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Título: | The phosphine oxides Cyanex 921 and Cyanex 923 as carriers for facilitated transport of chromium (VI)-chloride aqueous solutions |
Autor: | Alguacil, Francisco José CSIC ORCID; López-Delgado, Aurora CSIC ORCID ; Alonso Gámez, Manuel CSIC; Sastre, Ana María | Palabras clave: | Facilitated transport Cyanex 921 Cyanex 923 Chromium (VI) |
Fecha de publicación: | nov-2004 | Editor: | Elsevier | Citación: | Chemosphere 57 (8) : 813-819 (2004) | Resumen: | The behaviour of the phosphine oxides Cyanex 921 and Cyanex 923 in the facilitated transport of chromium (VI) from chloride solutions is described. Transport is studied as a function of several variables such as stirring speeds of the aqueous phases, membrane phase diluent, hydrochloric acid concentration in the source phase and chromium and carrier concentrations. The separation of chromium (VI) from other metals presented in the source phase as well as the behaviour of phosphine oxides with respect to other neutral organophosphorous derivatives (tri-n-butylphosphate (TBP) and dibutyl butylphosphonate (DBBP)) are also investigated. Moreover, by using hydrazine sulphate in the receiving phase, Cr(VI) is immediately reduced to the less toxic Cr(III). | Versión del editor: | http://dx.doi.org/10.1016/j.chemosphere.2004.07.019 | URI: | http://hdl.handle.net/10261/36578 | DOI: | 10.1016/j.chemosphere.2004.07.019 | ISSN: | 0045-6535 |
Aparece en las colecciones: | (CENIM) Artículos |
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