Elution suppression treatment of heavy metals from municipal solid waste fly ash was applied by preparing geopolymer mixed Akadama soil as easily available volcanic soil. The solidified substances of Akadama soil mixed municipal solid waste incineration fly ash geopolymer were evaluated by the Japanese leaching test No. 13 defined by the Ministry of the Environment, tank leaching test, and compressive strength test. Quantitative values of As, Cd, Cr, Pb, Fe, Mn, Sr, and Zn in eluted solutions were quantified using inductively coupled plasma atomic emission spectrometry. The leaching amounts of heavy metals from Akadama soil-mixed fly ash geopolymer were suppressed as Cd not detected, 1/3 for Cr, 1/500 for Pb, 1/19 for Sr, and 1/23 for Zn, respectively, compared to those of raw fly ash. It is considered that soil-mixed fly ash geopolymer solidification can be applied as an effective treatment technique for elution suppression of heavy metals from the incinerator fly ash.
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