Avaliação da influência do eletrólito NaCl e surfactante Profiber na adsorção do corante reativo azul 5G pelas escamas de peixe

• Autor(a) principal: Neves, Camila Vargas
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do UNIOESTE
• Texto Completo: http://tede.unioeste.br/handle/tede/3239
• topic: Adsorção; Eletrólitos; Escama de peixe; Corantes; Modelagem matemática; Modelos preditivos ; Adsorption; Eletrolyte; Fish scale; Dye; Mathematical modeling; ENGENHARIAS::ENGENHARIA QUIMICA

The textile industry are responsible to generate a large volume of wastewater that are characterized by high coloration, electrolytes (NaCl, Na2CO3, NaOH), surfactants, softeners, etc. Thus, these wastewaters require previous treatment to its disposal in the receiving bodies of water. The aim of this work was to evaluate the influence of electrolyte (NaCl) and surfactant (Profiber) in adsorption of reactive blue 5G dye by fish scale (Oreochromis niloticus). The adsorbent was characterizated by N2 physisorption. The initial pH (2; 3; 4; 5; 6; 7; 8; 9; 9,45) were elaluated for the systems: (i) RB5G-Adsorbent, (ii) RB5G-NaCl-Adsorbent, (iii) RB5G-Surfactant-Adsorbent e (iv) RB5G-NaCl-Surfactant-Adsorbent. The adsorption experiments were performed in closed and batch system (25°C). The effects of stirring speed (450, 700, 1000, 1400 rpm) and initial concentration (25, 50, 100, 150, 200 mg L-1) were evaluated in adsorption kinetics. The equilibrium data was determined based on kinetics tests. The kinetics data were modeled by external diffusion and adsorption in the adsorbent sites. The equilibrium data were modeling by Langmuir isotherm. The adsorbent characterization indicated that fish scale is a non-porous material. The best adsorption capacity occured in pH 2. The equilibrium was obtained in 72 hours. The effect best adsorption capacity occurred in 1000 rpm. The kinetics studies indicated that RB5G dye adsorption using fish scale was highly favorable. The kinetic data were best represented by adsorption in the adsorbent sites model. The electrolyte (NaCl) and surfactant (Profiber) the equilibrium adsorption in 10 and 7%, respectively. The maximum adsorption capacity were 272, 299 and 291 mg g-1 for the systems (i), (ii) and (iii), respectively. This work indicated that fish scale is a great adsorbent with high adsorption capacity. The presence of the electrolyte (NaCl) and surfactant (Profiber) influenced favorably the adsorption of the dye RB5G by fish scales.