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Microplastics–Pollutant Interactions in Environmental Systems: Mechanisms, Ecological Effects, and Implications for Sustainable Management
Original title: Microplastics–Pollutant Interactions in Environmental Systems: Mechanisms, Ecological Effects, and Implications for Sustainable Management
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Tiny plastic bits called microplastics don't just pollute on their own—they can act like sponges, soaking up other harmful chemicals from water, soil, and air, then carrying and releasing them in ways that make those toxins more likely to build up in animals and move up the food chain. This review pulls together existing research to explain how that process works and why it matters, since these plastic-chemical combos may increase human exposure to pollutants through our food and environment. The authors also point to practical fixes—like better wastewater treatment and monitoring—that could help reduce this compounded risk.
Microplastics (MPs) are persistent contaminants widely distributed across aquatic, terrestrial, and atmospheric environments. Previous reviews have shown that MPs can carry pollutants and change their environmental behavior, but the field is now broad enough that a simple repetition of sources, adsorption mechanisms, and toxicity would add limited value. This review therefore organizes MPs-pollutant-interactions as a connected chain from sources and environmental pathways to interaction mechanisms, biological effects, and management actions. It summarizes the major MPs input pathways and representative polymer types across water, soil, and air, and then explains how partitioning, surface adsorption, desorption, and pore filling control the binding and release of pollutants. The review further discusses how MPs properties, pollutant characteristics, pollutant mixtures, biofilms/plastisphere, and environmental factors jointly regulate these processes. In addition, it evaluates the consequences of MPs-pollutant coupling for pollutant mobility, bioavailability, biodegradation, bioaccumulation, trophic transfer, ecological toxicity, and human exposure. Finally, the review links these processes with practical management needs, including wastewater treatment, sludge reuse, agricultural plastic control, atmospheric monitoring, environmental education, and long-term risk assessment. By bringing these topics into one framework, this review provides a clearer basis for understanding and managing MPs-associated mixed pollution in environmental systems.
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