Thermodynamic Characteristics of the Complexation between Pb~(2+) and N,N-Bis(carboxymethyl)aspartic Acid in Aqueous Solution

摘要

The enthalpies of complexation between N,N-bis(carboxymethyl)aspartic acid (H4Y) and the Pb~(2+) ion at 298.15 K were determined from calorimetric data for a wide range of the ionic strengths (KNO3). The thermodynamic characteristics △H, △G, and △S, of formation of the complexes PbHY~- and PbY~(2-) were calculated for zero and fixed ionic strengths. The results obtained were interpreted.