Simultaneous treatment of phosphorus and fluoride wastewater using acid-modified iron-loaded electrode capacitive deionization: Preparation and performance

Here, capacitive deionization technology (CDI) using modified activated carbon fiber felt (ACF) electrodes was proposed to provide a new strategy for the challenge of simultaneous phosphorus and fluoride wastewater treatment. The acid-modified iron-loaded ACF (A@Fe-ACF) obtained by modifying through two-step impregnation method. After modification, oxygen-containing functional groups on increased provided more adsorption sites. electron transfer efficiency A@Fe-ACF introducing Fe synergistically promoted fluorine. Results showed that removal efficiencies total (TP) fluorine (TF) in reached 89.4% 85% under optimal conditions (voltage intensity 1.5 V, pH 7, plate spacing 1 cm), while mechanism dominated chemical adsorption. Meanwhile, electrode has good recyclability stability after five cycles.