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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

Heavy Metal Ions Removal in the Presence of 1-Hydroxyethane-1,1-diphosphonic Acid From Aqueous Solutions on Polystyrene Anion Exchangers / Dorota Kołodyńska in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10584–10593 Titre : Heavy Metal Ions Removal in the Presence of 1-Hydroxyethane-1,1-diphosphonic Acid From Aqueous Solutions on Polystyrene Anion Exchangers Type de document : texte imprimé Auteurs : Dorota Kołodyńska, Auteur ; Zbigniew Hubicki, Auteur ; Alicja Skiba, Auteur Année de publication : 2010 Article en page(s) : pp. 10584–10593 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Heavy  Metal--Removal--Presence--1-Hydroxyethane-1--1-diphosphonic--Acid--Aqueous--Solutions--Polystyrene--Anion  Exchangers Résumé : In the presented paper, the ability of commercially available gel and macroporous polystyrene anion exchangers for the removal of copper(II), zinc(II), nickel(II), and cadmium(II) complexes with 1-hydroxyethane-1,1-diphosphonic acid (HEDP) from aqueous solutions was investigated under various experimental conditions. In the experiments, the strongly basic anion exchangers Lewatit MonoPlus M 600, Lewatit MonoPlus MP 500, and Amberlite IRA 402 with the quaternary ammonium functional groups as well as the medium basic anion exchanger Lewatit MonoPlus MP 64 with the quaternary ammonium/tertiary amine functional groups were used. Special attention was paid to the concentration of heavy metal ions, M(II)−HEDP molar ratio, pH of solutions, temperature, and the physicochemical properties of the anion exchangers used. The effect of the interfered ions such as Ca(II), Mg(II), Cl−, NO3−, and SO42− on the efficiency of heavy metal complexes with HEDP sorption was also investigated. It was found that polystyrene anion exchangers rapidly sorbed the test metal complexes with HEDP, and the process became saturated in 20 min. The sorption kinetic data showed pseudo-second-order reaction kinetics rather than the pseudo-first-order kinetics. The adsorption behavior of Cu(II), Zn(II), Ni(II), and Cd(II) complexes with HEDP was studied in single as well as in multicomponent competitive systems. The obtained data were fitted well by the Langmuir adsorption isotherm model. Maximum sorption capacities for Cu(II), Zn(II), Ni(II), and Cd(II) complexes with HEDP occurred for strongly basic anion exchanger Lewatit MonoPlus M 600 at the optimal pH 11.5 and were found to be 96.15, 80.64, 70.42, and 142.85 mg/g, respectively. For binary and quaternary metal complexes solutions, these values were smaller than those from single metal solutions. The presence of Cu(II) and Zn(II) complexes more strongly inhibited Ni(II) and Cd(II) once sorption occured which indicates their greater affinity than that of the remaining complexes for the anion exchangers. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901195j [article] Heavy Metal Ions Removal in the Presence of 1-Hydroxyethane-1,1-diphosphonic Acid From Aqueous Solutions on Polystyrene Anion Exchangers [texte imprimé] / Dorota Kołodyńska, Auteur ; Zbigniew Hubicki, Auteur ; Alicja Skiba, Auteur . - 2010 . - pp. 10584–10593. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10584–10593 Mots-clés : Heavy  Metal--Removal--Presence--1-Hydroxyethane-1--1-diphosphonic--Acid--Aqueous--Solutions--Polystyrene--Anion  Exchangers Résumé : In the presented paper, the ability of commercially available gel and macroporous polystyrene anion exchangers for the removal of copper(II), zinc(II), nickel(II), and cadmium(II) complexes with 1-hydroxyethane-1,1-diphosphonic acid (HEDP) from aqueous solutions was investigated under various experimental conditions. In the experiments, the strongly basic anion exchangers Lewatit MonoPlus M 600, Lewatit MonoPlus MP 500, and Amberlite IRA 402 with the quaternary ammonium functional groups as well as the medium basic anion exchanger Lewatit MonoPlus MP 64 with the quaternary ammonium/tertiary amine functional groups were used. Special attention was paid to the concentration of heavy metal ions, M(II)−HEDP molar ratio, pH of solutions, temperature, and the physicochemical properties of the anion exchangers used. The effect of the interfered ions such as Ca(II), Mg(II), Cl−, NO3−, and SO42− on the efficiency of heavy metal complexes with HEDP sorption was also investigated. It was found that polystyrene anion exchangers rapidly sorbed the test metal complexes with HEDP, and the process became saturated in 20 min. The sorption kinetic data showed pseudo-second-order reaction kinetics rather than the pseudo-first-order kinetics. The adsorption behavior of Cu(II), Zn(II), Ni(II), and Cd(II) complexes with HEDP was studied in single as well as in multicomponent competitive systems. The obtained data were fitted well by the Langmuir adsorption isotherm model. Maximum sorption capacities for Cu(II), Zn(II), Ni(II), and Cd(II) complexes with HEDP occurred for strongly basic anion exchanger Lewatit MonoPlus M 600 at the optimal pH 11.5 and were found to be 96.15, 80.64, 70.42, and 142.85 mg/g, respectively. For binary and quaternary metal complexes solutions, these values were smaller than those from single metal solutions. The presence of Cu(II) and Zn(II) complexes more strongly inhibited Ni(II) and Cd(II) once sorption occured which indicates their greater affinity than that of the remaining complexes for the anion exchangers. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901195j

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

Sorption of Cd(II), Pb(II), Cu(II), and Zn(II) complexes with nitrilotris(Methylenephosphonic) acid on polystyrene anion exchangers / Marcin Siek in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4700–4709 Titre : Sorption of Cd(II), Pb(II), Cu(II), and Zn(II) complexes with nitrilotris(Methylenephosphonic) acid on polystyrene anion exchangers Type de document : texte imprimé Auteurs : Marcin Siek, Auteur ; Dorota Kolodynska, Auteur ; Zbigniew Hubicki, Auteur Année de publication : 2010 Article en page(s) : pp. 4700–4709 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Anion  exchangers Résumé : The performance of the polystyrene anion exchangers Lewatit MonoPlus M 500, Lewatit MonoPlus M 600, Lewatit MonoPlus MP 500, Lewatit MonoPlus MP 64, and Lewatit MP 62 as well as Amberlyst A 21 was investigated for their further application in purification of wastewaters containing nitrilotris(methylenephosphonic acid) (NTMP) and heavy metal ions. The comparison involved evaluation of the sorption/desorption behavior of NTMP complexes of Cd(II), Pb(II), Cu(II), and Zn(II) on the resins with different basicity of functional groups. The batch method, in which a fixed amount of anion exchanger was contacted with the sample solution for increasing periods of time and the amount of metal ion remaining in the solution measured as a function of the elapsed time, was used to obtain information on the kinetics of species formed in the presence of added complexing agent. The effects of pH, metal(II) ion and ligand concentration, and their molar ratio on the sorption as well as type of functional groups of the anion exchangers used were determined. The sorption data were fitted to various models to obtain certain constants related to the sorption phenomena. The effect of the regeneration solution was also investigated. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901748k [article] Sorption of Cd(II), Pb(II), Cu(II), and Zn(II) complexes with nitrilotris(Methylenephosphonic) acid on polystyrene anion exchangers [texte imprimé] / Marcin Siek, Auteur ; Dorota Kolodynska, Auteur ; Zbigniew Hubicki, Auteur . - 2010 . - pp. 4700–4709. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4700–4709 Mots-clés : Anion  exchangers Résumé : The performance of the polystyrene anion exchangers Lewatit MonoPlus M 500, Lewatit MonoPlus M 600, Lewatit MonoPlus MP 500, Lewatit MonoPlus MP 64, and Lewatit MP 62 as well as Amberlyst A 21 was investigated for their further application in purification of wastewaters containing nitrilotris(methylenephosphonic acid) (NTMP) and heavy metal ions. The comparison involved evaluation of the sorption/desorption behavior of NTMP complexes of Cd(II), Pb(II), Cu(II), and Zn(II) on the resins with different basicity of functional groups. The batch method, in which a fixed amount of anion exchanger was contacted with the sample solution for increasing periods of time and the amount of metal ion remaining in the solution measured as a function of the elapsed time, was used to obtain information on the kinetics of species formed in the presence of added complexing agent. The effects of pH, metal(II) ion and ligand concentration, and their molar ratio on the sorption as well as type of functional groups of the anion exchangers used were determined. The sorption data were fitted to various models to obtain certain constants related to the sorption phenomena. The effect of the regeneration solution was also investigated. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901748k