Kinetics of Forward Extraction of V(V) in V(V)-NO<sub>3</sub><sup>-</sup> (H<sup>+</sup>, Na<sup>+</sup>)-TOA-Kerosene System using Single Drop Technique

Authors

DOI:

https://doi.org/10.3329/jsr.v9i2.31113

Keywords:

Vanadium(V), TOPO, Kinetic, NO3- medium, Single drop technique.

Abstract

The titled system has been investigated using a single drop technique and flux (F) method of data treatment. In calculating fluxes, the time for drop formation and coalescence (?t = 0.75 s) is considered. At lower concentration region of vanadium, V(V), the rate of V(V) transfer is directly proportional to its concentration. With the increase in [V(V)], slowly extractable V(V) species are formed gradually resulting in decrease in rate. Rate is directly proportional to the square root of [TOA]. It is reported that the most favorable extractable V(V) species exists in maximum amount at pH 2, and so, log F vs pH plots show a maximum at pH~2. The flux of V(V) transfer in most cases is found to be decreased with increasing [NO3-]. Reaction orders with respect to [V(V)], pH and [NO3-] have been attempted to be estimated, but in vein due to non-linearity of plots in most cases. Activation energies for the present system is ~ -12 kJ/mol. This is unexpected but explained. Due to irregular variation of the composition of extractable species with [V(V)], [H+]; as well as temperature; it is not possible to elucidate the value of rate constant (k) and mechanism in simple way.

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Author Biographies

R. K. Biswas, Professor

Dept. of Applied Chemistry & Chemical Engineering,

Professor

A. K. Karmakar, Assistant Professor Dept. of Applied Chemistry and Chemical Engineering Rajshahi University Rajshahi-6205

Dept. of Applied Chemistry and Chemical Engineering

Assistant Professor

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Published

2017-04-20

How to Cite

Biswas, R. K., Karmakar, A. K., & Mottakin, M. (2017). Kinetics of Forward Extraction of V(V) in V(V)-NO<sub>3</sub><sup>-</sup> (H<sup>+</sup>, Na<sup>+</sup>)-TOA-Kerosene System using Single Drop Technique. Journal of Scientific Research, 9(2), 255–266. https://doi.org/10.3329/jsr.v9i2.31113

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Section

Section B: Chemical and Biological Sciences