Chemistry Journal of Moldova

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

Author(s):

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


Field:
Type:
Issue: 2012 Volume 7, no.1
Pages: 70-73
Keywords:

aluminum, ethylenediaminedisuccinic acid, derivatives of ethylenediaminedisuccinic acid, complex formation, complexones, thermodynamic constants, concentration constants.


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DOI:
dx.doi.org/10.19261/cjm.2012.07(1).10

Graphical Abstract: 
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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