Pineapple crown delignification using low-cost ionic liquid based on ethanolamine and organic acids

Rita de C M Miranda; Jaci Vilanova Neta; Luiz Fernando Romanholo Ferreira; Walter Alves Gomes Júnior; Carina Soares do Nascimento; Edelvio de B Gomes; Silvana Mattedi; Cleide M F Soares; Álvaro S Lima

doi:10.1016/j.carbpol.2018.10.112

Pineapple crown delignification using low-cost ionic liquid based on ethanolamine and organic acids

Carbohydr Polym. 2019 Feb 15:206:302-308. doi: 10.1016/j.carbpol.2018.10.112. Epub 2018 Oct 31.

Authors

Rita de C M Miranda¹, Jaci Vilanova Neta², Luiz Fernando Romanholo Ferreira³, Walter Alves Gomes Júnior⁴, Carina Soares do Nascimento⁴, Edelvio de B Gomes⁴, Silvana Mattedi⁵, Cleide M F Soares³, Álvaro S Lima⁶

Affiliations

¹ UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, SE, Brazil; Uniceuma, Mestrado em Meio Ambiente, Renascença, 65075-120, São Luís, MA, Brazil.
² UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, SE, Brazil.
³ UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, SE, Brazil; ITP, Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, 300-Prédio do ITP, Farolândia, 49032-490, Aracaju, SE, Brazil.
⁴ IFBA, Instituto Federal da Bahia, Campus Salvador, Departamento de Tecnologia em Saúde e Biologia, Rua Emídio dos Santos, s/n - Barbalho, 40301-015, Salvador, BA, Brazil.
⁵ UFBA, Universidade Federal da Bahia, Escola Politécnica, Departamento de Engenharia, Rua Aristides Novis 2, Federação, 40210-630, Salvador, BA, Brazil.
⁶ UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, SE, Brazil; ITP, Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, 300-Prédio do ITP, Farolândia, 49032-490, Aracaju, SE, Brazil. Electronic address: aslima2001@yahoo.com.br.

PMID: 30553326
DOI: 10.1016/j.carbpol.2018.10.112

Abstract

Pineapple fibre was treated with protic ionic liquids (PILs) and the effects on the structure, composition, and properties of the fibres were evaluated. Treatment with PILs efficiently exposed the fibre surface, as confirmed by scanning electron microscopy. The chemical composition analysis revealed reductions in the lignin and hemicellulose contents in the treated fibres, promoting exposure of cellulose. The results correlated with the crystallinity index, which was greater in the treated fibres compared with that in the untreated fibres. The generated residue from the treatment of fibres with PIL (1%, v/v) showed lower levels of toxic compounds, demonstrating the advantages of this treatment over conventional biomass treatments.

Keywords: Biomass; Ionic liquid; Lignocellulose; Pineapple; Treatment.