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Comparison of two measurement methods of dissolved gaseous mercury concentrations and estimations of supersaturation grade and mercury fluxes during a research campaign at the Mediterranean Sea

Michelle Nerentorp (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Katarina Gårdfeldt (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; I. Wangberg
Proceedings of the 16th International Conference on Heavy Metals in the Environment (2267-1242). Vol. 1 (2013),
[Konferensbidrag, refereegranskat]

Dissolved gaseous mercury (DGM) concentrations and gaseous elemental mercury (GEM) concentrations were measured during an oceanographic campaign in the Mediterranean Sea. The DGM concentrations were measured using two different methods, a manual-and an automated method. The manual method was used to obtain DGM depth profiles at several stations throughout the campaign. The automated device measured DGM concentrations continuously at a depth of 4 m. Gaseous elemental mercury (GEM) concentrations in air were measured continuously at the bridge deck. The objectives were to achieve DGM depth profiles, compare the manual-and automated DGM measurement methods, to calculate the supersaturation grades of the sea and the evasional fluxes from the sea surface. Depth profiles of the four measured stations show no diurnal variations. The manual-and the automated method show good compliance. Supersaturation grades are high due to high DGM values and low GEM concentrations. Fluxes of Hg from the sea surface are more dependent on the wind speed than on the supersaturation grade according to the flux models used.

Nyckelord: Mercury, DGM, GEM, Supersaturation grades, Mercury fluxes, Mediterranean, Sea, gas-exchange

Denna post skapades 2013-12-17. Senast ändrad 2015-02-11.
CPL Pubid: 189571


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)



Chalmers infrastruktur