Naslov
Influence of sulphur cycle on mercury methylation in estuarine sediment (Seine estuary, France)

Autori
Niessen, Sylvie ; Foucher, Delphine ; Clarisse, O ; Fischer, Jean-Claude ; Mikac, Nevenka ; Kwokal, Željko ; Fajon, V ; Horvat, Milena ;

Izvornik
Journal de Physique. IV (1155-4339) 107 (2003); 953-956

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, kongresno priopcenje, znanstveni

Ključne riječi
mercury; speciation

Sažetak
In order to investigate interaction between mercury speciation and reduced sulfur, speciation of mercury and sulfur were determined in sediment cores sampled in saline and freshwater wetlands of the Seine estuary, France. Solid phase was analyzed for total (HgT) and monomethyl mercury (MMHg), total sulfur, acid volatile sulfides (AVS), chromium reducible sulfur (CRS) and organic carbon. In porewater, in addition to total and methyl mercury, iron, manganese and sulfates were also determined. Levels of the HgT (0.5-2.0 mg/kg d.w.) in sediment of the Seine estuary were relatively high and typical for sediments in industrial area. The sediment contained 0.5-1.5 μ g/kg d.w. of MMHg, which made an average 0.1% of the HgT in sediment. Concentration of MMHg was found to be dependant more on the chemical conditions in sediment than on the level of HgT. Depth profiles of MMHg in the solid phase and HgT in porewater at two sites studied could be related to the production of AVS in sediment as well as to the redox conditions of porewater (defined by Eh and dissolved iron and manganese).

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija

Napomena
Journal de Physique IV (Proceedings) ; XIIth International Conference on Heavy Metals in the Environment ; Grenoble, France, May 26-30, 2003 ; C. Boutron, C. Ferrari (Eds.) ; ISBN 2-86883-683-6(sv.1) ; 2-86883-684-4 (sv.2)

POVEZANOST RADA