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A kinetic study on ...
A kinetic study on the Abiotic Methylation of Divalent Mercury in the Aqueous phase
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- Gårdfeldt, Katarina, 1959 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry
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Munthe, John (författare)
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- Strömberg, Dan, 1959 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för miljövetenskap och kulturvård,Department of Environmental Science and Conservation
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- Lindqvist, Oliver, 1943 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry
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(creator_code:org_t)
- 2003
- 2003
- Engelska.
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Ingår i: Science of the Total Environment. - 0048-9697 .- 1879-1026. ; 304:1-3, s. 127-136
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Abstract
Ämnesord
Stäng
- The mechanism and kinetics of the formation of methylmercury from an experimental solution containing divalent mercury and acetic acid has been investigated. The experiments were performed in a 2-dm3 Teflon reactor. The organic mercury was measured with time resolutions varying between minutes and hours, after derivatisation, gas chromatography separation and Cold vapour atomic fluorescence detection. (GC)-CVAFS. CVAFS technique was used for determination of inorganic mercury in the aqueous phase using an automated mercury analyser. The experiments were carried out in concentrations relevant for natural waters. Our result shows that the reaction proceeds via mercury acetate complexes. A first order reaction coefficient has been calculated at various pH values, and was found to be (9.0±0.9)×10−7 s−1 at pH 3.6–3.7. The rate was not found to be enhanced by UV-light when taking into account the photolytical degradation of methylmercury. The reaction rate at various pH values, the influences of some other relevant reaction parameters, and implications for atmospheric and terrestrial waters are discussed.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- Methylmercury
- Aerosol
- Aqueous-phase
- Cloud
- Aerosol
- Aqueous-phase
- Cloud; Methylmercury
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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