Application of cationic hemicelluloses produced from corn husk as polyelectrolytes in sewage treatment

• Autor(a) principal: Landim,Alan Soares
• Data de Publicação: 2013
• Outros Autores: Rodrigues Filho,Guimes, Sousa,Raquel Maria Ferreira, Ribeiro,Elaine Angélica Mundim, Souza,Fúlvio Rafael Bento de, Vieira,Júlia Graciele, Assunção,Rosana Maria Nascimento de, Cerqueira,Daniel Alves
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Polímeros (São Carlos. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282013000400007
• topic: Cationic hemicelluloses; corn husk; flotation; sewage treatment

Hemicelluloses were extracted from corn husk and converted into cationic hemicelluloses using 2,3-epoxypropyltrimethylammonium chloride. The degree of substitution was determined as 0.43 from results of elemental analysis. The cationic derivative was also characterized by Fourier transform infrared spectroscopy and Carbon-13 magnetic nuclear ressonance. The produced polymer was employed as coagulant aid in a sewage treatment station (STS) of the municipal department of water and sewer (Departamento Municipal de Água e Esgoto - DMAE) in Uberlândia-Minas Gerais, Brazil, using Jar test experiments. Its performance was compared to ACRIPOL C10, a commercial cationic polyacrylamide regularly used as a coagulant at the STS. The best result of the jar-test essays was obtained when using cationic hemicelluloses (10 mg L- 1) as coagulant aid and ferric chloride as coagulante (200 mg L- 1). The resultsof color and turbidity reduction, 37 and 39%, respectively, were better than when using only ferric chloride. These results were also higher than those of commercial polyacrylamide, on the order of 32.4 and 38.7%, respectively. The results showed that the cationic hemicelluloses presented similar or even superior performance when compared to ACRIPOL C10, demonstrating that the polyelectrolytes produced from recycled corn husks can replace commercial polymers in sewage treatment stations.