HEAVY METAL IMMOBILIZE METHOD IN FLY ASH

To provide a heavy metal immobilize method which can suppress elution of heavy metals, especially mercury, without adding abundant chelate agent even if fly ash is highly alkaline, and to provide an agent composition therefor.SOLUTION: A heavy metal immobilize method includes a step of adding a chel...

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Bibliographic Details
Main Author HAMA TOSHIO
Format Patent
LanguageEnglish
Japanese
Published 06.12.2018
Subjects
ADHESIVES
CHEMISTRY
DISPOSAL OF SOLID WASTE
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
PERFORMING OPERATIONS
POLISHES
RECLAMATION OF CONTAMINED SOIL SOIL
TRANSPORTING
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Summary:To provide a heavy metal immobilize method which can suppress elution of heavy metals, especially mercury, without adding abundant chelate agent even if fly ash is highly alkaline, and to provide an agent composition therefor.SOLUTION: A heavy metal immobilize method includes a step of adding a chelate agent for heavy metal immobilizing, water for humidifying and polymer coagulant to fly ash caused by incineration disposal or gasification fusion processing of non-industrial wastes or industrial wastes, mixing them and kneading them. The polymer coagulant is anionic, nonionic or amphoteric polymer coagulant.SELECTED DRAWING: None 【課題】飛灰が高アルカリ性であったとしてもキレート薬剤を多量に加えることなく重金属、特に水銀の溶出を抑制することができる重金属の固定化方法および当該固定化方法のための薬剤組成物を提供する。【解決手段】本発明の飛灰中の重金属固定化方法は、一般廃棄物または産業廃棄物の焼却処理またはガス化溶融処理に起因して生じた飛灰に、重金属固定用のキレート薬剤と、加湿用の水と、高分子凝集剤とを加えて混錬する工程を含み、該高分子凝集剤は、アニオン系、ノニオン系、または両性の高分子凝集剤であることを特徴とする。【選択図】なし
Bibliography:Application Number: JP20170101104