Microplastics Origins and Risks: A Methodological Protocol for Source Identification, Apportionment, and Environmental Risk Assessment in Ahvaz Metropolis, Iran

Introduction: Airborne microplastics (MPs) pollution poses substantial risks to environmental and human health. This research protocol outlines a framework for investigating airborne MPs in Ahvaz, Iran, with objectives including their identification, characterization, and source attribution using chemical signature tracing and receptor modeling. Methods and Analysis: The study employs a dual approach of passive and active sampling supported by laboratory analysis and multivariate modeling. Sampling locations were selected to represent diverse urban settings, ensuring comprehensive spatial coverage and data reliability. The protocol included meticulous sample collection, volume estimation, and laboratory analysis to ensure the accurate identification and assessment of MPs pollution. Expected Outcomes: This protocol aims to reveal types, distribution, sources, and potential health risks of airborne MPs in Ahvaz. Insights provided strategies to mitigate MPs emissions in urban areas and a foundation for future research.