Fractionation of green coconut fiber using sequential hydrothermal/alkaline pretreatments and amberlite XAD-7HP resin
| Author | Souza, Domingos Fabiano de Santana; Padilha, Carlos Eduardo de Araújo; Nogueira, Cleitiane da Costa; Oliveira Filho, Marcos Antônio; Sousa Júnior, Francisco Canindé de; Assis, Cristiane Fernandes de; Oliveira, Jackson Araújo de; Santos, Everaldo Silvino dos | |
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| Publisher | Elsevier | |
| Date | 2019-12 | |
| Keywords | Alkaline pretreatment Ethanol production Phenolic compounds Lignin recovery Arabinoxylan recovery Methylene blue dye | |
| Citation | ||
| Abstract | The 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 | |
| URI | https://repositorio.ufrn.br/handle/123456789/45164 | |
| Collections | CT - DEQ - Artigos publicados em periódicos |
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