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Comparison of the batch and breakthrough properties of stable and plain alginate microcapsules with a chelating resin and an ion exchanger in Ag+adsorption / Mohammad Outokesh in Industrial & engineering chemistry research, Vol. 47 N°17 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6742–6752 Titre : Comparison of the batch and breakthrough properties of stable and plain alginate microcapsules with a chelating resin and an ion exchanger in Ag+adsorption Type de document : texte imprimé Auteurs : Mohammad Outokesh, Auteur ; Yuichi Niibori, Auteur ; Hitoshi Mimura, Auteur Année de publication : 2008 Article en page(s) : p. 6742–6752 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Alginate  microcapsules  Ag+  adsorption  Ion  exchanger Résumé : A comparative study on the uptake properties of alginate microcapsules containing Cyanex 302 extractant, Lewatite TP 214 chelating resin, and Amberlite 200CT strongly acidic ion exchanger has been conducted using Ag+ as the target ion. The study resulted in an analytical formula, as well as three phenomenological breakthrough formulas that are also applicable in other fixed-bed operations. It also demonstrated a close similarity of the uptake properties of alginate microcapsules (MCs) and the chelating resins. Advantages of MCs over chelating resins include ease of preparation, ability to immobilize different extractants, and, most remarkably, an enormous distribution factor (Kd ≈ 106 cm3/g). As for the stabilization of MCs, two different methods of coating and matrix modification were applied; the latter proved to be superior, because of enhancement of both the uptake capacity and the column performance. Another achievement of the current study was the discovery of a new method for estimating the thickness of the coating layer of MCs. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071200n [article] Comparison of the batch and breakthrough properties of stable and plain alginate microcapsules with a chelating resin and an ion exchanger in Ag+adsorption [texte imprimé] / Mohammad Outokesh, Auteur ; Yuichi Niibori, Auteur ; Hitoshi Mimura, Auteur . - 2008 . - p. 6742–6752. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6742–6752 Mots-clés : Alginate  microcapsules  Ag+  adsorption  Ion  exchanger Résumé : A comparative study on the uptake properties of alginate microcapsules containing Cyanex 302 extractant, Lewatite TP 214 chelating resin, and Amberlite 200CT strongly acidic ion exchanger has been conducted using Ag+ as the target ion. The study resulted in an analytical formula, as well as three phenomenological breakthrough formulas that are also applicable in other fixed-bed operations. It also demonstrated a close similarity of the uptake properties of alginate microcapsules (MCs) and the chelating resins. Advantages of MCs over chelating resins include ease of preparation, ability to immobilize different extractants, and, most remarkably, an enormous distribution factor (Kd ≈ 106 cm3/g). As for the stabilization of MCs, two different methods of coating and matrix modification were applied; the latter proved to be superior, because of enhancement of both the uptake capacity and the column performance. Another achievement of the current study was the discovery of a new method for estimating the thickness of the coating layer of MCs. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071200n