Novel D2EHPA-polysiloxane-based Sorbent for Titanium (IV) Extraction and Separation
Por:
Mendoza-Reyes L.G., de San Miguel, ER, Sánchez-Guerrero J.P., Pardo-Gaytán D.Y., de Gyves J.
Publicada:
1 abr 2011
Categoría:
Chemistry (miscellaneous)
Resumen:
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, (29)Si and (31)P 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) H(2)SO(4) + 20% v/v H(2)O(2) medium when titanium concentration was 70 mg L(-1). Under optimal conditions the rec
Filiaciones:
Mendoza-Reyes L.G.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Analit, Mexico City 04510, DF, Mexico
de San Miguel, ER:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Analit, Mexico City 04510, DF, Mexico
Sánchez-Guerrero J.P.:
Laboratorio de Evaluación Molecular, Instituto Mexicano del Petróleo, Eje Central Norte Lázaro Cárdenas 152, Apdo. Postal 14-805, 07730, México, DF, Mexico
Pardo-Gaytán D.Y.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Analit, Mexico City 04510, DF, Mexico
de Gyves J.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Analit, Mexico City 04510, DF, Mexico
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