Documents disponibles écrits par cet auteur

Coupling Ion Exchange and Biosorption for Copper(II) Removal From Wastewaters / Anna Gorka in Industrial & engineering chemistry research, Vol. 50 N° 6 (Mars 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3494–3502 Titre : Coupling Ion Exchange and Biosorption for Copper(II) Removal From Wastewaters Type de document : texte imprimé Auteurs : Anna Gorka, Auteur ; Justyna Zamorska, Auteur ; Dorota Antos, Auteur Année de publication : 2011 Article en page(s) : pp. 3494–3502 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ion  exchange  Removal  wastewaters Résumé : A coupled process of ion exchange and biosorption for recovery of copper(II) from wastewater has been proposed. In this process a cation exchanger has been used as a carrier for the biofilm formation. Two different types of microorganisms capable for copper biosorption have been selected for immobilization, i.e, effective microorganisms and activated sludge microorganisms. As a regenerating agent solutions of sodium bicarbonate with aqueous ammonia as an additive have been used, which allowed operating the column under mild pH conditions. The activity of biofilm was preserved after the cyclic process of ion exchange and regeneration. The effect of biofilm on the mass transfer kinetics and the ion exchange equilibrium was quantified by comparing the efficiency of ion exchange on the fresh bed and that covered by biofilm. The linear driving force model was used for simulations of the process dynamics. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101019s [article] Coupling Ion Exchange and Biosorption for Copper(II) Removal From Wastewaters [texte imprimé] / Anna Gorka, Auteur ; Justyna Zamorska, Auteur ; Dorota Antos, Auteur . - 2011 . - pp. 3494–3502. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3494–3502 Mots-clés : Ion  exchange  Removal  wastewaters Résumé : A coupled process of ion exchange and biosorption for recovery of copper(II) from wastewater has been proposed. In this process a cation exchanger has been used as a carrier for the biofilm formation. Two different types of microorganisms capable for copper biosorption have been selected for immobilization, i.e, effective microorganisms and activated sludge microorganisms. As a regenerating agent solutions of sodium bicarbonate with aqueous ammonia as an additive have been used, which allowed operating the column under mild pH conditions. The activity of biofilm was preserved after the cyclic process of ion exchange and regeneration. The effect of biofilm on the mass transfer kinetics and the ion exchange equilibrium was quantified by comparing the efficiency of ion exchange on the fresh bed and that covered by biofilm. The linear driving force model was used for simulations of the process dynamics. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101019s

The influence of biofilm on the effectiveness of ion exchange process / Anna Gorka in Industrial & engineering chemistry research, Vol. 47 N°19 (Octobre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°19 (Octobre 2008) . - p. 7456–7464 Titre : The influence of biofilm on the effectiveness of ion exchange process Type de document : texte imprimé Auteurs : Anna Gorka, Auteur ; Dorota Papciak, Auteur ; Justyna Zamorska, Auteur Année de publication : 2008 Article en page(s) : p. 7456–7464 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Ammonia--ion  exchange  Zeolite  Biofilm  Fluidized  bed  reactor  Plug  flow  reactor Résumé : The ion exchange of ammonia in a synthetic zeolite has been investigated in the presence of Biofilm of nitrifying bacteria. The Biofilm has been cultivated on the zeolite carrier under different hydrodynamic conditions in a plug flow reactor and in a fluidized bed reactor. Samples of the carrier covered by Biofilm have been withdrawn from the reactors and packed into a miniature ion exchange column that has been used to analyze the ion exchange characteristics, i.e., to determine ion exchange equilibria and the mass transport kinetics. For this purpose, the breakthrough curves have been registered at different ammonia loadings and different concentrations of sodium bicarbonate in the solution. To analyze the mass transport mechanism and quantify kinetic coefficients, we have exploited a linear driving force model (i.e., the LDF model) and the generalized model. The ion exchange and mass transfer characteristics of the Biofilm-covered carrier have been compared to those of the virgin zeolite. The effect of Biofilm on the mass transfer kinetics and ion exchange capacity was found to be induced by swelling properties of zeolite. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8002057 [article] The influence of biofilm on the effectiveness of ion exchange process [texte imprimé] / Anna Gorka, Auteur ; Dorota Papciak, Auteur ; Justyna Zamorska, Auteur . - 2008 . - p. 7456–7464. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°19 (Octobre 2008) . - p. 7456–7464 Mots-clés : Ammonia--ion  exchange  Zeolite  Biofilm  Fluidized  bed  reactor  Plug  flow  reactor Résumé : The ion exchange of ammonia in a synthetic zeolite has been investigated in the presence of Biofilm of nitrifying bacteria. The Biofilm has been cultivated on the zeolite carrier under different hydrodynamic conditions in a plug flow reactor and in a fluidized bed reactor. Samples of the carrier covered by Biofilm have been withdrawn from the reactors and packed into a miniature ion exchange column that has been used to analyze the ion exchange characteristics, i.e., to determine ion exchange equilibria and the mass transport kinetics. For this purpose, the breakthrough curves have been registered at different ammonia loadings and different concentrations of sodium bicarbonate in the solution. To analyze the mass transport mechanism and quantify kinetic coefficients, we have exploited a linear driving force model (i.e., the LDF model) and the generalized model. The ion exchange and mass transfer characteristics of the Biofilm-covered carrier have been compared to those of the virgin zeolite. The effect of Biofilm on the mass transfer kinetics and ion exchange capacity was found to be induced by swelling properties of zeolite. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8002057