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Microplastics in Aquatic Ecosystems: A Global Review of Distribution, Ecotoxicological Impacts, and Human Health Risks
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This global review summarizes how microplastics are distributed across freshwater, marine, and polar environments, and examines their ecological and human health impacts. People are exposed through contaminated seafood, water, and air, and research links microplastic exposure to oxidative stress, inflammation, hormone disruption, and possible genetic effects at the cellular level.
Microplastics (MPs), defined as synthetic polymer particles less than 5 mm in diameter, are widely acknowledged as ubiquitous contaminants in aquatic ecosystems, including freshwater, marine, and polar environments. Global concern with MPs has significantly increased; nevertheless, much of the current knowledge remains fragmented and, at times, limited to specific regions or ecological compartments. This study emphasizes the necessity of a thorough synthesis by critically analyzing global microplastics’ dispersion patterns, ecological consequences, and associated human health concerns. A systematic approach was employed, integrating specific search terms and establishing inclusion and exclusion criteria across various scientific databases to obtain a representative collection of literature. The study covers important topics such as the classification of MPs, their distribution, environmental impacts, and interactions with other pollutants, including heavy metals, pharmaceuticals and endocrine-disrupting chemicals. Particular emphasis is placed on comparing ecosystem-specific vulnerabilities, such as those found in tropical wetlands, marine gyres, and polar systems. The review examines potential human exposure pathways, via contaminated seafood, water, and air, while also compiling new information about cellular and physiological damage, including oxidative stress, inflammation, hormone disruption, and possible genetic effects. This investigation highlights the value of collaborative monitoring, the adoption of biodegradable alternatives, policy development, and interdisciplinary research by integrating knowledge from ecology and public health. The primary objective is to advance ecosystem-specific mitigation techniques and promote evidence-based policy development in addressing this intricate environmental issue.
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Microplastics in aquatic environments: A review on occurrence, distribution, toxic effects, and implications for human health
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This review examines the global occurrence of microplastics in aquatic environments and their potential impacts on both aquatic organisms and human health. Researchers found that microplastics are now present in virtually all freshwater and marine systems, where they cause a range of harmful effects including oxidative stress, inflammation, and reproductive disruption in aquatic species. The study highlights trophic transfer, where microplastics move up the food chain, as a key pathway of human exposure.
Microplastic Pollutants in Aquatic Ecosystems: Present and Future Challenges
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This review synthesizes evidence on microplastics as a widespread and growing contaminant found across marine, freshwater, terrestrial, and atmospheric environments. Organisms at every level of the food chain ingest microplastics, which cause physical harm, oxidative stress, and reproductive disruption, while also acting as carriers for toxic chemicals and pathogens. For humans, exposure via contaminated food, water, and air is well-documented — microplastics have been found in blood and tissues — though direct causal health links are still being established, making further research a priority.
A review on occurrence and environmental risk assessment for microplastics in freshwater systems
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This review covers the occurrence, distribution, and health risks of microplastics across aquatic environments, food sources, and the atmosphere. It evaluates evidence for human exposure through multiple pathways and identifies gaps in understanding the full health impacts of chronic microplastic ingestion.
Microplastic in the Aquatic Environment and their Impact on Aquatic Organisms and Humans: A Review
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This review summarizes research on microplastic occurrence across marine water, freshwater, drinking water, wastewater, food, and air, characterizing microplastics as the most hazardous emerging contaminants of the 21st century given their ubiquity and persistence. The review underscores that human exposure through multiple simultaneous pathways — including food, water, and respiration — makes understanding cumulative health risks a critical research and public health priority.
Potential Health Impact of Microplastics: A Review of Environmental Distribution, Human Exposure, and Toxic Effects
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This review summarizes existing research on how microplastics are found throughout the environment and in human samples, entering the body through food, air, and skin contact. Lab studies in cells and animals show microplastics can cause oxidative stress, DNA damage, immune reactions, brain toxicity, and reproductive harm, and early human health data links microplastic exposure to several chronic diseases.
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