Equilibrium, kinetics and thermodynamics studies of Cd sorption onto a dithizone-impregnated Amberchrom CG-300m polymer resin
| Autor: | Francois Wewers, André R.L. Spies |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Sorbent Aqueous solution General Chemical Engineering Kinetics Extraction (chemistry) Sorption 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Styrene lcsh:Chemistry chemistry.chemical_compound chemistry lcsh:QD1-999 Dithizone 0210 nano-technology Nuclear chemistry |
| Zdroj: | Arabian Journal of Chemistry, Vol 13, Iss 4, Pp 5050-5059 (2020) |
| ISSN: | 1878-5352 |
| Popis: | Amberchrom CG-300m, a styrene acrylic ester polymer resin, was studied for the first time as sorbent for metal ion sorption in a solid-phase extraction system. The polymer sorbent was modified via impregnation with dithizone to improve its efficiency. Efficiency of the modified sorbent improved by more than 47%. The loading capacity of the resin is 3.2 mg dithizone per gram of sorbent. The mechanisms of Cd(II) sorption from aqueous solutions are presented. Capacity of the modified resin for Cd(II) was investigated in batch experiments as a function of pH, initial metal ion concentration, temperature and time. Maximum capacity of 0.551 mg Cd(II) per gram of sorbent was achieved. The dimensionless separation factor, 0 0) while ΔS > 0 reflects the affinity of the sorbent towards Cd(II). The pseudo-second order model proved to be the best fit model for Cd(II) sorption kinetics data. Particle-diffusion models suggest sorption follows film as well as pore diffusion mechanisms. Keywords: Sorption, Impregnation, Dithizone, Kinetics, Diffusion, Thermodynamics |
| Databáze: | OpenAIRE |
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