Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry (Jun 2012)

ENVIRONMENTALLY FRIENDLY COMPLEXONES. THE THERMODYNAMIC CHARACTERISTICS OF THE FORMATION OF AL3+ ION COMPLEXES WITH ETHYLENEDIAMINEDISUCCINIC ACID IN AQUEOUS SOLUTIONS

  • L.N. Tolkacheva,
  • T.V. Saprunova,
  • V.M. Nikol`skii,
  • A.A. Yakovlev

Journal volume & issue
Vol. 7, no. 1
pp. 70 – 73

Abstract

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Complex formation between Al3+ and ethylenediamine - N,N`-disuccinic acid (H4L) was studied at 25°C against the background of 0.1, 0.5, 1.0 N solutions of KNO3 by potentiometry and mathematical modeling. The extrapolation of concentration constants to zero ionic strength was used to calculate the thermodynamic constants of the formation of the AlL–, AlHL complexes using an equation with one individual parameter (logβ0 = 16.27 ± 0.07, 9.19 ± 0.2 respectively).

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