Vanadium speciation in aqueous solutions
- St. Petersburg State Univ., Petrodvorets (Russian Federation)
Information on the species of vanadium occurring in natural and waste water is limited. It is known that 35 to 50% of VO{sub 3}{sup -} is reduced to vanadium(IV) if the ratio between dissolved fulvic acids and VO{sub 3}{sup -} in the solution equals about 10. Correspondingly, depending on the composition of the dissolved impurities, compounds of both vanadium(IV) and vanadium(V) can occur in natural and waste water. In the region of pH close to neutral conditions, vanadium(V), depending on its concentration, occurs mainly in anionic species, from the monomeric form HVO{sub 4}{sup 2-} to polynuclear ones, in particular, V{sub 10}O{sub 28}{sup 6-}. In this pH region, vanadium(IV) also occurs in several ionic species: the vanadyl ion VO{sup 2+}, hydroxo complexes VOOH{sup +}, (VO){sub 2}(OH){sub 2}{sup 2+}, and VO(OH){sub 2}; and anionic species HV{sub 2}O{sub 5}{sup -} and V{sub 4}O{sub 9}{sup 2-}. Considering the variety of species of vanadium occurring in natural water, all available methods of separating and detecting these species must be used in developing procedures for the speciation analysis of vanadium. The aim of this work was to develop a procedure for analyzing particular species of vanadium in natural and waste water.
- OSTI ID:
- 161863
- Journal Information:
- Journal of Analytical Chemistry, Journal Name: Journal of Analytical Chemistry Journal Issue: 10 Vol. 50; ISSN 1061-9348; ISSN JACTE2
- Country of Publication:
- United States
- Language:
- English
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