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Microplastic pollution in marine environments: An in-depth analysis of advanced monitoring techniques, removal technologies, and future challenges
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This review provides a comprehensive analysis of microplastic pollution in marine environments, covering sources, ecological impacts, and current monitoring and removal technologies. Researchers examined physical, chemical, and biological methods for microplastic detection and cleanup, including filtration, separation, and hybrid approaches. The study concludes that while progress has been made, significant gaps remain in our ability to effectively monitor and remove microplastics from ocean ecosystems.
Microplastics, recognized as toxic contaminants, have pervaded terrestrial, atmospheric, and marine environments, transitioning from emerging pollutants to pervasive threats. About 10 % of the plastic produced worldwide enters into the ocean which constitutes 85 % of marine litter. Microplastic distribution holds the highest concentration in the Atlantic Ocean whereas the Southern Ocean holds the lowest. Concerning microplastics, reports state that each year about 1.3 million metric tons of microplastics enter the ocean. The microparticles account for about 90 % of the floating ocean debris and over 75 % of these particles originate from land-based sources which include urban runoff, and mismanaged wastes. This review offers a thorough examination of the sources of microplastics and their environmental consequences and ecological impacts. The ubiquity of microplastics necessitates robust control measures, starting with their monitoring and detection in aquatic ecosystems to assess the effectiveness of mitigation strategies. Current removal methods, including physical, chemical, and bio-based techniques, are detailed, alongside advances in filtration, separation, and integrated hybrid approaches for microplastic control. The review concludes with perspectives on the limitations of existing methods and directions for future research in microplastic monitoring, detection, and removal.
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