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Membrane Water Treatment
  Volume 10, Number 4, July 2019 , pages 299-305
DOI: https://doi.org/10.12989/mwt.2019.10.4.299
 


Iron and manganese removal in direct anoxic nanofiltration for indirect potable reuse
Yongxun Jin, Yeseul Choi, Kyung Guen Song, Soyoun Kim and Chanhyuk Park

 
Abstract
    Managed aquifer recharge (MAR) systems are gaining interest as an alternative to conventional water resources. However, when the water recovered in MAR systems, dissolved iron and manganese species may easily oxidize and they cause well screen clogging or require abandonment of extraction wells. In this study, both oxic and anoxic conditions were analyzed to verify the feasibility of the membrane filtration performance under various solution chemistries. The fouling mechanisms of the metal ions under anoxic conditions were also investigated by employing synthetic wastewater. The fouled membranes were then further analyzed to verify the major causes of inorganic fouling through SEM and XPS. The newly suggested anoxic process refining existing membrane process is expected to provide more precious information about nanofiltration (NF) membrane fouling, especially for demonstrating the potential advantages to chemical-free drinking water production for indirect potable reuse.
 
Key Words
    anoxic; managed aquifer recharge; nanofiltration; iron; indirect potable reuse
 
Address
Yongxun Jin, Yeseul Choi, Kyung Guen Song: Water Cycle Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
Yeseul Choi: School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, South Korea
Soyoun Kim and Chanhyuk Park: Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, South Korea
 

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