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Recovery of actinides and lanthanides from high-level waste using hollow-fiber supported liquid membrane with TODGA as the carrier / Seraj A. Ansari in Industrial & engineering chemistry research, Vol. 48 N° 18 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8605–8612 Titre : Recovery of actinides and lanthanides from high-level waste using hollow-fiber supported liquid membrane with TODGA as the carrier Type de document : texte imprimé Auteurs : Seraj A. Ansari, Auteur ; Prasanta K. Mohapatra, Auteur ; Vijay K. Manchanda, Auteur Année de publication : 2010 Article en page(s) : pp. 8605–8612 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Trivalent  actinides/lanthanides  Hollow-fiber  supported  liquid  membrane  Normal  paraffinic  hydrocarbon Résumé : Transport behavior of trivalent actinides/lanthanides from nitric acid solutions into distilled water was investigated using polypropylene hollow-fiber supported liquid membrane (HFSLM) technique. A mixture of 0.1 M TODGA (N,N,N′,N′-tetraoctyl diglycolamide) + 0.5 M DHOA (N,N-dihexyl octanamide) dissolved in normal paraffinic hydrocarbon (NPH) was optimized as a suitable carrier. The permeability of the transported metal species was calculated with the help of various diffusional parameters. The permeation of metal ions increased with the feed acidity; however, their transport rates were significantly affected at higher acidity (>3 M HNO3) owing to carrier-aided co-transport of nitric acid. Mass transfer coefficients were calculated on the basis of the described model, whose success was verified by excellent matching of the membrane diffusion coefficient values calculated by the given model and Wilke−Chang equation. Quantitative transport of trivalent actinides and lanthanides was achieved in 30 min from pressurized heavy water reactor simulated high-level nuclear waste. The stability of the HFSLM system was found to be satisfactory in eight successive runs. The results suggested the possible application of TODGA-HFSLM system for the recovery of actinides from high-level wastes. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900265y [article] Recovery of actinides and lanthanides from high-level waste using hollow-fiber supported liquid membrane with TODGA as the carrier [texte imprimé] / Seraj A. Ansari, Auteur ; Prasanta K. Mohapatra, Auteur ; Vijay K. Manchanda, Auteur . - 2010 . - pp. 8605–8612. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8605–8612 Mots-clés : Trivalent  actinides/lanthanides  Hollow-fiber  supported  liquid  membrane  Normal  paraffinic  hydrocarbon Résumé : Transport behavior of trivalent actinides/lanthanides from nitric acid solutions into distilled water was investigated using polypropylene hollow-fiber supported liquid membrane (HFSLM) technique. A mixture of 0.1 M TODGA (N,N,N′,N′-tetraoctyl diglycolamide) + 0.5 M DHOA (N,N-dihexyl octanamide) dissolved in normal paraffinic hydrocarbon (NPH) was optimized as a suitable carrier. The permeability of the transported metal species was calculated with the help of various diffusional parameters. The permeation of metal ions increased with the feed acidity; however, their transport rates were significantly affected at higher acidity (>3 M HNO3) owing to carrier-aided co-transport of nitric acid. Mass transfer coefficients were calculated on the basis of the described model, whose success was verified by excellent matching of the membrane diffusion coefficient values calculated by the given model and Wilke−Chang equation. Quantitative transport of trivalent actinides and lanthanides was achieved in 30 min from pressurized heavy water reactor simulated high-level nuclear waste. The stability of the HFSLM system was found to be satisfactory in eight successive runs. The results suggested the possible application of TODGA-HFSLM system for the recovery of actinides from high-level wastes. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900265y