WebMost MeHg production within the water column appeared to occur in the spring when much of the water column was in the processes of becoming anoxic. In the surface waters, rates of photodemethylation were relatively large (up to -0.25 d-1) but quickly decreased at depths >0.5 m below the surface. These results can be used to identify the ... WebJul 1, 2009 · Photodemethylation (PD) is thought to be the most important biogeochemical sink of methylmercury (MeHg) in freshwater lakes. However, we possess little …
Importance of Ultraviolet Radiation in the …
WebJan 1, 2024 · photodemethylation under Ar showed a higher kinetic rate and. Hg(0)/iHg(II) ratio than those with air saturation. Moreover, ROS test showed higher production of radical species under Ar. nick tompkins caps
Importance of ultraviolet radiation in the …
WebConsidering the significance of photodemethylation suggested from our results, further studies that examine the association between the photodemethylation rate and shortwave radiation with different wavelengths and the roles of various seawater compositions, especially chlorophyll and dissolved organic matter (or DOC) are needed to better ... WebJun 15, 2014 · Monomethyl mercury (MeHg) is a potent neurotoxin that threatens ecosystem viability and human health. In aquatic systems, the photolytic degradation of MeHg (photodemethylation) is an important component of the MeHg cycle. Dissolved organic matter (DOM) is also affected by exposure to solar radiation (light exposure) … WebJan 1, 2024 · Photodemethylation can be one of the primary processes for loss of neurotoxic methylmercury (MeHg) in freshwater lakes. Few studies have quantified … nick today presenter