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Microplastic-derived dissolved organic matter: Generation, characterization, and environmental behaviors
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This review examines how microplastics release dissolved organic matter as they break down in the environment, creating a previously overlooked source of carbon and chemical pollution. Researchers found that this microplastic-derived organic matter can interact with other pollutants, affect water quality, and influence microbial communities. The study highlights a lesser-known dimension of microplastic pollution that could have significant environmental consequences.
Microplastics (MPs) represent a substantial and emerging class of pollutants distributed widely in various environments, sparking growing concerns about their environmental impact. In environmental systems, dissolved organic matter (DOM) is crucial in shaping the physical, chemical, and biological processes of pollutants while significantly contributing to the global carbon budget. Recent findings have revealed that microplastic-derived dissolved organic matter (MP-DOM) constitutes approximately 10 % of the DOM present on the ocean surface, drawing considerable attention. Hence, this study's primary objective is to explore, the generation, characterization, and environmental behaviors of MP-DOM. The formation and characteristics of MP-DOM are profoundly influenced by leaching conditions and types of MPs. This review delves into the mechanisms of the generation of MP-DOM and provides an overview of a wide array of analytical techniques, including ultraviolet-visible (UV-Vis) spectroscopy, fluorescence spectroscopy, Fourier transform infrared spectroscopy (FTIR), and mass spectroscopy, used to assess the MP-DOM characteristics. Furthermore, this review investigates the environmental behaviors of MP-DOM, including its impacts on organisms, photochemical processes, the formation of disinfection by-products (DBPs), adsorption behavior, and its interaction with natural DOM. Finally, the review outlines research challenges, perspectives for future MP-DOM research, and the associated environmental implications.
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Microplastic-derived dissolved organic matter and its biogeochemical behaviors in aquatic environments: A review
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This review examines how microplastics release dissolved organic matter (MP-DOM) as they break down in water, and how these released chemicals affect water ecosystems. MP-DOM can interact with other pollutants and alter carbon cycling in natural waters, with the type and amount varying based on plastic composition and weathering conditions. Understanding what microplastics release into water as they degrade is important because these dissolved chemicals may have their own toxic effects on aquatic life and water quality.
Microplastic-Derived Dissolved Organic Matter: Environmental Chemistry and Ecological Consequences
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As plastics break down in the environment, they don't just create tiny particles, they also leach invisible dissolved chemicals into water, and this review pulls together what scientists currently know about them. These dissolved substances can interact with pollutants, metals, and even contribute to harmful byproducts when water is treated for drinking, meaning microplastic pollution may affect water quality in ways beyond the visible plastic bits we usually hear about. The researchers note that scientists still need standardized testing methods to better predict the real-world risks these invisible plastic byproducts pose to ecosystems and, ultimately, human health.
Environmental behavior and mechanistic interactions of biochar-derived dissolved organic matter with microplastics
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This review examines how dissolved organic matter released from aging biochar interacts with microplastics in soil and water environments. Researchers found that biochar-derived organic matter can alter the surface properties, mobility, and toxicity of microplastic particles through mechanisms like adsorption and coating. The study highlights these interactions as an important but underappreciated factor in understanding the environmental fate of microplastics.
Microplastic-Derived Dissolved Organic Matter: Release Pattern, Chemical Properties, Environmental Risk, and Impact on Carbon Cycling
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This review examines microplastic-derived dissolved organic matter (MPs-DOM), which plastic debris releases at an estimated 23,600 tons annually into surface waters, covering its chemical properties, release patterns, and interactions with metals, microorganisms, and the carbon cycle. MPs-DOM represents a largely overlooked secondary pollution pathway through which microplastics extend their environmental impact well beyond the particles themselves.
Characterization of microplastic-derived dissolved organic matter in freshwater: Effects of light irradiation and polymer types
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Researchers examined how different types of microplastics release dissolved organic matter into freshwater under light and dark conditions. They found that polypropylene released the most organic compounds after UV exposure, while protein-like substances were the main material released by most plastics in the dark. The study indicates that microplastics may have ongoing, long-term effects on water chemistry and microbial activity in natural water bodies.
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