Hi Orhun!

well I hope this paper can help you.

"Adsorptive recovery of vanadium(V) from chromium(VI)-containing

effluent by Zr(IV)-loaded orange juice residue"

Chemical Engineering Journal 248 (2014) 79–88

Best regards

Yahya

 Dear Orhun,

You may use the following links:

1-Rate constant for the reaction of chromium(II) with vanadium(IV). A competition study

Andreja. Bakac, James H. Espenson

Inorg. Chem., 1981, 20 (3), pp 953–954

DOI: 10.1021/ic50217a066

Publication Date: March 1981

http://pubs.acs.org/doi/abs/10.1021/ic50217a066

2-Kinetics of the Reaction ot Vanadium(III) and Chromium (II) Ions in Acid Solution. Evidence for a Binuclear Reaction Intermediate

James H. Espenson

Inorg. Chem., 1965, 4 (7), pp 1025–1029

DOI: 10.1021/ic50029a023

Publication Date: July 1965

http://pubs.acs.org/doi/abs/10.1021/ic50029a023?journalCode=inocaj

3-Talanta. 1971 Mar;18(3):361-4.

An analytical study of the vanadium(IV)-chromium(VI) reaction.

Sriramam K1.

Author information

Abstract

Experimental conditions for reduction of chromium(VI) by vanadiuin(IV) are described. An excess of vanadium(IV) is necessary. The evidence indicates that the direct titration fails for kinetic rather than thermodynamic reasons, but that the back-titration procedure is made quantitative by the slow rate of the reverse reaction between vanadium(V) and chromium(III).

http://www.ncbi.nlm.nih.gov/pubmed/18960891

Hoping this will be helpful,

Rafik