Adsorption wave of vanadium complex with 2,3–dihydroxybenzaldehyde
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2018-03-27 12:50
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CHIRIAC, Liudmila, CECOI, Natalia, CAZAC, Tatiana, REVENCO, Mihail. Adsorption wave of vanadium complex with 2,3–dihydroxybenzaldehyde . In: Chemistry Journal of Moldova, 2009, nr. 2(4), pp. 24-27. ISSN 1857-1727.
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Chemistry Journal of Moldova
Numărul 2(4) / 2009 / ISSN 1857-1727 /ISSNe 2345-1688

Adsorption wave of vanadium complex with 2,3–dihydroxybenzaldehyde

Pag. 24-27

Chiriac Liudmila1, Cecoi Natalia1, Cazac Tatiana1, Revenco Mihail2
 
1 Institutul de Chimie al AŞM,
2 Universitatea de Stat din Moldova
 
Disponibil în IBN: 2 decembrie 2013


Rezumat

The polarographic behavior of the complex formed by V(V) and 2,3–dihydroxybenzaldehyde (2,3–DHBA) in the solution containing acetate buffer (pH 5,2) has been investigated. By means of a.c. polarography, chronovoltammetry and other techniques, it has been shown that the electrode process is complicated by the adsorption of 2,3-DHBA and its vanadium complex. The kinetic and adsorption parameters of the electrode process have been determined: adsorption equilibrium constant B= 1,32⋅105 mol-1⋅dm3, the attraction constant γ = 1,2, the maximum surface concentration Г max = 9,10⋅10-11 mol⋅ cm-2; the share of the electrode surface occupied by one particle of the adsorbed complex S = 1,81 nm2 and the free adsorption energy ∆G = - 39,1 kJ· mol-1.

Cuvinte-cheie
voltammetry, 3–dihydroxybenzaldehyde,

2, vanadium