Effect of Alkalinity on Catalytic Activity of Iron-Manganese Co-Oxide in Removing Ammonium and Manganese: Performance and Mechanism.

In this study, a pilot-scale experimental filter system was used to investigate the effect of bicarbonate alkalinity on the activity of an Fe-Mn co-oxide for ammonium and manganese removal from surface water. The results showed that an increase in alkalinity to 150 mg/L (calculated as CaCO) by the addition of NaHCO significantly promoted the activity of the Fe-Mn co-oxide. The ammonium and manganese removal efficiencies of the Fe-Mn co-oxide increased from 40% to 95% and 85% to 100%, respectively.