Caracterização e aplicação de carvão ativado produzido a partir de resíduos de indústrias madeireiras

Abstract

The textile sector has great relevance in the Brazilian socioeconomic context, generating large volumes of effluents and of varied composition, with dyes and metals as the most worrying contaminants due to their characteristics of high solubility, harmfulness and low degradability. Environmental impacts as well as industrial waste are addressed by the United Nations (UN) Sustainable Development Goals (SDGs), which included them in the 2030 Agenda, more specifically in goal 12, which aims to ensure consumption and production standards sustainable by 2030, substantially reduce waste generation through prevention, reduction, recycling and reuse, using the circular economy concept that proposes that resources extracted from nature maintain high circularity in production processes in order to extract the maximum of its value and utility, with the intention of eliminating the concept of waste and creating a cyclical flow of resources. Within this context, activated carbon is widely used in the treatment of effluents, via adsorption to remove contaminants, such as dyes. Activated carbon can be produced from the residue of biomass burning in boilers, which has a high content of unburned material with a carbonaceous character, subject to activation. Thus, the general objective of this work was to characterize and evaluate the adsorption kinetics of Reafix Yellow B8G (ARB8G) by the boiler residue, as well as the activated carbon produced from it through physical activation. The methodology was based on the studies by Silva (2019) and on the characterization analyzes of the quality control of the Alphacarbo industry. The precursor material and activated charcoal were found to be very efficient in removing the dye, obtaining 13.59 mg.g-1 and 13.00 mg.g-1 of removal, respectively, and both demonstrated better in the adjusted kinetic model of pseudo-second order . From these results, and bearing in mind that boiler waste is an underutilized and low-cost material, it is concluded that this substance has significant potential to be applied as an alternative material in the production of activated carbon and later used in the treatment of effluents containing dyes.