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Anforderungen des Gewässerschutzes an eine zukunftsfähige Abwasserbehandlung-Aktuelle Aspekte aus dem Forschungsprojekt NiddaMan
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Researchers assessed the toxicity of microplastic-sorbed persistent organic pollutants to fish cell lines, measuring cytotoxicity and oxidative stress induction for plastic extracts compared to dissolved contaminants. Contaminants sorbed to microplastic surfaces remained biologically active in cell assays, confirming that ingested plastic can deliver toxic chemical payloads to tissues.
Abwasser ist ein Vielstoffgemisch.Mit der Zunahme der Kenntnisse bezüglich der Zusammensetzung und Wirkweise von Abwasserinhaltsstoffen auf Mensch und Umwelt ging und geht die Installation und Erweiterung von Abwasserbehandlungsverfahren einher.Die Forschung hat in den vergangenen Jahren gezeigt, dass selbst geringe Stoffkonzentrationen Auswirkungen auf die aquatische Umwelt haben.So stehen aktuell die "neuen" Stoffgruppen Mikroschadstoffe, Mikroplastik, Nanopartikel und auch antibiotikaresistente Keime im Fokus.Gerade kleinere und mittlere Flussläufe in Deutschland sind vor allem in Zeit von Niedrigwasser geprägt von Einleitungen aus Kläranlagen.In Bezug auf die chemische Gewässerqualität und damit auch auf die aquatische Artenvielfalt ist noch immer weitgehend unbekannt, inwiefern diese Belastungsfaktoren zum unbefriedigenden Zustand der Gewässer beitragen, was im Rahmen des Verbundprojektes NiddaMan untersucht werden soll.
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Toxicity assessment of pollutants sorbed on microplastics using various bioassays on two fish cell lines
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Researchers collected microplastic samples from ocean expeditions and tested their toxicity using two fish cell lines, finding that cell lines differed in sensitivity and that microplastics with sorbed pollutants were toxic to cells. The results suggest that real-world microplastics carrying accumulated chemical pollutants pose a chemical toxicity risk to marine organisms beyond just the physical effects of ingesting plastic.
Microplastics may reduce the fish bioaccumulation of organic pollutants
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Researchers used machine learning to model how microplastics interact with organic pollutants in fish, finding a surprising 'cleaning' effect: although microplastics carry pollutants into fish, their strong binding capacity may also pull some pollutants back out, potentially reducing overall bioaccumulation — though this does not make microplastics safe.
Micro/Nanoplastic Toxicity on Aquatic Life: Fate, Effect and Remediation Strategy Treatment: A Review on Possible Solution Scenarios for Bioremediation in Real Wastewater Treatment
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Researchers review the fate and toxicological effects of micro- and nanoplastics on aquatic life, and evaluate bioremediation strategies — including microorganism- and plant-based approaches — as potential solutions for removing plastic particles in real-world wastewater treatment scenarios.
Effects of microplastics on the toxicity of co-existing pollutants to fish: A meta-analysis
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Meta-analysis of 1,380 biological endpoints from 55 studies found that microplastics in co-existing pollutant solutions significantly increased toxicity to fish beyond what the pollutants caused alone, particularly elevating immune system damage, metabolic disruption, and oxidative stress. The effect depended on fish life stage and microplastic size, but not on pollutant or polymer type.
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Researchers exposed microplastics in a highly polluted stream to assess their role as contaminant vectors, then tested effects on zebrafish, finding that naturally contaminated microplastics had limited additional toxicity compared to the polluted water itself.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.