ADSORÇÃO DO CORANTE TÊXTIL AZUL REMAZOL POR PECÍOLO DE BURITI (Mauritia flexuosa L.f.)* ADSORPTION OF BLUE TEXTILE DYE REMAZOL FOR BURITI PETIOLE (Mauritia flexuosa Lf) ADSORCIÓN DEL COLORANTE TEXTIL AZUL REMAZOL POR EL PECÍOLO DE BURITI (Mauritia flexuosa L.f.)

In the present study was investigated the removal of Remazol Blue dye using as adsorbent buriti petiole. From the IR spectrum. the main functional groups of the adsorbent were identified. The wavelength of maximum absorption (λ max ) of the dye was obtained by spectrophotometric in the UV-visible was 595 nm. The pH at the point of zero charge of the adsorbent was estimated graphically at 4,6. Were investigated Some parameters were investigated such as: the influence of pH, the contact time and the concentration of the dye. The adsorption capacity of the dye is higher in lower pH's. The adsorption kinetic models that showed the best fits were the pseudo-second order for the lower concentration (R2 ≈ 93%) and Elovich for concentrations of 400 and 800 mg.L -1 (R2 ≈ 97%). The isotherm models used were those of Freundlich, Sips and Multilayer. Sips and Multilayer models were best fitted the equilibrium data (R2 > 96%). The maxi - mum amount adsorbed estimated by Sips model was 33 mg.g -1 . That relatively high adsorption capacity