Vanadium Detoxification: On the Interaction of Oxovanadium(IV) and Other Vanadium Species with 2,3-Dimercapto-1-propanesulfonate

WILLIAMS PAM; BARAN, E. J.

Journal of Inorganic Biochemistry

Elsevier

Año: 2008 vol. 102 p. 1195 - 1198

0162-0134

The interaction of the VO(2+) cation with the sodium salt of 2,3-dimercaptopropanesulfonic acid (DMPS) was investigated by electronic absorption spectroscoopy in aqueous solution, in the pH range between 4 and 12. The spectral behavior points to the generation of a [VO(DMPS)2](4-) complex in which the oxocation interacts with two pairs of deprotonated -SH groups of the ligand. By spectrophotometric monitoring it was found that DMPS rapidly reduces vanadates(V) to VO(2+) which may be chelated by an excess of the acid. DMPS produces also the slow reduction of a V2O5 suspension at pH 7.1. The results of this study suggest that DMPS may be a potentially useful detoxification agent for vanadium.