DETOXIFICATION TREATMENT METHOD OF FLUORINE-CONTAMINATED SOIL

To provide a detoxification treatment method of fluorine-contaminated soil capable of decontamination of a fluorine-contaminated soil with simplified number of process and at low cost, and stabilizing its state for an extended period.SOLUTION: In the method, fluorine is insolubilized by adding to a...

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Bibliographische Detailangaben
Hauptverfasser:	KURANO AKIO, MATSUO TAKASHI, KOYAMA TAKASHI, OYAMA SUSUMU, ARITA RYOICHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	DISPOSAL OF SOLID WASTE PERFORMING OPERATIONS RECLAMATION OF CONTAMINATED SOIL RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING
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Beschreibung
Zusammenfassung:	To provide a detoxification treatment method of fluorine-contaminated soil capable of decontamination of a fluorine-contaminated soil with simplified number of process and at low cost, and stabilizing its state for an extended period.SOLUTION: In the method, fluorine is insolubilized by adding to a contaminated soil at least one kinds of ferrous inorganic coagulants selected from a group consisting of an acid, ferric chloride, ferric sulfate and polyferric sulfate to control its pH to be in a weak acid region of 4.0-6.5.SELECTED DRAWING: Figure 1 【課題】フッ素汚染土を、工程数を簡略化して、低コストで浄化し、その状態を長期間に亘って安定化させることができるフッ素汚染土の無害化処理方法を提供すること。【解決手段】汚染土に対して、酸と、塩化第二鉄、硫酸第二鉄及びポリ硫酸第二鉄からなる群から選ばれた少なくとも１種の鉄系無機凝集剤とを加えてｐＨを４．０〜６．５の弱酸性領域となるようにすることによりフッ素を不溶化させる。【選択図】図１