Robust hydrophobic ceramic membrane for high-salinity wastewater separation via membrane distillation

Miao, Kai; Song, Yuqi; Guan, Kecheng; Liu, Jinxin; Matsuyama, Hideto; Zou, Dong; Zhong, Zhaoxiang

doi:10.1016/j.desal.2024.118091

Desalination

2024

DOI: 10.1016/j.desal.2024.118091

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Robust hydrophobic ceramic membrane for high-salinity wastewater separation via membrane distillation

Kai Miao,

Yuqi Song,

Kecheng Guan

et al.

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A Novel Delayed Phase Inversion Strategy Enables Green PVDF Membranes for Membrane Distillation

Sun,

Xia,

Luo

et al. 2024

Membranes

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Polyvinylidene fluoride (PVDF) membranes are extensively utilized in membrane distillation (MD) for water treatment. However, traditional methods easily form asymmetrical membranes with dense skin layers that are detrimental to membrane flux. Herein, an eco-friendly PVDF membrane was fabricated by utilizing a delayed phase separation process without using any pore-forming agents. In addition, methyl-5-(dimethylamino)-2-methyl-5-oxopentanoate (PolarClean) was used as a green solvent without posing risks to humans and the environment. It was demonstrated that the PVDF concentration is crucial in influencing the microstructures and performance of the resulting membranes. As the PVDF concentration increased, the morphology changed significantly, resulting in a reduction of pore size. When feeding the device with NaCl solution at a concentration of 35 g/L, the MD water vapor flux reached 18.49 kg·m⁻2·h⁻1, while maintaining a salt rejection of over 99.97% during the continuous operation for 24 h. This work presented a method for producing green PVDF membranes via delayed phase inversion with satisfactory water vapor flux and salt rejection, highlighting their prospect for effective applications in MD for water treatment.

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A Novel Delayed Phase Inversion Strategy Enables Green PVDF Membranes for Membrane Distillation

Sun,

Xia,

Luo

et al. 2024

Membranes

View full text Add to dashboard Cite

show abstract

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Robust hydrophobic ceramic membrane for high-salinity wastewater separation via membrane distillation

Cited by 1 publication

References 61 publications

A Novel Delayed Phase Inversion Strategy Enables Green PVDF Membranes for Membrane Distillation

A Novel Delayed Phase Inversion Strategy Enables Green PVDF Membranes for Membrane Distillation

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