Naslov
Specification of mercury in two dimictic lakes of north-east Germany during a period of 600 days
(Specification of mercury in two dimictic lakes of north-east Germany during a period of 600 days)

Autori
Meyer, Stefan ; Kubsch, Georg ; Lovrić, Milivoj ; Scholz, Fritz

Izvornik
International journal of environmental analytical chemistry (0306-7319) 68 (1997), 3; 347-368

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
mercury ; mercury speciation ; freshwater ; differential pulse anodic stripping voltammetry

Sažetak
The speciation of mercury was studied with to (a) dissolved atomic mercury, (b) dissolved ionic mercury, and (c) total mercury in two dimictic lakes of North_East Germany. Differential pulse anodic stripping voltammetry was used for the analyses. The results show that biological processes dominate the speciation. They are responsible for high concentration of atomic mercury and also organomercury compounds. The oxidation of atomic mercury under environmental conditions in lake water is very slow, so that the equlibrium between Hg0 and Hg2+ can only established during long periods of decreased bioactivity, as in wintertime. The sedimentation of the detritus during summer leads to a very pronounced decrease of the overall mercury concentration in the entaire water body of the lakes.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA