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Determination of nano and microplastic particles in hypersaline lakes by multiple methods
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Researchers used multiple analytical methods to detect and characterize nano- and microplastic particles in a large hypersaline lake, finding both types present across different seasons and locations. The unique chemistry of hypersaline environments affects how plastic particles behave and accumulate. This is one of the first studies to examine microplastic contamination in hypersaline lake systems, which are ecologically distinct and understudied.
Microplastics and nanoplastics have a range of impacts on the aquatic environment and present major challenges to their mitigation and management. Their transport and fate depend on their composition, form, and the characteristics of the receiving environment. We explore the spatial and temporal dynamics of plastic particles in the world's second-largest hypersaline lake, combining information from microscopic, thermal gravimetric, and fractional methods. Studies on microplastic and nanoplastic pollution in these important environments are scarce, and there is limited understanding of their dynamics and fate. Our results for Urmia Lake (Iran) in 2016 and 2019 show a discrepancy in the composition and quantity of microplastics measured in river tributaries to the lake and the lake itself, suggesting an active microplastic sink. Potential sink mechanisms in hypersaline lakes are explored. The present study indicates that microplastics have different transport mechanisms and fate in these extreme environments, compared to lake and ocean environments.
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Researchers characterized microplastics across multiple abiotic compartments — surface sediment, lake salt, sludge, lake water, and wastewater — of the hypersaline Maharloo Lake in Iran for the first time, finding 742 microplastics dominated by clear, fibrous particles in the 50–250 µm size range.
Sources, concentrations, distributions, fluxes and fate of microplastics in a hypersaline lake: Maharloo, south-west Iran
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Researchers investigated microplastic sources, concentrations, distributions, and fate in the hypersaline Maharloo Lake in southwest Iran and its inflowing anthropogenically impacted rivers, finding river microplastic concentrations ranging from 0.05 MP/L in headwaters to approximately 2 MP/L downstream of industrial effluents. The study provides one of the first assessments of microplastic dynamics in a hypersaline lake ecosystem.
Floating microplastics in a hypersaline Mediterranean coastal lagoon: Abundance, chemical composition, and influence of environmental parameters
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Researchers conducted the first microplastic investigation of a Mediterranean hypersaline coastal lagoon, finding an average abundance of 60 MPs/L with a statistically significant positive correlation to salinity. Particles were dominated by cellulose acetate semi-synthetic fibers and a small fraction of PET, with fishing and tourism activities identified as likely sources.
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A year-round study of microplastic distribution in a hypersaline coastal lagoon found that seasonal wind patterns and tidal exchange governed particle transport more than human activity, with sediment acting as the primary microplastic sink.
Warning signal from the Dead Sea: Plastic pollution at the deepest hypersaline lake
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Researchers used the Dead Sea's unique conditions — hypersaline water that traps floating plastics along retreating shorelines — to reconstruct a two-decade history of plastic accumulation and weathering, providing a rare temporal archive of plastic pollution dynamics in an extreme environment.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.