Documents disponibles écrits par cet auteur

Applicability of new acrylic, weakly basic anion exchanger purolite A - 830 of very high capacity in removal of palladium(II) chloro - complexes / Anna Wolowicz in Industrial & engineering chemistry research, Vol. 51 N° 21 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 21 (Mai 2012) . - pp. 7223–7230 Titre : Applicability of new acrylic, weakly basic anion exchanger purolite A - 830 of very high capacity in removal of palladium(II) chloro - complexes Type de document : texte imprimé Auteurs : Anna Wolowicz, Auteur ; Zbigniew Hubicki, Auteur Année de publication : 2012 Article en page(s) : pp. 7223–7230 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Anion  exchanger Résumé : According to the manufacture description Purolite A-830 is a sorbent of very high capacity (2.75 eq/dm3), which was the main reason for examining its applicability in the removal of palladium(II) chloro-complexes from acidic solutions and comparison of its experimental capacity with other weakly basic anion exchangers. The influence of several parameters such as hydrochloric and nitric acids concentrations, competitive anions (effect of AlCl3 addition) and temperature increase were studied. Sorption isotherms were obtained and modeled using the Langmuir and the Freundlich model. The influences of agitation speed, palladium concentration, and particle size on sorption kinetics were considered. Kinetic curves were modeled using the pseudo-first- and pseudo-second-order kinetic equations. According to the evaluation using the Langmuir equation, the maximum sorption capacity obtained from the Langmuir isotherm was equal to 356.88 mg Pd(II)/g. The reduction of Pd(II) uptake was observed with the increasing concentration of chloride ions, temperature, and AlCl3 addition. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25948463 [article] Applicability of new acrylic, weakly basic anion exchanger purolite A - 830 of very high capacity in removal of palladium(II) chloro - complexes [texte imprimé] / Anna Wolowicz, Auteur ; Zbigniew Hubicki, Auteur . - 2012 . - pp. 7223–7230. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 21 (Mai 2012) . - pp. 7223–7230 Mots-clés : Anion  exchanger Résumé : According to the manufacture description Purolite A-830 is a sorbent of very high capacity (2.75 eq/dm3), which was the main reason for examining its applicability in the removal of palladium(II) chloro-complexes from acidic solutions and comparison of its experimental capacity with other weakly basic anion exchangers. The influence of several parameters such as hydrochloric and nitric acids concentrations, competitive anions (effect of AlCl3 addition) and temperature increase were studied. Sorption isotherms were obtained and modeled using the Langmuir and the Freundlich model. The influences of agitation speed, palladium concentration, and particle size on sorption kinetics were considered. Kinetic curves were modeled using the pseudo-first- and pseudo-second-order kinetic equations. According to the evaluation using the Langmuir equation, the maximum sorption capacity obtained from the Langmuir isotherm was equal to 356.88 mg Pd(II)/g. The reduction of Pd(II) uptake was observed with the increasing concentration of chloride ions, temperature, and AlCl3 addition. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25948463

Ion exchange recovery of palladium(II) from acidic solutions using monodisperse lewatit SR-7 / Anna Wolowicz in Industrial & engineering chemistry research, Vol. 51 N° 51 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16688–16696 Titre : Ion exchange recovery of palladium(II) from acidic solutions using monodisperse lewatit SR-7 Type de document : texte imprimé Auteurs : Anna Wolowicz, Auteur ; Zbigniew Hubicki, Auteur Année de publication : 2012 Article en page(s) : pp. 16688–16696 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ion  exchange  Acidic  solutions Résumé : This work focuses on the sorption recovery of palladium(II) present in chloride and chloride–nitrate(V) solutions on the commercial strongly basic anion exchanger Lewatit MonoPlus SR-7. Sorption, kinetic, and equilibrium studies were carried out using batch and dynamic methods. The basic parameters of sorption capacity, recovery degree, distribution coefficient, process rate, and half-exchange time were calculated. Effects of agitation speed, initial palladium(II) concentration, and total concentration of the chloride anions were tested. Regeneration and reuse of the resin was also investigated. The surface morphology of Lewatit MonoPlus SR-7 before and after the sorption process was described. Lewatit MonoPlus SR-7 is an efficient sorbent for Pd(II) ions (Langmuir capacity 197 mg/g), is characterized by good kinetic properties, and can be regenerated and reused repeatedly without decrease of capacity. Moreover, its capacity is high but decreases in the presence of aluminum ions and slightly increases with the temperature (313 K). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302304c [article] Ion exchange recovery of palladium(II) from acidic solutions using monodisperse lewatit SR-7 [texte imprimé] / Anna Wolowicz, Auteur ; Zbigniew Hubicki, Auteur . - 2012 . - pp. 16688–16696. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16688–16696 Mots-clés : Ion  exchange  Acidic  solutions Résumé : This work focuses on the sorption recovery of palladium(II) present in chloride and chloride–nitrate(V) solutions on the commercial strongly basic anion exchanger Lewatit MonoPlus SR-7. Sorption, kinetic, and equilibrium studies were carried out using batch and dynamic methods. The basic parameters of sorption capacity, recovery degree, distribution coefficient, process rate, and half-exchange time were calculated. Effects of agitation speed, initial palladium(II) concentration, and total concentration of the chloride anions were tested. Regeneration and reuse of the resin was also investigated. The surface morphology of Lewatit MonoPlus SR-7 before and after the sorption process was described. Lewatit MonoPlus SR-7 is an efficient sorbent for Pd(II) ions (Langmuir capacity 197 mg/g), is characterized by good kinetic properties, and can be regenerated and reused repeatedly without decrease of capacity. Moreover, its capacity is high but decreases in the presence of aluminum ions and slightly increases with the temperature (313 K). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302304c