Environmental Drivers of Monomethylmercury Photodegradation along the Land-to-Ocean Aquatic Continuum DOI Creative Commons

Sonja Gindorf,

Johannes West, Andrew M. Graham

et al.

Environmental Science Processes & Impacts, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

In surface waters, photodegradation is a major abiotic removal pathway of the neurotoxin monomethylmercury (MMHg), acting as key control on amounts MMHg available for biological uptake. Different environmental factors can alter rate photodegradation. However, our understanding how pathways in complex matrixes along land-to-ocean aquatic continuum respond to changes salinity, dissolved organic carbon (DOC) concentration and matter (DOM) composition incomplete. set laboratory experiments combining several artificial natural we demonstrate that interplay DOC concentration, DOM composition, salinity affects MMHg. The presence was found facilitate photodegradation, but degradation rates were not altered by varying concentrations over two orders magnitude. We have stronger effect than concentration. at high levels, where most UV radiation lost within first cm reaction vessels, lower observed. When moving from terrestrially influenced characterized degree humification, towards marine conditions with protein-rich pool, increased. contrast, had stabilizing Hence, especially systems low salt concentrations, either or impact

Language: Английский

Environmental Drivers of Monomethylmercury Photodegradation along the Land-to-Ocean Aquatic Continuum DOI Creative Commons

Sonja Gindorf,

Johannes West, Andrew M. Graham

et al.

Environmental Science Processes & Impacts, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

In surface waters, photodegradation is a major abiotic removal pathway of the neurotoxin monomethylmercury (MMHg), acting as key control on amounts MMHg available for biological uptake. Different environmental factors can alter rate photodegradation. However, our understanding how pathways in complex matrixes along land-to-ocean aquatic continuum respond to changes salinity, dissolved organic carbon (DOC) concentration and matter (DOM) composition incomplete. set laboratory experiments combining several artificial natural we demonstrate that interplay DOC concentration, DOM composition, salinity affects MMHg. The presence was found facilitate photodegradation, but degradation rates were not altered by varying concentrations over two orders magnitude. We have stronger effect than concentration. at high levels, where most UV radiation lost within first cm reaction vessels, lower observed. When moving from terrestrially influenced characterized degree humification, towards marine conditions with protein-rich pool, increased. contrast, had stabilizing Hence, especially systems low salt concentrations, either or impact

Language: Английский

Citations

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