Computer-augmented modeling studies of Pb(II) and Cd(II) complexes with maleic acid in ethylene glycol–water mixture

Chemical Speciation & Bioavailability

B. B. V. Sailaja¹  V. Gowri Kumari¹  Bogi Srinu¹  Ch. Nageswara Rao¹ 

[1] Andhra University;

关键词: Binary complexes;    maleic acid;    ethylene glycol (EG);    stability constants;   

DOI  :  10.1080/09542299.2015.1109479

来源: DOAJ

【 摘 要 】

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 ML2H for Pb(II) and Cd(II). The chemical speciation, metal bioavailability, and transportation are explained based on the distribution diagrams.

【 授权许可】

Unknown