Membrane-based Environmental & Sustainable Technology (MembEST) Group
Department of Civil Engineering, The University of Hong Kong
Rapid and effective
water purification
Electro-spinning Technique
The nanofibrous membrane is fabricated via an electro-spinning technique which utilizes electric force to spray polymer solution onto nanofibers to stretch their diameter into 10s to 100s nanometer. The nanofibers are then weaved into a nanofibrous membrane which can filter tiny substance. Based on different properties of target contaminants, the team fabricate nanofibers with different dimensions.
High Water Permeability
The membrane filter is easily operated via a gravity-driven filtration process.
Heavy Metals Removal
> 99%
The membrane can remove > 99% for lead (Pb), nickel (Ni), cadmium (Cd), and chromium (Cr).
Bacterial Removal
> 99.9999%
Bacteria such as E. coli and B. subtilis are almost totally removed in the process.
Reusability
The membrane can be reused after being rinsed in vinegar.
Regenerated water filter was tested by Pb for over 5-round reuse. The removal efficiency removal kept stable.
Filter Prototypes
Awards & Recognitions
