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
Paper in proceedings, 2013

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.

GEM

Mediterranean

gas-exchange

DGM

Sea

Mercury fluxes

Mercury

Supersaturation grades

Author

Michelle Nerentorp

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Katarina Gårdfeldt

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

I. Wangberg

IVL Svenska Miljöinstitutet AB

E3S Web of Conferences

22671242 (eISSN)

Vol. 1 32007

Subject Categories

Environmental Sciences

DOI

10.1051/e3sconf/20130132007

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Latest update

3/7/2018 1