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Reduction of Fluorine, Boron and Heavy Metals Leaching from Coal Ash by Adding Fixation Chemicals
Makoto Iwasaki,Kaori Inoue,Kazuya Ikeshima,Tadashi Ishizuka 한국펄프·종이공학회 2006 한국펄프종이학회 기타 간행물 Vol.- No.-
In order to utilize coal fly ash (hereafter:coal ash ) discharged from coal boiler as a material for civil engineering usage such as snow melter or soil improver, we have to prevent leaching hazardous elements such as fluorine, boron and heavy metals from the coal ash because the leaching concentrations of some elements in the ash exceed the Japanese standards for environmental soil quality. Through the laboratory experiments and mill trials, we confirmed that the leaching concentrations of fluorine, boron and heavy metals were maintained below their environmental standards by mixing with fixation chemicals and curing for a short time.