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Combined effect of microplastics and copper complex on phytoplankton photosynthetic carbon sequestration: Intelligent sensing and multi-perspective analysis of copper bioavailability
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Combined effect of microplastics and copper complex on phytoplankton photosynthetic carbon sequestration: Intelligent sensing and multi-perspective analysis of copper bioavailability
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Researchers used intelligent copper speciation sensing to show that polystyrene microplastics antagonize copper-ligand complexes in phytoplankton, suppressing rather than enhancing carbon sequestration—revealing an unexpected antagonistic mechanism by which plastic-metal interactions could undermine the ocean's capacity to fix atmospheric CO2.
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Researchers examined how ocean acidification alters microplastic-copper dynamics and found that under moderate acidification PET microplastics adsorbed little additional copper while inorganic complexation dominated, but under severe acidification the increased proton competition reduced adsorption capacity and raised free ionic copper concentrations, potentially amplifying copper toxicity to marine organisms.
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