Volume 42, Issue 5 pp. 1045-1052
Research Article

Direct Contact Membrane Distillation Applied to Colored Reactive or Disperse Dye Solutions

Heloisa Ramlow

Heloisa Ramlow

Federal University of Santa Catarina, Graduate Program in Chemical Engineering, Universitário Reitor João David Ferreira Lima Campus, 88040-900 Florianópolis, Brazil

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Carolina D'Ávila Kramer Cavalcanti

Carolina D'Ávila Kramer Cavalcanti

Federal University of Santa Catarina, Department of Engineering, Blumenau Campus, João Pessoa 2750, 89036-002 Blumenau, Brazil

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Ricardo Antonio Francisco Machado

Ricardo Antonio Francisco Machado

Federal University of Santa Catarina, Graduate Program in Chemical Engineering, Universitário Reitor João David Ferreira Lima Campus, 88040-900 Florianópolis, Brazil

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Andrea Cristiane Krause Bierhalz

Andrea Cristiane Krause Bierhalz

Federal University of Santa Catarina, Department of Engineering, Blumenau Campus, João Pessoa 2750, 89036-002 Blumenau, Brazil

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Cintia Marangoni

Corresponding Author

Cintia Marangoni

Federal University of Santa Catarina, Graduate Program in Chemical Engineering, Universitário Reitor João David Ferreira Lima Campus, 88040-900 Florianópolis, Brazil

Federal University of Santa Catarina, Department of Engineering, Blumenau Campus, João Pessoa 2750, 89036-002 Blumenau, Brazil

Correspondence: Cintia Marangoni ([email protected]), Federal University of Santa Catarina, Graduate Program in Chemical Engineering, Universitário Reitor João David Ferreira Lima Campus, 88040-900 Florianópolis, Santa Catarina, Brazil.Search for more papers by this author
First published: 25 February 2019
Citations: 19

Abstract

The influence of dye class and chromogen groups of dyeing wastewaters composed by reactive or disperse dyes with different colors on direct contact membrane distillation (DCMD) was investigated. The state-of-the-art shows that disperse dyes and different dye colors are not studied in DCMD and the application of DCMD for dyeing wastewater treatment is limited to a few publications. High color rejection was obtained and water was recovered at the permeate side for feed solutions containing reactive or disperse dye. Influence of chromogen groups (colors) was not observed, whereas the class dye was decisive for the process performance. Reactive dyes showed higher mean permeate flux due to the repulsion between their anionic groups and the negative surface of the membrane. Partial wetting of larger pores allowed the passage of small disperse dye molecules, reducing color rejection.

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