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| Titel: |
Evaluación de un electrodo de carbón vítreo modificado con Zeolita tipo “A” en la adsorción de 2-clorofenol |
| Auteur: |
Aurora Molina Carlos Villavicencio Lenys Fernández |
| Verschenen in: |
Avances en Química |
| Paginering: | Jaargang 4 (2009) nr. 2 pagina's 63-72 |
| Jaar: |
2009 |
| Inhoud: |
Glassy carbon electrodes modified with Zeolite “A” were studied in order to evidence the adsorption of 2-chlorophenol. Synthesis of zeolite was undertaken by a hydrothermal method using calcined kaolin as raw material. The zeolite was first exchanged with calcium ions. Then, it was modified with the cationic surfactant CTAB (cetyl trimethyl ammonium bromide) or the non-ionic surfactant Triton X-100 (t-octylphenoxy-polyethoxyethanol). Adsorption of 2-chlorophenol was evaluated by cyclic voltammetry, once it was adsorbed onto the modified electrode. Electrochemical results indicated that the films surfactant-zeolites were able to adsorb the 2-chlorophenol from an aqueous alkaline medium. The best results were achieved when the cationic surfactant CTAB was used. The importance of electrode surface cleaning to guarantee the complete adherence between the vitreous carbon and the modified surfactant zeolite was determinated. Polishing and cleaning processes depend on the type of surfactant used. |
| Uitgever: |
Universidad de Los Andes (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 5 gevonden artikelen
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