Effects of Co-Existing Anions on Fluoride Adsorption onto Magnesia-Amended Activated Carbon
In this work, the magnesia modified activated carbon (MgO-AC) adsorbent was characterized by scanning electron microscopy (SEM). The effects of co-existing anions on the MgO-AC adsorbent were investigated. The effects of adsorbent dose and solutions pH that influenced the sorption of anions and cations at the solid-liquid interface were also determined. The MgO-AC adsorbent could remove fluoride efficiently over a wide pH range of 5.00-8.00. The impact of major anions on fluoride adsorption followed the order of PO43− >HCO3− >SO42− >Cl− >NO3−.
Z. L. He et al., "Effects of Co-Existing Anions on Fluoride Adsorption onto Magnesia-Amended Activated Carbon", Advanced Materials Research, Vols. 463-464, pp. 47-51, 2012