Produção, caracterização e aplicação como agente adsorvente do biocarvão obtido a partir da Syagrus oleracea e Wodyetia bifurcata

Abstract

Brazil is a major producer of agricultural products, it has the potential to generate extraordinary biomass, and studies have been done on the potential of this raw material. The academic community has investigated the great adsorptive capacity of activated biochar as a direct agent in the removal of organic compounds from water bodies and the removal of contaminants present in effluents. The production of activated biochar from the endocarp of the species Syagrus oleracea (catolé) and Wodyetia bifurcata (rabo-de-raposa) with the use of the endocarp can be a useful proposal. In this way, the influence of the pyrolysis temperature (400, 500, 600 and 700ºC), granulometry (0.635<0.300mm, 0.300 <0.234mm and <0.234mm) and chemical activation was investigated from a finite bath system (H2SO4, H3PO4 and KOH) in the adsorption process of methylene blue solution. In the comparison of the biochars from each biomass, the biocarbon of Syagrus oleracea obtained a level of removal of methylene blue in the order of 98%, compared to 83% of the biochar of Wodyetia bifurcata. Characterization of the biochars by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) were performed. In addition to studies of kinetics (pseudo-first and pseudo-second order) and adsorption isotherm (Langmuir, Freundlich, Sips and Redlich-Peterson), it was revealed that both materials have an attractive adsorptive potential due to the physical-chemicals characteristics presents.