Síntese de compósito de carbono a partir de resíduo de vitivinicultura para adsorção de contaminantes emergentes

• Ano de defesa: 2022
• Autor(a) principal: Silva, Nathália Favarin da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Engenharia Química; UFSM; Programa de Pós-Graduação em Engenharia Química; Centro de Tecnologia
• Palavras-chave em Português: Adsorção; Ativação química; Resíduos agroindustriais; Adsorption; Chemical activation; Agro-industrial residues; CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/24471

This work proposed the synthesis of a carbon composite (CC) chemically activated with ZnCl2. This CC was obtained from the pyrolysis of composted viticulture residue. The material was characterized by FT-IR (Fourier transform infrared spectroscopy), XRD (X-ray diffraction), SEM (scanning electron microscopy), TGA (thermogravimetric analysis), and DSC (differential scanning calorimetry) techniques, BET/BJH, pHpzc (zero charge point) and Boehm titration. The characterization results showed that the material has a morphology favorable to the adsorption process, with structure adjusted by pores of different sizes. CC was tested for its ability to adsorb two emerging contaminants: 2-nitrophenol and ketoprofen. The maximum removal obtained was 81.4% and 94% for 2-nitrophenol and ketoprofen, respectively. The general order kinetic model predicted the experimental curves for both regarding the kinetics. Furthermore, the Sips model best described the equilibrium data for the two contaminants, with maximum adsorption capacities of 376.0 and 119.6 mg g-1 for 2-nitrophenol and ketoprofen, respectively. Therefore, the adsorbent synthesized from by-products of grape processing appears as a promising alternative for removing both evaluated contaminants from aqueous matrices.