The effect of citric acid on the catalytic oxidation of Mn(II) on ferrihydrite surface

Solutions for an efficient arsenite oxidation and removal from groundwater containing ferrous iron

“…The resulting solid was then washed with deionized water to remove K + and Clin excess (Ying et al, 2020). Two-line ferrihydrite (2L-Fh) was synthesized by adding under stirring a 2 M NaOH solution to a 500 mL solution containing 40 g Fe(NO3)3•9H2O, until the pH reached 7-8 (Zhang et al, 2022). After 2 h of equilibration time, the suspension was washed with deionized water and centrifuged (5×) to remove Na + and NO3in excess.…”