Selectivity of Nanoporous MnO2 and TiO2 Membranes for Residual Contaminants in Treated Wastewater

Treated effluent from an electrically enhanced membrane bioreactor (eMBR) was filtered through MnO2 or TiO2 nanoporous membranes for the removal of residual heavy metals, bacteria, and biological oxygen demand (BOD). The fresh and spent membranes were characterized via energy‐dispersive X‐ray spectr...

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Bibliographic Details
Published in:Chemical engineering & technology 2018-02, Vol.41 (2), p.413-420
Main Authors: Giwa, Adewale, Jung, Sung M., Ahmed, Menatalla, Fang, Wenjing, Kong, Jing, Hasan, Shadi W.
Format: Article
Language:English
Subjects:
Bacteria
Bioreactors
Contaminants
Electrically enhanced membrane bioreactor
Heavy metal removal
Heavy metals
Manganese dioxide
Membranes
Nanoporous membranes
Oxygen demand
Spectrophotometry
Thermogravimetric analysis
Titanium dioxide
Titanium oxides
Wastewater treatment
Water analysis
Zeta potential
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Summary:Treated effluent from an electrically enhanced membrane bioreactor (eMBR) was filtered through MnO2 or TiO2 nanoporous membranes for the removal of residual heavy metals, bacteria, and biological oxygen demand (BOD). The fresh and spent membranes were characterized via energy‐dispersive X‐ray spectroscopy (EDAX), zeta potential analysis, and thermogravimetric analysis (TGA). Water analysis was performed by means of UV/Vis spectrophotometry. For most contaminants, eMBR‐TiO2 showed highest removal efficiency compared to MnO2 because of the combined adhesion and photocatalytic effects of TiO2. Meanwhile, eMBR‐MnO2 provided higher removal efficiency for Fe. Nanoporous MnO2 and TiO2 membranes in combination with a low‐voltage electrically enhanced membrane bioreactor were applied for the removal of residual contaminants from treated wastewater effluent. Such membranes contain ultralong 1D nanowires and nanoporous channels. The MnO2 and TiO2 nanowires have chemical functionalities for membrane separation and photocatalytic ability.
ISSN:0930-7516
1521-4125
DOI:10.1002/ceat.201700376