Vanadium detoxification: on the interaction of oxovanadium(IV) and other vanadium species with 2,3-dimercapto-1-propanesulfonate.
The interaction of the VO2+ cation with the sodium salt of 2,3-dimercapto-1-propanesulfonic acid (DMPS) was investigated by electron absorption spectroscopy 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 VO2+ 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.
Williams
Patricia A M
PA
Centro de Química Inorgánica CEQUINOR/CONICET, UNLP, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C Correo 962, 1900 La Plata, Argentina.
Baran
Enrique J
EJ
D002614:Chelating Agents / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D013053:Spectrophotometry; D014494:Unithiol / Q000737:chemistry*; D014638:Vanadates / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*
D002614:Chelating Agents; D014639:Vanadium; C075743:oxovanadium IV; D014638:Vanadates; D014494:Unithiol