紀要論文 リン酸・マグネシウムを用いた焼却飛灰中セシウム・鉛の不溶化に関する研究
Simultaneous Insolubilization of Cesium and Lead in Incineration Fly Ash Using Phosphoric Acid and Magnesium Solution

諸岡, 龍  ,  土手, 裕  ,  関戸, 知雄

45pp.35 - 44 , 2016-07-31 , 宮崎大学工学部
ISSN:05404924
NII書誌ID(NCID):AA00732558
内容記述
In order to obtain the knowledge on simultaneous insolubilization of cesium and lead in incineration fly ash using phosphoric acid and magnesium solution, the insolubilization experiments of cesium in aqueous solution by the addition of phosphoric acid and magnesium solution and leaching test of stabilized fly ash were conducted. pH less than 12 was necessary to insolubilize cesium as CsMgPO4 using phosphoric acid magnesium. It was necessary to add the amount of phosphorus in P/Cs of 1000 in a molar ratio to fly ash to reduce lead concentration in leachate to the landfill standard of 0.3mg/L or less. At P/Cs of 1000, Mg/Cs of 20, and addition rate of P and Mg solution of 40%, the dissolution rate of the cesium could be less than 20%. These results indicated that it was possible to simultaneously insolubilize of cesium and lead in incineration fly ash using phosphoric acid and magnesium solution.
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