Novel D2EHPA-polysiloxane-based Sorbent for Titanium (IV) Extraction and Separation
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedad Química de México
2011
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| _version_ | 1876483465842524160 |
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| author | León G. Mendoza-Reyes |
| author_facet | León G. Mendoza-Reyes |
| contents | Novel D2EHPA-polysiloxane-based Sorbent for Titanium (IV) Extraction and Separation León G. Mendoza-Reyes Eduardo Rodríguez de San Miguel Juan P. Sánchez-Guerrero Diana Y. Pardo-Gaytán Josefina de Gyves Multidisciplinaria (Ciencias Naturales y Exactas) solid Titanium (IV) polysiloxanes phase extraction In this work the synthesis, characterization and evaluation of a novel sorbent material used for the solid-phase extraction of titanium (IV) from hydrochloric acid medium is described. The material was prepared by the sol-gel route incorporating bis(2-ethylhexylphosphoric acid) (D2EHPA) as extractant within a polymeric matrix based on polysiloxanes and characterized through FTIR-ATR, XRD, 29Si and 31P NMR, TGA and DSC. In studies of titanium sorption and desorption in batch mode several factors related with the extraction and back-extraction operations were evaluated, such as: contact time, titanium concentration, nature and composition of the aqueous media, and extractant concentration in the sorbent. The maximum sorption was observed at 30 min of contact time in a 1 mol L-1 HCl + 0.1% KCl medium, while the maximum desorption was observed at 60 min in a 1.5 mol L-1 H2SO4 + 20% v/v H2O2 medium when titanium concentration was 70 mg L-1. Under optimal conditions the recovered percent of titanium was nearly 90%. In addition, the characterization of the extraction equilibrium was performed. The selectivity of the method was studied adding Al(III), Fe(III) and V(V) to the extraction medium. A high selectivity for Ti over Al and Fe was observed, even at high concentrations of the interferents; 50% of Ti, only 7% of Fe, 3% of Al and less than 1% of V were recovered under the established conditions. The method was finally applied for titanium recovery from a certified fly ash sample generated from a municipal incineration plant. 2011 artículo científico 1870-249X https://www.redalyc.org/articulo.oa?id=47521133002 en http://www.redalyc.org/revista.oa?id=475 Journal of the Mexican Chemical Society application/pdf Sociedad Química de México Journal of the Mexican Chemical Society (México) Num.2 Vol.55 |
| format | Artículo científico |
| id | redalyc_47521133002 |
| institution | Redalyc |
| language | en |
| publishDate | 2011 |
| publisher | Sociedad Química de México |
| spellingShingle | Novel D2EHPA-polysiloxane-based Sorbent for Titanium (IV) Extraction and Separation León G. Mendoza-Reyes Multidisciplinaria (Ciencias Naturales y Exactas) solid Titanium (IV) polysiloxanes phase extraction Novel D2EHPA-polysiloxane-based Sorbent for Titanium (IV) Extraction and Separation León G. Mendoza-Reyes Eduardo Rodríguez de San Miguel Juan P. Sánchez-Guerrero Diana Y. Pardo-Gaytán Josefina de Gyves Multidisciplinaria (Ciencias Naturales y Exactas) solid Titanium (IV) polysiloxanes phase extraction In this work the synthesis, characterization and evaluation of a novel sorbent material used for the solid-phase extraction of titanium (IV) from hydrochloric acid medium is described. The material was prepared by the sol-gel route incorporating bis(2-ethylhexylphosphoric acid) (D2EHPA) as extractant within a polymeric matrix based on polysiloxanes and characterized through FTIR-ATR, XRD, 29Si and 31P NMR, TGA and DSC. In studies of titanium sorption and desorption in batch mode several factors related with the extraction and back-extraction operations were evaluated, such as: contact time, titanium concentration, nature and composition of the aqueous media, and extractant concentration in the sorbent. The maximum sorption was observed at 30 min of contact time in a 1 mol L-1 HCl + 0.1% KCl medium, while the maximum desorption was observed at 60 min in a 1.5 mol L-1 H2SO4 + 20% v/v H2O2 medium when titanium concentration was 70 mg L-1. Under optimal conditions the recovered percent of titanium was nearly 90%. In addition, the characterization of the extraction equilibrium was performed. The selectivity of the method was studied adding Al(III), Fe(III) and V(V) to the extraction medium. A high selectivity for Ti over Al and Fe was observed, even at high concentrations of the interferents; 50% of Ti, only 7% of Fe, 3% of Al and less than 1% of V were recovered under the established conditions. The method was finally applied for titanium recovery from a certified fly ash sample generated from a municipal incineration plant. 2011 artículo científico 1870-249X https://www.redalyc.org/articulo.oa?id=47521133002 en http://www.redalyc.org/revista.oa?id=475 Journal of the Mexican Chemical Society application/pdf Sociedad Química de México Journal of the Mexican Chemical Society (México) Num.2 Vol.55 |
| title | Novel D2EHPA-polysiloxane-based Sorbent for Titanium (IV) Extraction and Separation |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) solid Titanium (IV) polysiloxanes phase extraction |
| url | https://www.redalyc.org/articulo.oa?id=47521133002 |