Different functional areas and human activities significantly affect the occurrence and characteristics of microplastics in soils of the Xi'an metropolitan area
Different functional areas and human activities significantly affect the occurrence and characteristics of microplastics in soils of the Xi'an metropolitan area
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DOI：
10.1016/j.scitotenv.2022.158581
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发表时间：
2022-09-09
影响因子：
9.8
通讯作者：
Guo, Xuetao
中科院分区：
文献类型：
--
作者：
Chen, Hao;Chen, Yanhua;Guo, Xuetao
环境中的微塑料（MPs）污染已成为全球热点，但对大城市土壤中MPs的研究还不够。本研究调查了西安市城区不同功能区（商业区、旅游区、工业区、居住区）土壤中MPs的污染状况。西安市MPs平均丰度为2218项/kg，咸阳市为1329项/kg，杨凌市为1400项/kg。所有MP呈现出不同的形状，并且以碎片和纤维为主。 0-0.5毫米MP所占比例最大。聚对苯二甲酸乙二醇酯 (PET) 是 MP 的主要聚合物类型。结果显示，西安市区土壤受到议员污染，其中西安市议员污染较其他两个城市更为严重。这可能与先进的城市化和工业化进程有关。而且工业区和旅游区工业和人类活动频繁，其MP污染最严重。此外，远离污染源的居民区和部分商业区污染程度较低，议员分布也较为均匀。本研究可为西安市区土壤MPs污染调查提供数据和有价值的参考。
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.