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Different functional areas and human activities significantly affect the occurrence and characteristics of microplastics in soils of the Xi'an metropolitan area

文献类型： 外文期刊

作者： Chen, Hao 1 ; Chen, Yanhua 2 ; Xu, Yibo 1 ; Xiao, Chuanqi 1 ; Liu, Jincheng 1 ; Wu, Renren 4 ; Guo, Xuetao 1 ;

作者机构： 1.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resources & Environm, Beijing 100097, Peoples R China

3.Minist Agr, Key Lab Plant Nutr & Agroenvironm Northwest China, Yangling 712100, Shaanxi, Peoples R China

4.MEE, South China Inst Environm Sci, State Environm Protect Key Lab Water Environm Simu, Guangzhou 510655, Peoples R China

关键词： Microplastics; Functional areas; The Xi'an metropolitan area; Soil; Abundance

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）

ISSN： 0048-9697

年卷期： 2022 年 852 卷

页码：

收录情况： SCI

摘要： Microplastics (MPs) pollution in the environment has become a global hotspot, but there is insufficient research on MPs in soils of large cities. This study investigated the pollution status of MPs in soils in different functional areas (com-mercial, tourist, industrial, and residential areas) of the Xi'an metropolitan area. The average abundances of MPs were 2218 items/kg in Xi'an city, 1329 items/kg in Xianyang city and 1400 items/kg in Yangling city. All MPs presented different shapes and were dominated by fragment and fiber. The 0-0.5 mm MPs accounted for the largest proportion. Polyethylene terephthalate (PET) was the predominant polymer type for MPs. The results showed that the soil in the Xi'an metropolitan area was polluted by MPs, with the pollution of MPs in Xi'an city being more severe than other two cities. This could be related to the advanced urbanization and industrialization process. Moreover, industrial and tour-ist areas had frequent industrial and human activities, so their MPs pollution was the worst. In addition, residential areas and some commercial areas far away from pollution sources had lower pollution levels and a more uniform distribution of MPs. This study may provide data and valuable reference for the investigation of soil MPs pollution in the Xi'an metropolitan area.

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