WEI Chun-zhong,ZENG Si,LI Dong-dong,et al.Heat and Mass Transfer Mechanism and Membrane Fouling Characteristics of GO-PVP/PVDF Permeable Membrane[J].China Water & Wastewater,2023,39(5):80-87.
Heat and Mass Transfer Mechanism and Membrane Fouling Characteristics of GO-PVP/PVDF Permeable Membrane
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第5期
Page:
80-87
Column:
Date of publication:
2023-03-01
- Keywords:
- permeable membrane; graphene oxide; heat and mass transfer; hydrophobicity; membrane fouling; molecular simulation
- Abstract:
- Low permeability and poor hydrophobicity are the key factors limiting the application of permeable membranes in the field of seawater desalination. To improve the hydrophobicity and maintain a high permeability of the membrane, the molecular simulation of heat and mass transfer and pollution [pollutants were humic acid (HA), L-cysteine (LC) and Ca2+] resistance experiment of the prepared graphene oxide-polyvinylpyrrolidone/polyvinylidene fluoride (GO-PVP/PVDF) composite membrane were carried out. Then, the heat and mass transfer model of the membrane was established by using Materials Studio (MS) software. The higher content of GO resulted in the less cracks on the membrane surface. The permeability and thermal conductivity of the composite membrane with the left and right stacking mode was the best, while the performance of the composite membrane with the top and bottom stacking mode was the worst. The hydrogen bonding energy (Eel) was negative, which resulted in negative interaction energy between pollutants and the membrane surface, and was the main force for pollutant enrichment on the membrane surface. Furthermore, the addition of Ca2+ aggravated the membrane fouling.
Last Update:
2023-03-01