Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Dimethylmercury Formation… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Dimethylmercury Formation Mediated by Inorganic and Organic Reduced Sulfur Surfaces

Artikel i vetenskaplig tidskrift
Författare Sofi Jonsson
N. M. Mazrui
R. P. Mason
Publicerad i Scientific Reports
Volym 6
ISSN 2045-2322
Publiceringsår 2016
Publicerad vid Göteborgs miljövetenskapliga centrum, GMV
Språk en
Länkar dx.doi.org/10.1038/srep27958
Ämneskategorier Geokemi, Organisk kemi

Sammanfattning

Underlying formation pathways of dimethylmercury ((CH3)2Hg) in the ocean are unknown. Early work proposed reactions of inorganic Hg (Hg II) with methyl cobalamin or of dissolved monomethylmercury (CH3Hg) with hydrogen sulfide as possible bacterial mediated or abiotic pathways. A significant fraction (up to 90%) of CH3Hg in natural waters is however adsorbed to reduced sulfur groups on mineral or organic surfaces. We show that binding of CH3Hg to such reactive sites facilitates the formation of (CH3)2 Hg by degradation of the adsorbed CH3Hg. We demonstrate that the reaction can be mediated by different sulfide minerals, as well as by dithiols suggesting that e.g. reduced sulfur groups on mineral particles or on protein surfaces could mediate the reaction. The observed fraction of CH3Hg methylated on sulfide mineral surfaces exceeded previously observed methylation rates of CH3Hg to (CH3)2 Hg in seawaters and we suggest the pathway demonstrated here could account for much of the (CH3)2 Hg found in the ocean.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?

Denna text är utskriven från följande webbsida:
http://gu.se/forskning/publikation/?languageId=100000&disableRedirect=true&returnUrl=http%3A%2F%2Fgu.se%2Fenglish%2Fresearch%2Fpublication%2F%3FlanguageId%3D100001%26publicationId%3D243522&publicationId=243522
Utskriftsdatum: 2020-05-27