Institute of Quality Standard and Testing Technology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
Key Laboratory of Ecosystem Network Observation and `, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Sci Total Environ. 2023 Jul 20;883:163567. doi: 10.1016/j.scitotenv.2023.163567. Epub 2023 Apr 22.
As the research on microplastics (MPs) has intensified, more attention has been paid to MPs deposition in the atmosphere. This study further explores and compares the characteristics, the possible sources and influencing factors of deposition of MPs in three different ecosystems: forest, agricultural and residential area in Beijing. It was found that the deposited plastics were mostly white or black fibres, with PET and RY as the main MPs types. The range of deposition fluxes was 67.06-461.02 item·m·d, with highest deposition in residential area and lowest in forest, significant differences in MPs characteristics between environments. Based on MPs composition and shape, combined with backward trajectory analysis, the main sources of MPs were found to be textiles. Deposition of MPs was found to be influenced by environmental and meteorological factors. Factors such as gross domestic product and population density had a significant impact on the deposition flux, while wind played a diluting role for atmospheric MPs. The study investigated the characteristics of MPs in different ecosystems which may help to understand the transport patterns of MPs and is of great importance for the management of MPs pollution.
随着对微塑料（MPs）的研究不断深入，人们越来越关注 MPs 在大气中的沉积。本研究进一步探索和比较了北京三个不同生态系统（森林、农业和居民区）中 MPs 沉积的特征、可能来源和影响因素。结果发现，沉积的塑料主要是白色或黑色纤维，以 PET 和 RY 为主要 MPs 类型。沉积通量范围为 67.06-461.02 项·m·d，其中居民区沉积最高，森林最低，环境之间 MPs 特征存在显著差异。根据 MPs 的组成和形状，结合后向轨迹分析，发现 MPs 的主要来源是纺织品。 MPs 的沉积受环境和气象因素的影响。国内生产总值和人口密度等因素对沉积通量有显著影响，而风对大气 MPs 则起稀释作用。本研究调查了不同生态系统中 MPs 的特征，这有助于了解 MPs 的传输模式，对 MPs 污染的管理具有重要意义。
