oa Fate of Microplastics in River Environment: Chemical Composition of Molecular Releasing after Photolysis and Hydrolysis

This study investigates the role of photodegradation and hydrolysis in microplastic breakdown, particularly their contributions to greenhouse gas emissions and molecular byproduct release. Five widely used polymers (PP, LDPE, HDPE, PET, PS) were exposed to simulated solar radiation for eight weeks in dry and aquatic conditions. Gas emissions (CO2, CO, CH4, H2) were quantified using GC/TCD, while structural changes and organic compound release were analyzed using FTIR and GC/MS.

Results indicate that all polymers emit greenhouse gases upon irradiation, with greater emissions in aquatic conditions. Structural modifications, including carbonyl and hydroxyl formation, were observed, alongside organic matter release into water. These findings highlight plastics as a potential source of atmospheric and aquatic pollutants, emphasizing the need for further environmental assessment.