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Congo red dye removal by direct membrane distillation using PVDF/PTFE membrane

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Abstract
The ability to use the membrane distillation (MD) technique is envisaged as a promising approach to attain sustainable and reliable clean water supply. In this work, polytetrafluoroethylene/polyvinylidene fluoride (PVDF/PTFE) flat sheet membranes were fabricated via the thermally induced solvent evaporation process. The PVDF/PTFE membrane surface was modified by incorporating methyl functionalized mesoporous silica nano particles (MfSNPs). Prior to application, the membranes were characterized with respect to surface and structural morphology, hydrophobicity and overall porosity. Clean water flux measurements were conducted using a direct contact membrane distillation (DCMD) lab-scale experimental setup with deionized water as the feed solution (50 degrees C) and permeate solution (20 degrees C). The highest stable pure water flux for the MfSNPS/PVDF/PTFE membranes was 0.0041 L/h m(2). The incorporation of the MfNPS did not only improve the fluxes but also induced low wetting properties as shown by the contact angle and LEPw values. The MfSNPs/PVDF/PTFE membranes were highly efficient in removing Congo red dye from water with 99% removal efficiency achieved.
Keywords
Congo red dye, Methyl functionalized silica nanoparticles, PVDF/PTFE nanocomposite membranes, Direct contact membrane distillation, WATER DESALINATION, CERAMIC MEMBRANES, PERFORMANCE, RECOVERY, SILICA

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MLA
Khumalo, NP et al. “Congo Red Dye Removal by Direct Membrane Distillation Using PVDF/PTFE Membrane.” SEPARATION AND PURIFICATION TECHNOLOGY 211 (2019): 578–586. Print.
APA
Khumalo, NP, Nthunya, L., De Canck, E., Derese, S., Verliefde, A., Kuvarega, A., Mamba, B., et al. (2019). Congo red dye removal by direct membrane distillation using PVDF/PTFE membrane. SEPARATION AND PURIFICATION TECHNOLOGY, 211, 578–586.
Chicago author-date
Khumalo, NP, Lebea Nthunya, Els De Canck, Sebastiaan Derese, Arne Verliefde, AT Kuvarega, BB Mamba, SD Mhlanga, and DS Dlamini. 2019. “Congo Red Dye Removal by Direct Membrane Distillation Using PVDF/PTFE Membrane.” Separation and Purification Technology 211: 578–586.
Chicago author-date (all authors)
Khumalo, NP, Lebea Nthunya, Els De Canck, Sebastiaan Derese, Arne Verliefde, AT Kuvarega, BB Mamba, SD Mhlanga, and DS Dlamini. 2019. “Congo Red Dye Removal by Direct Membrane Distillation Using PVDF/PTFE Membrane.” Separation and Purification Technology 211: 578–586.
Vancouver
1.
Khumalo N, Nthunya L, De Canck E, Derese S, Verliefde A, Kuvarega A, et al. Congo red dye removal by direct membrane distillation using PVDF/PTFE membrane. SEPARATION AND PURIFICATION TECHNOLOGY. 2019;211:578–86.
IEEE
[1]
N. Khumalo et al., “Congo red dye removal by direct membrane distillation using PVDF/PTFE membrane,” SEPARATION AND PURIFICATION TECHNOLOGY, vol. 211, pp. 578–586, 2019.
@article{8598606,
  abstract     = {The ability to use the membrane distillation (MD) technique is envisaged as a promising approach to attain sustainable and reliable clean water supply. In this work, polytetrafluoroethylene/polyvinylidene fluoride (PVDF/PTFE) flat sheet membranes were fabricated via the thermally induced solvent evaporation process. The PVDF/PTFE membrane surface was modified by incorporating methyl functionalized mesoporous silica nano particles (MfSNPs). Prior to application, the membranes were characterized with respect to surface and structural morphology, hydrophobicity and overall porosity. Clean water flux measurements were conducted using a direct contact membrane distillation (DCMD) lab-scale experimental setup with deionized water as the feed solution (50 degrees C) and permeate solution (20 degrees C). The highest stable pure water flux for the MfSNPS/PVDF/PTFE membranes was 0.0041 L/h m(2). The incorporation of the MfNPS did not only improve the fluxes but also induced low wetting properties as shown by the contact angle and LEPw values. The MfSNPs/PVDF/PTFE membranes were highly efficient in removing Congo red dye from water with 99% removal efficiency achieved.},
  author       = {Khumalo, NP and Nthunya, Lebea and De Canck, Els and Derese, Sebastiaan and Verliefde, Arne and Kuvarega, AT and Mamba, BB and Mhlanga, SD and Dlamini, DS},
  issn         = {1383-5866},
  journal      = {SEPARATION AND PURIFICATION TECHNOLOGY},
  keywords     = {Congo red dye,Methyl functionalized silica nanoparticles,PVDF/PTFE nanocomposite membranes,Direct contact membrane distillation,WATER DESALINATION,CERAMIC MEMBRANES,PERFORMANCE,RECOVERY,SILICA},
  language     = {eng},
  pages        = {578--586},
  title        = {Congo red dye removal by direct membrane distillation using PVDF/PTFE membrane},
  url          = {http://dx.doi.org/10.1016/j.seppur.2018.10.039},
  volume       = {211},
  year         = {2019},
}

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