SciELO - Scientific Electronic Library Online

 
vol.24 número3Un estudio de la gestión de inventarios en VenezuelaCopolimerización de etileno con 1-hexeno mediante complejos TpTiCl2 (OR) índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • No hay articulos similaresSimilares en SciELO

Compartir


Revista de la Facultad de Ingeniería Universidad Central de Venezuela

versión impresa ISSN 0798-4065

Resumen

VILLAVICENCIO, Carlos; MOLINA, Aurora  y  FERNANDEZ, Lenys. Study of anion adsorption on modified synthetic zeolites with surfactant. Rev. Fac. Ing. UCV [online]. 2009, vol.24, n.3, pp.95-107. ISSN 0798-4065.

This work concerns the study of the synthesis of zeolites under hydrothermal conditions in an alkaline medium, using, as raw material, kaolin previously selected from various aluminosilicates from Venezuela and which was heated for 1.5 hours at a temperature of 700°C. The optimization of the synthesis was conducted by varying parameters such as concentration of NaOH 2.0 M, temperature and time of crystallization at 90°C for 3 hours. For purposes of comparison, we carried out the synthesis of pure zeolite A, according to the procedure of the International Association of Zeolites (IZA). All products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), elemental chemical analysis by emission spectroscopy (ICP-AES) and infrared spectroscopy (FT-IR). On the other hand, the applications of zeolite films synthesized in these conditions saturated with calcium and modified by surfactants named cetyltrimethylamonium bromide (CTAB) and non-ionic named Triton X-100, for the subsequent modification of the glassy carbon electrode surface (GC) in the detection by oxidation of phenolic compounds, by cyclic voltammetry, showed improvements in the voltammetric response to pH 9.2 and 9.6 compared with that of the unaltered glassy carbon, attributed to the effects of the surfactants and pH on the surface of the zeolite

Palabras clave : Zeolite; Kaolin; Synthesis; Hydrothermal treatment; Surface modification; Surfactant; Zeolite modified electrodes; Cyclic voltammetry; Detection; Electrochemical sensing.

        · resumen en Español     · texto en Español