Produção Nacional
Revisado por pares
Fractionation of green coconut fiber using sequential hydrothermal/alkaline pretreatments and Amberlite XAD-7HP resin
2019; Elsevier BV; Volume: 7; Issue: 6 Linguagem: Inglês
10.1016/j.jece.2019.103474
ISSN2213-3437
AutoresCarlos Eduardo de Araújo Padilha, Cleitiane da Costa Nogueira, Marcos Antônio Oliveira Filho, Francisco Canindé de Sousa Júnior, Cristiane Fernandes de Assis, Domingos Fabiano de Santana Souza, Jackson Araújo de Oliveira, Everaldo Silvino dos Santos,
Tópico(s)Enzyme Catalysis and Immobilization
ResumoThe fractionation of agroindustrial and forest residues is a premise of the biorefinery concept. Thus, the present study focuses on pretreatments (hydrothermal and alkaline) and detoxification processes in order to transform green coconut fiber (GCF) into cellulose-rich material, dye biosorbent, bioactive phenolic compounds, lignin and arabinoxylan. The adsorption onto Amberlite XAD-7HP resin allowed the best recovery of phenolic compounds from hydrothermal pretreatment liquor, which presented potent antioxidant activities such as inhibition of hydroxyl and superoxide radicals of 77.05% and 76.88%, respectively. Acid precipitation was effective to recover 41.23% of the initial lignin content from alkaline pretreatment liquor. The detoxified hydrothermal pretreatment liquor was used as an additional source of glucose, increasing the final concentration of ethanol by 79.6% in simultaneous saccharification and fermentation of delignified GCF. Using delignified GCF as biosorbent, made it possible to obtain a static adsorption capacity of 200 mg of methylene blue dye per gram of biosorbent and good recyclability in dynamic experiments. Therefore, the proposed methodology guarantees a practical way of manufacturing value-added products from lignocellulosic materials.
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