siphoviridae and Podoviridae. A total of 191 potential soil pathogens have been found, including Salmonella enterica, Pseudomonas aeruginosa, Xanthomonas oryzae, etc. LefSe analysis showed that β-proteobacteria and γ-proteobacteria were the indicator bacteria in the proximal area, while α-proteobacteria were key bacteria in the distant area. Iridovirus and Pandoravirus were the biomarkers of the proximal region. The results of correlation analysis showed that microplastics in the garbage contaminated soil might affect the composition of microbial community and the aggregation of pathogens, while PET had the most significant effect on microbial community and metabolic function.

Key words： rural garbage soil microplastics metagenome pathogen

Received: 27 November 2022

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	JIANG Juan
	LONG Yun-chuan
	HU Jing
	WANG Long-yan

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JIANG Juan,LONG Yun-chuan,HU Jing等. Characteristics of microplastics and potential pathogenic microorganisms in the soil surrounding a rural garbage dump[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(7): 3592-3603.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I7/3592

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