A kinetic study of the gas-phase reaction between the hydroxylradical and atomic mercury
Artikel i vetenskaplig tidskrift, 2001

The atom is the dominating species of mercury in the atmosphere. Its oxidation processes are of great interest since it is mainly oxidised mercury that undergoes deposition and thereby spreads into the ecosystems and becomes bioaccumulated. The kinetics of the gas-phase reaction between atomic mercury and hydroxyl radical has been determined at room temperature and atmospheric pressure of air by relative rate technique. OH radicals were produced by photolysis employing methyl nitrite. By using cyclohexane as the reference compound, the rate coefficient obtained was k(Hg0+·OH)=(8.7±2.8)×10−14 cm3 s−1 leading to natural lifetimes of mercury at global mean conditions of 4–7 month due to this reaction.

Rate coefficient

Atmosphere

Tropospheric life-time

Oxidation

Mercury

Författare

J. Sommar

Katarina Gårdfeldt

Göteborgs universitet

Xinbin Feng

Dan Strömberg

Göteborgs universitet

Atmospheric Environment

1352-2310 (ISSN)

Vol. 35 17 3049-3054

Ämneskategorier

Fysikalisk kemi

Meteorologi och atmosfärforskning

Miljövetenskap

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Skapat

2017-10-10