Naslov
Adsorption of Lead(II) on Mercury Electrodes from Chloride-Bromide Mixtures of High Ionic Strength

Autori
Zelić, Marina ; Branica, Marko

Izvornik
Electroanalysis (1040-0397) 4 (1992), 6; 623-628

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

Ključne riječi
lead ; speciation ; adsorption

Sažetak
The adsorption of lead(II) from chloride-bromide mixtures of a high ionic strength (1-4 mol/L) to mercury electrodes was studied using square wave voltammetry, differential, and normal pulse polarography. The presence of excess chloride ions in the solution prevents additional surface complexation of PbBr2 with previously adsorbed free bromide ions and the formation of PbBr3- at the mercury drop. Adsorption effects are highly pronounced even when PbBr2 makes less than 1% of dissolved metal, indicating that a mixed-ligand species could be attached to the electrode. It is possible to explain nearly all experimental resultsby the surface activity of both PbBr2 a mixed-ligand complex PbBr2Clx(x-).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA