Abstract
Tobermorite has been successfully synthesized from incineration fly ash prewashed repeatedly and preheated at 800°C by hydrothermal treatment in the presence of NaOH solution. The crystallization field of tobermorite was examined as a function of reaction temperature, time and NaOH concentration. It was found that tobermorites were reproducibly formed in all of the fly ash treated with NaOH at 180°C, and sodalite and cancrinite generated as minor phases, with increasing NaOH concentration and extending reaction time. The products including tobermorite exhibited the removal characteristics for Cs+ and NH4+ ions.
