Synergistic Effect of Tartaric Acid in the Extraction of Iron(III) from Aqueous Nitrate by Di(2-ethyl hexyl)phosphoric Acid in Hexane

Victoria SALVADÓ; Amalia MASANA; Mamoun MUHAMMED; Maria MUÑOZ; Manuel VALIENTE

doi:10.2116/analsci.6.867

Victoria SALVADÓ, Amalia MASANA, Mamoun MUHAMMED, Maria MUÑOZ, Manuel VALIENTE

著者情報

キーワード: Iron(III), di(2-ethyl hexyl)phosphoric acid, solvent extraction, synergistic effect, tartaric acid, radiotracer determination

ジャーナルフリー

1990 年 6 巻 6 号 p. 867-870

DOI https://doi.org/10.2116/analsci.6.867

詳細

抄録

The addition of tartaric acid to aqueous nitrate solutions containing Fe(III) produces an increase in the solvent extraction of Fe(III) by di(2-ethyl hexyl)phosphoric acid, DEHPA, in hexane solutions. This effect has been studied and it is explained in terms of chemical equilibrium between the two liquid phases by applying the following reactions: Fe³⁺+L^2-_??_FeL⁺; eq. const. Log β=7.18±0.03 and FeL⁺(HA)_2org_??_Fe(LA)_org+H⁺; log β=13.80±0.01. Here, HA stands for DEHPA and L represents tartaric acid. Such behavior determines the formation of a FeLA(HA) metal complex species of mixed ligand composition in the organic phase.

責任著者(Corresponding author)

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