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A review on enriched microplastics in environment: From the perspective of their aging impact and associate risk
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This review explores what happens to microplastics as they age in the environment over long periods. Researchers found that natural weathering changes the physical and chemical properties of microplastics in ways that may increase their ability to harbor harmful microorganisms and interact with other pollutants, suggesting that aging may actually make microplastic pollution more hazardous over time rather than less.
Microplastics (MPs), as a kind of emerging pollutants, have arouse widespread concern with significant impact on ecosystems. Great attempts have been made to remove MPs from natural environments, yet they were still commonly detected with increasing concentration in various environmental media. The ultimate effectiveness of current remediation measures for MP pollution remained largely unexplored. Furthermore, with irreversibility and non-biodegradation, these MPs enriched in environments, exposed to various abiotic and biotic stress for a long-term. Natural aging processes change physicochemical properties and then environmental fate of MPs, inducing potential harm to ecosystems and human health. However, our understanding of aging behavior of MPs remains to be actually interpreted. This review summarized the latest progress in alleviating MP pollution and assessed their usability, especially for the controversial application of biodegradable plastics. The typical abiotic and biotic aging processes of MPs were also discussed. Giving that abiotic processes such as photo-aging are usually considered as prior to biodegradation, we reasonably assume MPs would undergo a prolonged aging process, but not a thorough degradation to a great extent due to their fairly slow degradation rate. This process might aggravate potential risk, especially aged MPs providing more ideal interfaces for the colonization of viral microbes deserves more attention in the future. This article conducts a systematical analysis and summary of long-term environmental behavior of MPs. Future research is encouraged to comprehensively strengthen the removal of MPs in ecosystems through source control and more targeted process treatment. • Current remediation strategies for microplastic (MP) pollution are discussed. • Biodegradable plastics might not be a silver bullet solution to MP pollution. • MPs undergo a prolonged retention, but not a thorough degradation in natural environments. • Aging processes of MPs are affected by abiotic and biotic environmental factors. • MP aging impacts play a vital role in potential risk to ecosystems.
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This review explains how microplastics age and break down in the environment through sunlight, heat, and chemical reactions, and why this aging process matters. As microplastics weather, their surfaces change in ways that make them better at absorbing toxic pollutants and more harmful to living organisms. Understanding these aging processes is important because the microplastics people encounter in food and water have typically been weathered, meaning they may be more dangerous than the fresh plastics used in most lab studies.
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This review examines how micro- and nanoplastics change as they age in the environment through exposure to sunlight, water, and biological activity. Aged plastics behave differently than fresh ones: they accumulate faster in ecosystems, are more easily taken up by organisms, and can release trapped chemicals as they break down. The findings suggest that the real-world health and environmental risks of microplastics may be greater than lab studies using new, unweathered plastics indicate.
Aging Process of Microplastics in the Environment
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This review examines how natural environmental processes — UV radiation, physical abrasion, chemical reactions, and biodegradation — alter the surface, shape, and chemistry of microplastics over time, and how these changes affect their ability to absorb and transport other pollutants. Understanding microplastic aging is critical because weathered particles behave differently than fresh plastic, often becoming more hazardous as pollutant carriers in ecosystems.
Interactions between microplastics and contaminants: A review focusing on the effect of aging process
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This review explains how aging and weathering change microplastics in ways that make them interact differently with environmental pollutants like heavy metals and pesticides. Aged microplastics tend to absorb more contaminants than fresh ones, and they can also release those pollutants under certain conditions. This is important for human health because the microplastics we encounter in food and water are typically weathered, meaning they may carry higher loads of toxic substances than laboratory studies suggest.
A comprehensive review of microplastic aging: Laboratory simulations, physicochemical properties, adsorption mechanisms, and environmental impacts
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This review examines how microplastics change as they age in the environment through exposure to sunlight, water, and chemicals, becoming rougher and more chemically reactive over time. Aged microplastics absorb more pollutants than fresh ones and release harmful additives and free radicals, meaning the microplastics people encounter in the real world may be more dangerous than the pristine particles typically used in lab studies.
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