SERRAGEM DE EUCALIPTO E BAGAÇO DE CANA: ADSORVENTES NATURAIS PARA REMOÇÃO DE CORANTES RESIDUAIS DA INDÚSTRIA TÊXTIL

Abstract

One of the great challenges of the textile industry is the removal of the dye from the effluent from the production process for its subsequent proper disposal, without violating any current rules. The most widely used process today is adsorption, however some adsorbents are expensive. A viable solution is the use of natural adsorbents instead of synthetic ones due to its renewable source of obtaining, more accessible cost and easy acquisition. From previous studies it was found that sugarcane bagasse and eucalyptus sawdust would be adsorbents that could be used. Therefore, the batch adsorption process was simulated using a thermostatic bath with both adsorbs varying parameters, which are: contact time, pH and mass of the adsorbents. The most favorable result was using sugarcane bagasse as an adsorbent where, at pH 4, the mass of the adsorbent was 5 g and the exposure time was 60 minutes, it removed 24.06% of the dye. The process using eucalyptus sawdust was not viable, as it released color in the analyzed sample. The process with sugarcane bagasse is economically accessible, but the removal percentage was low.