Computer-augmented modeling studies of Pb(II) and Cd(II) complexes with maleic acid in ethylene glycol–water mixture. Issue 1 (1st October 2016)

• Record Type: Journal Article
• Authors: Nageswara Rao, Ch.; Srinu, Bogi; Gowri Kumari, V.; Sailaja, B. B. V.
• Is Part Of: Chemical speciation and bioavailability. Volume 28:Issue 1/4(2016)
• Page Start: 66
• Page End: 71
• Publication Date: 2016-10-01
• Subjects: Binary complexes -- maleic acid -- ethylene glycol (EG) -- stability constants; Speciation (Chemistry) -- Periodicals; Pollutants -- Biodegradation -- Periodicals; 363.7384
• DOI: 10.1080/09542299.2015.1109479
• Languages: English
• ISSNs: 2047-6523

Abstract

Abstract: Chemical speciation of binary complexes of Pb(II) and Cd(II) ions with maleic acid have been studied pH metrically in the concentration range of 0–50% v/v ethylene glycol (EG)–water mixtures maintaining an ionic strength of 0.16 molL −1 at 303 K. Alkalimetric titrations were carried out in different relative concentrations of metal and maleic acid. Stability constants of various models of binary complexes were refined with MINIQUAD75. The best-fit chemical models were selected based on statistical parameters and residual analysis. The species detected are ML2, ML3, and ML2 H for Pb(II) and Cd(II). The chemical speciation, metal bioavailability, and transportation are explained based on the distribution diagrams.