The potential of direct contact membrane distillation for industrial textile wastewater treatment using PVDF-Cloisite 15A nanocomposite membrane

Mokhtar, Nadzirah Mohd; Lau, Woei Jye; Ismail, Ahmad Fauzi; Kartohardjono, Sutrasno; Lai, Soon Onn; Teoh, H.C.

doi:10.1016/j.cherd.2016.05.018

Cited by 68 publications

(23 citation statements)

References 46 publications

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“…This phenomenon was similar to the one previously reported . Mokhtar et al have confirmed the physicochemical interactions between foulants and membrane material that may lead to membrane fouling and pore wetting during the MD process. Comparing CR and MB, the electric repulsive force could be induced between CR as an anionic dye and the negatively charged PVDF membrane surface in an aqueous solution (Figure ) .…”

Section: Resultssupporting

confidence: 90%

“…The direct discharge of dyeing wastewater into the ecological environment without any treatment causes severe environmental pollution problems. Currently, biotechnology and physicochemical methods are commonly used for dyeing wastewater treatment . Among the physicochemical technologies, advanced oxidation technologies, such as activated persulphate oxidation, have been developed and successfully used for the degradation of colorants .…”

Section: Introductionmentioning

confidence: 99%

“…Currently, biotechnology and physicochemical methods are commonly used for dyeing wastewater treatment. 2,3 Among the physicochemical technologies, advanced oxidation technologies, such as activated persulphate oxidation, have been developed and successfully used for the degradation of colorants. [4][5][6][7][8] Compared with physicochemical methods, biotechnology is more efficient for organic pollutant reduction, providing a better developed application in the treatment of textile dyeing wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Dye removal using hydrophobic polyvinylidene fluoride hollow fibre composite membrane by vacuum membrane distillation

Feng

Shi

et al. 2019

Coloration Technology

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Hydrophobic polyvinylidene fluoride (PVDF) hollow fibre composite membranes were prepared by the dilute solution coating process to build a special surface structure that was similar to the dual micro‐nano structure on the lotus leaf. Poly(vinylidene fluoride‐co‐hexafluoropropene) was chosen as the hydrophobic polymer candidate in dilute solution. Membrane morphology and surface hydrophobicity were evaluated by scanning electron microscopy and dynamic water contact angle measurement. The prepared PVDF hollow fibre membranes were employed to separate dyes (Congo Red and Methylene Blue) from water by vacuum membrane distillation. The effects of operational conditions (feed temperature, vacuum pressure and feed flow rate) on the vacuum membrane distillation performance of different PVDF membranes were investigated. The results indicated that the water contact angle values of PVDF composite membrane surfaces improved from 93.6° to 130.8°, which was mainly attributed to the formation of micro‐nano rods. This structure was similar to the dual micro‐nano structure on the lotus leaf. Under test feed temperature, vacuum pressure and feed flow rate conditions, the dye rejection rate of Congo Red and Methylene Blue by the hydrophobic PVDF hollow fibre membrane remained above 99.5% and 99%, which was higher than that of the pristine PVDF membrane (99% and 98%, respectively). In addition, the hydrophobic PVDF hollow fibre composite membrane showed higher permeation flux under different conditions compared with the pristine PVDF membrane, which was attributed to membrane surface hydrophobicity and the electrostatic interactions between dyes and the PVDF membrane surface.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dye removal using hydrophobic polyvinylidene fluoride hollow fibre composite membrane by vacuum membrane distillation

Feng

Shi

et al. 2019

Coloration Technology

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“…No entanto, poucos estudos abordam tal aplicação sendo ainda incipientes os resultados obtidos. (Mokhtar et al, 2016). Dessa forma, o objetivo deste trabalho foi avaliar a recuperação de águas residuais com corantes dispersos aplicando-se o processo de separação de destilação por membranas.…”

Section: Ufscar -São Carlos -Sp 16 a 19 De Julho De 2017unclassified

Tratamento De Águas Residuais Com Corante Disperso Da Indústria Têxtil Utilizando Destilação Por Membranas

Correa¹,

Ramlow²,

Valle³

et al. 2017

Blucher Chemical Engineering Proceedings

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RESUMO -Estudos contemplando o processo de Destilação por Membranas (DM) têm-se desenvolvido nos últimos anos devido à sua utilização eficiente na recuperação de água com possibilidade de reuso. Neste trabalho, investigou-se a aplicabilidade do processo de DM no tratamento de efluente têxtil contendo corantes dispersos. Duas soluções de corante, nas cores preto e vermelho, com 30 mg•L¯¹ cada foram utilizadas como padrão para representar o efluente. A membrana utilizada neste trabalho foi uma comercial plana de poliamida. Os resultados mostraram que os valores médios de fluxo permeado e de recuperação de corante foram respectivamente 29,3 kg•(m¯²•h¯¹) e 5,91% para o corante preto disperso e de 14,16 kg•(m¯²•h¯¹) e 7,10% para o corante vermelho disperso, demonstrando a possibilidade de aplicação deste tratamento em águas residuais da indústria têxtil. INTRODUÇÃOUm dos maiores desafios mundiais atuais consiste na escassez de água. Este aspecto é extremamente relevante no setor têxtil, devido à grande quantidade necessária de água para atender a demanda de produção e ao aumento da rigorosidade das leis ambientais. Desse modo, tem-se buscado cada vez mais fontes renováveis deste insumo para que a produção industrial caminhe em paralelo com a sustentabilidade ambiental, tornando-se então a busca por alternativas de reuso de água uma área de estudo para os pesquisadores.A destilação por membranas (DM) é um processo de separação conduzido termicamente no qual apenas moléculas de vapor transferem-se através de uma membrana hidrofóbica porosa do lado de alimentação/retentado e são coletadas, após condensação, no lado permeado/destilado (Alkhudhiri et al., 2011). Isto é, uma diferença de temperatura através das superfícies da membrana induz a diferença de pressão de vapor em ambos os lados. Durante o processo de separação, a fase vapor é mantida dentro dos poros da membrana (Mozia et al., 2009). A natureza da força motriz e a característica hidro-repelente da membrana rejeitam teoricamente 100% dos solutos não voláteis, como macromoléculas, espécies coloidais, íons inorgânicos e outros compostos não voláteis (Drioli et al., 2014).

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“…DCMD is an interesting method to treat dyeing wastewater. In addition to water recovery, it can exploit the free energy given by hot wastewater discharged by dyeing and requires significantly lower energy consumption during operation . The application of DCMD to dyeing wastewater is related to integration of water management, wastewater treatment, and water reuse.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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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The potential of direct contact membrane distillation for industrial textile wastewater treatment using PVDF-Cloisite 15A nanocomposite membrane

Cited by 68 publications

References 46 publications

Dye removal using hydrophobic polyvinylidene fluoride hollow fibre composite membrane by vacuum membrane distillation

Dye removal using hydrophobic polyvinylidene fluoride hollow fibre composite membrane by vacuum membrane distillation

Tratamento De Águas Residuais Com Corante Disperso Da Indústria Têxtil Utilizando Destilação Por Membranas

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

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