Mathematical modeling of cadmium(II) solvent extraction from neutral and acidic chloride media using Cyanex
Visualitza/Obre
Article (340,9Kb) (Accés restringit)
Sol·licita una còpia a l'autor
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
10.1016/j.jhazmat.2010.07.004
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/10227
Tipus de documentArticle
Data publicació2010-07-29
EditorElsevier
Condicions d'accésAccés restringit per política de l'editorial
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
This paper describes experimental work and the mathematical modeling of solvent extraction of cadmium(
II) from neutral and acidic aqueous chloride media with a Cyanex 923 extractant in Exxol D-100.
Solvent extraction experiments were carried out to analyze the influence of variations in the composition
of the aqueous and organic phases on the efficiency of cadmium(II) extraction. In neutral and acidic
chloride conditions, the extraction of cadmium(II) by the organophosphorous extractant Cyanex 923 (L)
is based on the solvation mechanism of neutral HnCdCl(2+n) species and the formation of HnCdCl(2+n)Lq
complexes in the organic phase, where n=0, 1, 2 and q = 1, 2. The mathematical model of cadmium(II)
extraction was derived from the mass balances and chemical equilibria involved in the separation system.
The model was computed with the Matlab software. The equilibrium parameters for metal extraction,
i.e. the stability constants of the aqueous Cd–Cl complexes, the formation constants of the acidic Cd–Cl
species and the metal equilibrium extraction constants, were proposed. The optimized constants were
appropriate, as there was good agreement when the model was fitted to the experimental data for each
of the experiments.
CitacióLeopold, A.A. [et al.]. Mathematical modeling of cadmium(II) solvent extraction from neutral and acidic chloride media using Cyanex. "Journal of hazardous materials", 29 Juliol 2010, vol. 182, núm. 1-3, p. 903-911.
ISSN0304-3894
Versió de l'editorhttp://www.ncbi.nlm.nih.gov/pubmed/20673611
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
7darticle.pdf | Article | 340,9Kb | Accés restringit |