Lignina proveniente da produção de papel e celulose aplicada como floculante no tratamento de efluentes

• Autor(a) principal: Farias, Fernanda Vieira de [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/156145; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-02-22/000890929.pdf
• topic: Engenharia ambiental; Lignina; Papel - Industria; Industria de celulose; Floculação; Efluente - Qualidade; Corantes

The pulp and paper production has increased last years and it is directly involved with quality life. The relationship between paper quality and lignin amount is inversely proportional, with abusive use of chemicals responsible for fiber whitening and lignin removal. This generates a large-scale production of this compound which is one of the most abundant on the planet, and in this context, many studies have been directed at creating alternatives for its use, from its application as resins and adhesives, even in the production of energy as reaction fuel. In this paper, we present the flocculant potential of lignin samples with ionic charges equal to +0,33, +0,54, +1,21 and +1,36 mEq / g, from the kraft production process, comparing their efficiency through two methods: turbidity analysis in pH 5, 7 and 9 and different dosages of lignin (0, 2, 4, 8, 12 and 16 mL of lignin solution); and dye removal with the use of reactive black 5 at different dosages of lignin (0; 0,5; 1,0; 1,5; 2,0; 2,5; 3,0; 3,5; 4,0; 4,5 e 5,0 mL). The higher charged sample (+1,36 mEq / g) removed a larger percentage of dye (approximately 62%) compared to lower charged lignin, and at pH 9 the lowest relative turbidity value was approximately 0,24 V