KMnO4 pre-oxidation combined with FeCl3 coagulation for UF membrane fouling control

Journal
Desalination  
Volume
320
Start Page
40
End Page
48
Citation
Desalination (320): 40-48 (2013)
Publisher DOI
10.1016/j.desal.2013.04.017
Scopus ID
2-s2.0-84877798215
Publisher
Elsevier Science
KMnO4 pre-oxidation combined with FeCl3 coagulation for membrane fouling reduction was investigated during ultrafiltration (UF) of water samples from an impacted canal river. 0.5mg/L KMnO4 oxidation alone showed an obvious effect on the decrease of the total membrane fouling and fouling irreversibility, due to the removal of relevant organic membrane foulants such as biopolymers and humic acids. However, further increase of KMnO4 dosage to 1.0mg/L showed little enhancing effect on the reduction of membrane fouling. When coupled with FeCl3 coagulation at low dosage (1mg Fe/L), 0.5mg/L of KMnO4 pre-oxidation was able to further decrease the total fouling resistance in addition to the 1mg Fe/L coagulation, which can be attributed to the more effective removal of biopolymers from the water. However, no effect was observed for further reduction of irreversible fouling by the KMnO4 pre-oxidation. As the FeCl3 dosage was increased to 4mg Fe/L, it was shown that 0.5mg/L KMnO4 oxidation cannot further decrease the total fouling resistance; whereas the KMnO4 pre-oxidation exhibited a certain effect on the reduction of membrane fouling irreversibility. The results of this work may provide useful information for the application of combined KMnO4 oxidation and FeCl3 coagulation for UF membrane fouling control. © 2013 Elsevier B.V.
Subjects
FeCl coagulation 3
KMnO oxidation 4
Membrane fouling
Surface water
Ultrafiltration (UF)
DDC Class
620: Ingenieurwissenschaften
More Funding Information
Alexander von Humboldt-Stiftung
National Natural Science Foundation of China
Funds for National Creative Research Groups of China