Comprehensive Analysis of Atmospheric Microplastic Deposition: Insights from North Wales, UK, and Global Collaborations.

Microplastic contamination poses a significant environmental threat with far-reaching consequences for ecosystems and human well-being. This study addresses this concern by conducting an extensive analysis of atmospheric microplastic (MP) deposition, with a focus on fostering international collaboration across countries. While significant research has focused on microplastics in aquatic environments, their presence in the atmosphere remains relatively unexplored. This research seeks to fill this gap by evaluating atmospheric MPs, providing crucial insights into their distribution and transport mechanisms. The main objective of this study is twofold: first, to assess the characteristics and prevalence of atmospheric MPs in North Wales, UK; and second, to establish collaborative partnerships with countries such as China, Vietnam, Egypt, Sri Lanka and Brazil. Simultaneously, the research identifies MPs in the soil, facilitating a comprehensive comparison between these two environments. This comparative analysis not only contributes to our understanding of potential atmospheric MP deposition onto the soil but also emphasises the importance of collaborative efforts in addressing this global issue. The sampling approach involves collecting both rainfall and soil samples over a year. Fluorescence microscopy is employed to assess the quantity, shape, and size of MPs, while Laser Direct Infrared Imaging (LDIR) is utilised to identify their polymer composition. Preliminary findings reveal a significant prevalence of small MPs (20-40 microns), with abundance diminishing as MP size increases. Temporal variations in MPs align primarily with rainfall patterns, with wind emerging as a crucial factor during periods of low-intensity precipitation. Additionally, the presence of MPs in the soil is expected to be influenced by vegetation coverage, with deposition anticipated to rise with increased precipitation. This comprehensive examination not only enhances our understanding of the environmental fate of MPs but also underscores the need for collaborative approaches to address atmospheric MP pollution globally. By establishing partnerships, the research aims to create a framework for shared knowledge and resources, enabling the comparison of atmospheric MP deposition across different climate zones. This international collaboration not only expands the study's scope but also fosters a collective understanding of the impact of atmospheric MPs on diverse environments.