Abstract：
Microplastic (MP) pollution is evolving into one of the most pressing environmental concerns worldwide. This study assessed the impact of economic activities on atmospheric MP pollution across 17 megacities in northern China, analyzing the correlation between the deposition flux of atmospheric MPs and variables such as city population, gross domestic product (GDP), and industrial structure. The results have shown that the MP pollution is obviously impacted by human activities related to increased GDP, population, as well as tertiary service sector, in which the MP pollution shows most close relationship with the GDP growth. Polypropylene, polyamide, polyurethane, and polyethylene were identified as the primary components of atmospheric MPs. The average particle size of MPs in atmospheric dustfall is 78.3 µm, and the frequency of MP particles increases as the particle size decreases. The findings highlight the complex relationship between socio-economic development and atmospheric MP accumulation, providing essential insights for the formulation of targeted emission reduction strategies.
摘要：
微塑料（MP）污染正在发展成为全球最紧迫的环境问题之一。这项研究评估了经济活动对中国北方17个特大城市大气MP污染的影响，分析大气MPs沉积通量与城市人口等变量之间的相关性，国内生产总值(GDP)，和产业结构。结果表明，MP污染明显受到与GDP增长相关的人类活动的影响，人口,以及第三产业，其中MP污染与GDP增长关系最为密切。聚丙烯,聚酰胺,聚氨酯,和聚乙烯被确定为大气MPs的主要成分。大气降尘中MPs的平均粒径为78.3µm，并且MP颗粒的频率随着颗粒尺寸的减小而增加。研究结果强调了社会经济发展与大气MP积累之间的复杂关系，为制定有针对性的减排战略提供必要的见解。
