Single and binary component sorption of the fission products Sr2+, Cs+ and Co2+ from aqueous solutions onto sulphate reducing bacteria / N. Ngwenya in Minerals engineering, Vol. 23 N° 6 (Mai 2010)  

Public ISBD [article]  inMinerals engineering > Vol. 23 N° 6 (Mai 2010) . - pp. 463–470 Titre : Single and binary component sorption of the fission products Sr2+, Cs+ and Co2+ from aqueous solutions onto sulphate reducing bacteria Type de document : texte imprimé Auteurs : N. Ngwenya, Auteur ; E. M. N. Chirwa, Auteur Année de publication : 2011 Article en page(s) : pp. 463–470 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Spent fuel reprocessing Sulphate reducing bacteria Nuclear waste processing Résumé : This study investigates the removal of the fission products Sr2+, Cs+ and Co2+ in single and binary metal solutions by a sulphate reducing bacteria (SRB) biomass. The effect of initial concentration and pH on the sorption kinetics of each metal was evaluated in single metal solutions. Binary component equilibrium sorption studies were performed to investigate the competitive binding behaviour of each metal in the presence of a secondary metal ion. Results obtained from single metal equilibrium sorption studies indicated that SRB have a higher binding capacity for Sr2+ (qmax = 416.7 mg g−1), followed by Cs+ (qmax = 238.1 mg g−1), and lastly Co2+ (qmax = 204.1 mg g−1). Among the binary systems investigated, Co2+ uptake was the most sensitive, resulting in a 76% reduction of the sorption capacity (qmax) in the presence of Cs+. These findings are significant for future development of effective biological processes for radioactive waste management under realistic conditions. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509002842 [article] Single and binary component sorption of the fission products Sr2+, Cs+ and Co2+ from aqueous solutions onto sulphate reducing bacteria [texte imprimé] / N. Ngwenya, Auteur ; E. M. N. Chirwa, Auteur . - 2011 . - pp. 463–470. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 6 (Mai 2010) . - pp. 463–470 Mots-clés : Spent fuel reprocessing Sulphate reducing bacteria Nuclear waste processing Résumé : This study investigates the removal of the fission products Sr2+, Cs+ and Co2+ in single and binary metal solutions by a sulphate reducing bacteria (SRB) biomass. The effect of initial concentration and pH on the sorption kinetics of each metal was evaluated in single metal solutions. Binary component equilibrium sorption studies were performed to investigate the competitive binding behaviour of each metal in the presence of a secondary metal ion. Results obtained from single metal equilibrium sorption studies indicated that SRB have a higher binding capacity for Sr2+ (qmax = 416.7 mg g−1), followed by Cs+ (qmax = 238.1 mg g−1), and lastly Co2+ (qmax = 204.1 mg g−1). Among the binary systems investigated, Co2+ uptake was the most sensitive, resulting in a 76% reduction of the sorption capacity (qmax) in the presence of Cs+. These findings are significant for future development of effective biological processes for radioactive waste management under realistic conditions. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509002842

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