Extracção da lignina da serradura de tronco de coqueiro para produção de celulose pelo método de soda cáustica: caracterização e avaliação do impacto ambiental

Abstract

The present work aimed to extract lignin to produce cellulose through of the Soda pulping process on coconut tree trunk sawdust with a view to applies it for ecological purposes in the generation of materials that are easy to biodegrade. About 110 g of residue with a particle size between 2 - 4 mm and humidity between 4.73 – 6.18% were weighed to extract lignin at a temperature of 160 oC. The sample was also evaluated in relation to physicochemical parameters. In each pulping, the same percentages of liquor were used, and the results obtained showed that cellulose yield and lignin content varied from 34.42 – 29.40% and 46.34 – 38.08%, with an average of 31.29% ± 0.68 and 42.13 ± 0.99% for cellulose and lignin, respectively. There were no significant differences regarding the content of cellulose obtained in the material studied in comparison with the levels achieved by some authors in different biomasses of plant origin, which allows us to conclude that the residues selected in the present work are excellent biomass precursors for cellulose production ( TRADUÇÃO NOSSA).