Tratamento de efluente têxtil por adsorção com carvão de resíduo de madeira obtido em gaseificador

Abstract

The challenges of sustainable population growth are the environmental control of the immense amounts of waste generated every day and the use of resources for the production of inputs. Among all the resources, it can be said that water is the most used, appearing in the totalities of production processes. In the Agreste region of the state of Pernambuco, one of the largest textile hubs in Brazil is located. Despite the positive impact generated by this pole, a negative impact on the environmental sector must be considered, since, due to this contribution, the hydrographic basin that supplies this region is one of the most contaminated. The present work aimed to show the use of wood residues for the production of charcoal, by means of an energy gasifier, for later use in the treatment of effluents from a textile laundry. The charcoal produced was characterized (BET, MEV, TGA, DTG, FT-IR, DRX and PCZ) as well as the laundry effluent (pH; Color; Conductivity; Turbidity, Total Solids, COD, DBO). 2² factorial planning was carried out in order to choose the best coal, comparing it with commercial coal, through kinetic and equilibrium studies. The CA material can be said to be the best coal, because in its production process the gasifier has the capacity to generate a greater amount of energy and its structure is more uniform. Although its surface area is smaller than that of the CB material, the pore diameter is larger, which can generate compensation. Kinetic studies indicated a time of 90 minutes to reach equilibrium. The results were very promising for waste coals, with removal percentage above 96%, similar to that of commercial coal, also showing high adsorptive capacity.