Adsorptive removal of trace concentration of fluoride ion from water by using dried orange juice residue

- Novel adsorbents for fluoride were prepared from low cost cattle food marketed in Japan.
- 100% Removal of trace concentration of fluoride ion from actual plating solution.
- Zr(IV)-DOJR exhibited strong affinity and high adsorption capacity for fluoride ion.
- Zr(IV)-DOJR shows superior durability at least nine repeated adsorption-elution cycles.
- Loaded fluoride could be successfully desorbed by simple alkali solution.