METHOD FOR REMOVING FLUORIDE ION

PROBLEM TO BE SOLVED: To provide a new method for removing a fluoride ion, with which a large volume of wastewater is treated at a low cost.SOLUTION: In a method for removing a fluoride ion, an adsorbent which is obtained by cleaning a mandarin orange squeezed juice residue, having been treated by h...

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Hauptverfasser:	KAWAKITA HIDETAKA, INOUE KATSUTOSHI, PAUDYAL HARI, OWATARI KEISUKE
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HUMAN NECESSITIES METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR RELEVANT APPARATUS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a new method for removing a fluoride ion, with which a large volume of wastewater is treated at a low cost.SOLUTION: In a method for removing a fluoride ion, an adsorbent which is obtained by cleaning a mandarin orange squeezed juice residue, having been treated by heating and drying, with water to remove a water-soluble organic material and a water-soluble calcium compound therefrom, and making a tetravalent zirconium ion and/or a tetravalent cerium ion be adsorbed and carried thereon, is immersed in an aqueous solution to be treated and the fluoride ion in the aqueous solution to be treated is adsorbed thereon and removed from the aqueous solution.