FLUORINE INSOLUBILIZATION AGENT, ITS MANUFACTURING METHOD, PROCESSED GYPSUM, FLUORINE-CONTAINING CONTAMINATED SOIL AND PROCESSING METHOD OF CONTAMINATED WATER

To provide a fluorine insolubilization agent that improves a delay time seen in a reaction between calcium hydrogen phosphate dihydrate (DCPD) and a fluoride ion and has activity higher than the DCPD, a manufacturing method of the fluorine insolubilization agent capable of adjusting at an installati...

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Hauptverfasser:	TAKADA MASAFUMI, TOYOSHIMA GOJI, TAFU MASAMOTO, HAGINO YOSHIAKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADHESIVES CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS DISPOSAL OF SOLID WASTE DYES INORGANIC CHEMISTRY MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PERFORMING OPERATIONS POLISHES RECLAMATION OF CONTAMINATED SOIL RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Zusammenfassung:	To provide a fluorine insolubilization agent that improves a delay time seen in a reaction between calcium hydrogen phosphate dihydrate (DCPD) and a fluoride ion and has activity higher than the DCPD, a manufacturing method of the fluorine insolubilization agent capable of adjusting at an installation spot by using a solution of a more simple composition, and a processing method of contaminated soil or contaminated water.SOLUTION: A fluorine insolubilization agent obtained by attaching FAp on a surface of DCPD powder, according to a method of precipitating fluorine apatite (FAp) on a surface of DCPD, by dipping calcium hydrogen phosphate dihydrate in a weak acidic solution containing Caion, HPOion and Fion.SELECTED DRAWING: Figure 3 【課題】リン酸水素カルシウム二水和物（ＤＣＰＤ）とフッ化物イオンとの反応に見られる遅れ時間を改善し、ＤＣＰＤの高い活性化を有するフッ素不溶化剤、より単純な組成の溶液を使用して施工現場で調製可能なフッ素不溶化剤の製造方法、汚染土壌又は汚染水の処理方法を提供すること。【解決手段】Ｃａ２＋イオン、ＨＰＯ４２−イオン及びＦ−イオンを含有する弱酸性溶液に、リン酸水素カルシウム二水和物を浸漬させ、ＤＣＰＤの表面に、フッ素アパタイト（ＦＡｐ）を沈着させる方法により、ＤＣＰＤ粉末の表面にＦＡｐが付着してなるフッ素不溶化剤を提供できる。【選択図】図３