KAWAMOTO, Ariumi Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University
SUZUKI, Takashi Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University
KIBA, Nobutoshi Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University
Regeneration methods of Mg-Al-Cl form hydrotalcite-like ion exchanger for selective adsorption of phosphate anion were investigated. It was possible to regenerate the reusable exchanger with high efficiency by the two-step regeneration method consisting of the treatment with a mixture of 0.25 mol ·kg-1-NaOH and 6.00 mol·kg-1 NaCl solution at the first step, followed by that with 3.68 mol·kg-1 MgCl2 solution. The exchanger could be used for removal of phosphate ion with regeneration ratio of 50% even after nine times reuse. The regeneration ratio of the exchanger with granular form was examined in a flow system and found to be almost equal to 100% using the two-step regeneration method. The break-through capacity of the flow system was more than those of well-known zirconium ferrite type adsorbents even after six times runs.
Journal of the Society of Inorganic Materials, Japan
The Society of Inorganic Materials, Japan
Faculty of Life and Environmental Science