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Plastics in the environment and trends for the future
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This review explains how plastics — especially polypropylene — accumulate in oceans and fragment into microplastics through UV exposure and weathering, threatening marine biodiversity. It advocates replacing conventional plastics with biodegradable bioplastics and enacting supportive legislation as practical steps to reduce the environmental microplastic burden.
The studies carried out are about the first molecules, classification, properties and environmental problems caused by the rampant disposal of plastics. In this context, with the increase in the unbridled consumption of plastic, which has been contributing to major contamination in all environments, mostly culminating in the oceans. It should be noted that polypropylene is one of the most used polymers in the manufacture of flexible plastic packaging and the accumulation of these materials in the environment, especially in the oceans, has been causing several negative impacts on the planet's biodiversity. An alternative to the problems caused by the improper disposal of this waste would be the replacement of traditional plastics with biodegradable and compostable polymers from renewable sources whose life cycle tends to be less polluting, since, under favorable conditions, they degrade in biologically active environments, not producing toxic waste for the environment. Therefore, it becomes necessary to implement legislations that favor the use of bioplastics over conventional plastics and the changes in consumer behavior that drive the market for biopolymers. The problems of plastics in the environment and in human health are presented as a function of the understanding of the concerns, in addition to a look at priorities, challenges, opportunities that bring benefits with the application of plastics in the future. However, about the use and disposal that have been increasing, and the need to recycle and reverse this trend, so that they can be considered end-of-life materials, as valuable raw materials for new production, instead of waste.
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Degradation of polypropylene : proportion of microplastics formed and assessment of their density.
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Researchers quantified the proportion of microplastics generated during UV-driven degradation of polypropylene and assessed changes in chemical composition caused by photooxidation. The study found that UV exposure progressively fragments polypropylene and alters its surface chemistry, affecting subsequent environmental behavior and toxicity.
Potential environmental impacts of bioplastic degradation in natural marine environments: A comprehensive review
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This review examines the environmental impacts of biodegradable plastics degrading in marine environments, finding that their microscale breakdown raises significant concerns about contributing to microplastic pollution rather than eliminating it. The authors conclude that biodegradable plastics require reevaluation as petroleum-based plastic substitutes given the incomplete understanding of their behavior at the microscale in marine ecosystems.
Marine Pollution from Plastics and Microplastics
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This review examines how marine plastic pollution proliferates in ocean environments, discussing the degradation pathways by which macroplastics break down into microplastics and the resulting harmful effects on marine organisms and ecosystems. The review synthesizes evidence on physical, chemical, and biological impacts of plastics across marine habitats.
Exploring the hidden environmental pollution of microplastics derived from bioplastics: A review
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This review examines the often-overlooked problem that even bioplastics, marketed as eco-friendly alternatives, can break down into micro- and nanoplastics in the environment. Research since 2012 has identified multiple degradation pathways, including UV exposure, mechanical wear, and biodegradation, that fragment bioplastics into tiny particles. The toxicity of these bioplastic-derived microparticles is still poorly understood, highlighting a hidden source of plastic pollution.
Marine Pollution: The Problematic of Microplastics
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This review paper examines the problem of microplastic marine pollution, covering the origin of plastic debris, its fragmentation into microplastics, distribution across ocean environments, and known biological effects. The work provides a comprehensive overview of why microplastics represent a serious and growing threat to marine ecosystems.
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