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Journal of Chemistry
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2014
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Article
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Tab 1
/
Research Article
Use of Ethylenediaminetetraacetic Acid as a Scavenger for Chromium from “Wet Blue” Leather Waste: Thermodynamic and Kinetics Parameters
Table 1
Variation of the Gibbs free energy for complexation reaction in kcal·mol
−1
.
Complex
Charge on the Cr atom
Cr(EDTA)
+6
−322.75
0.00
Cr(EDTA)
+3
−316.99
5.76
Cr(NTA)(H
2
O)
2
+6
−311.02
11.73
Cr(NTA)(H
2
O)
2
+3
−305.93
16.82
Cr(collagen)
+6
−289.70
33.05
Cr(collagen)
+3
−286.66
36.09