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Global insights into microplastic contamination in marine life: detection methods and current status
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This review provides a global overview of microplastic contamination in marine organisms, covering how these particles are ingested, accumulate through food chains, and affect marine life. Researchers summarize detection methods including spectroscopic and thermal analysis techniques, evaluating their strengths and limitations. The study emphasizes that while significant progress has been made, major challenges remain in detecting nanoplastics, standardizing methods, and understanding long-term health effects for both marine life and seafood consumers.
Microplastics (MPs) pollution has become a pressing environmental issue, significantly impacting marine ecosystems and food safety. These synthetic particles, defined as plastic fragments smaller than 5 mm, originate from various sources and have infiltrated marine habitats worldwide, from surface waters to deep-sea sediments. This review provides a comprehensive analysis of MPs contamination in marine organisms, highlighting global case studies and detection methodologies. MPs are ingested by marine life through direct uptake or trophic transfer, causing adverse biological effects, including growth inhibition, reproductive impairments, and bioaccumulation of toxic substances. Humans are exposed to MPs primarily through seafood consumption, raising concerns about potential health risks. We examine various detection techniques, including visual identification, spectroscopic methods (FTIR, Raman spectroscopy), and thermal analytical approaches (Py-GC/MS, TGA), evaluating their advantages and limitations. Despite significant research progress, challenges remain, particularly in detecting nanoplastics, standardizing methodologies, and understanding the long-term ecological and human health implications. Case studies from different regions demonstrate varying contamination levels, influenced by local environmental conditions, industrial activities, and waste management practices. This review emphasizes the need for improved monitoring, regulatory frameworks, and mitigation strategies to address the pervasive threat of MPs pollution. Future research should focus on refining detection technologies, assessing human health impacts, and implementing policy measures to reduce plastic emissions into marine environments.
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