Fabrication of zeolite NaX-doped electrospun porous fiber membrane for simultaneous ammonium recovery and organic carbon enrichment

Abstract The effect of porosity on the humidification efficiency of countercurrent hollow fiber membrane humidification system was investigated by using numerical simulation method to study polypropylene (PP) porous fiber membrane material. Firstly, the correctness of the numerical model was verified by experiments, and then the influence of porous fiber membrane material on humidification efficiency was further explored by changing the porosity of the model. The simulation results show that the humidification capacity and efficiency of the humidification component increase with the increase of porosity. When the porosity is between 0.35-0.8, the humidification capacity and efficiency increase significantly. However, when the porosity is between 0.8-0.9, although the humidification amount and humidification efficiency value are high, the increment is not obvious, and the porosity of the fiber film is inversely proportional to the support strength of the film, and the larger the porosity is, the shorter the service life of the film material is. Therefore, it is suggested to design the porosity of polypropylene (PP) film material between 0.65 and 0.8. It can not only ensure the high humidification capacity and efficiency of the fiber membrane, but also prolong the service life of the membrane.

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Electrospun PVDF-Ag@AgCl Porous Fiber Membrane: Stable Anti-Foul and Antibacterial Surface

Surface Innovations ◽

10.1680/jsuin.20.00050 ◽

2020 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Ying Tian ◽

You Shu ◽

Xiaomin Zhang ◽

Sakil Mahmud ◽

Jin Zhu ◽

...

Keyword(s):

Fiber Membrane ◽

Porous Fiber ◽

Antibacterial Surface

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Preliminary Study on Dissolved and Colloidal Organic Carbon in Tidal Creek of Chongming Dongtan

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.317-319.2436 ◽

2011 ◽

Vol 317-319 ◽

pp. 2436-2439

Author(s):

Wen Dan Huang ◽

Xiang Min Zheng ◽

Li Min Zhou

Keyword(s):

Organic Carbon ◽

Pore Size ◽

Tidal Flat ◽

Water Samples ◽

Tidal Creek ◽

Fiber Membrane ◽

Tidal Creeks ◽

Membrane Pore ◽

Preliminary Study ◽

Membrane Pore Size

Water samples were collected in the northern, eastern and southern tidal creeks of Chongming Dongtan in January, 2009. The samples were passed through 0.45μm pore size GF/C glass fiber membrane and colloid was isolated by mini tangential flow ultrafiltration (TFF) with ultrafiltration membrane pore-size of 1kD (1kD=1 000 Daltons). Then the content of organic carbon was tested by TOC II. Results show that the contents of dissolved and colloidal organic carbon (DOC and COC) in the northern creek are higher than the eastern and southern tidal creeks of Chongming Dongtan, and the concentration of DOC decreased from high tidal flat to low tidal flat. Hydrodynamic and vegetation are the important factors to affect the content of COC in tidal creek water of Chongming Dongtan.

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Simulation of coupled transient heat and water vapor transfer in porous fiber membrane with different fiber orientations and porosity

Journal of Industrial Textiles ◽

10.1177/15280837211041772 ◽

2021 ◽

pp. 152808372110417

Author(s):

Haihong Gu ◽

Li Gao ◽

Guoqing Li ◽

Ni Li ◽

Jie Xiong

Keyword(s):

Heat Transfer ◽

Water Vapor ◽

Fiber Orientation ◽

3D Model ◽

Diffusion Flux ◽

Heat Convection ◽

Fiber Membrane ◽

Porous Fiber ◽

Vapor Transfer ◽

Water Vapor Transfer

The transfer process of heat and water vapor in a porous fiber membrane was investigated through the simulation of a 3D model for optimizing the configuration design. 3D models with different fiber orientations and porosity were constructed by the parameter input method, and the accuracy of the model was validated by the coefficient of determination (R2) between the apparent velocity of the model and the air permeability of the membrane. The permeability of 3D model was used to reflect the discrepancy in fiber orientation of the model. The influences of fiber orientation and porosity on heat and water vapor transfer were surveyed by the coupled physics of heat transfer and dilute substance transfer. Since there was no temperature difference in the entire domain, heat conduction (10−9 W/m2) and moisture convection (10−14 mol·m−2·s−1) were faint in the model. With the diffusion of water vapor in the moisture, the heat convection flux and water vapor diffusion flux gradually decreased and reached equilibrium. When the permeability was increased by adjusting the fiber orientation (from 1.002 to 1.200 m2), the heat convection flux and water vapor diffusion flux followed a similar growth pattern due to the coupling effect of heat transfer and water vapor transfer. The R2 for the heat convection flux and water vapor transmission rate of the simulations and experiments with different porosity (44.87, 47.64 and 50.15%) were 0.999 and 0.923, respectively, which demonstrated the validation of the simulation in heat and water vapor transfer.

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