Research Article

Use of Ethylenediaminetetraacetic Acid as a Scavenger for Chromium from “Wet Blue” Leather Waste: Thermodynamic and Kinetics Parameters

Table 4

Higher energies of nonbonding interactions between NBOs in the coordination sphere for complexes of Cr+6 kcal·mol−1.

Cr+6 (EDTA) Cr+6 (NTA)(H2O)2Cr+6 (collagen)

 9.11 4.45 2.81
 7.15 3.90  2.63
 6.44 3.74 2.52
 2.37 2.63 1.21