Abstract:Solidification efficiencies of heavy metals and radioactive metals by alkali activated cement(AAC) were investigated by identification tests for extraction toxicity and long term leaching tests. The influence of heavy metal to AAC microstructure was analyzed by X ray diffraction, Fourier transform infrared spectroscopy(FTIR), scanning microscopy and energy spectroscopy. Results from identification tests for extraction toxicity show that AAC has a good capability to solidify heavy metals. Solidification rates of heavy metals including copper, lead, nickel, zinc and cadmium are above 99.97%. It is proved by FTIR that copper comes into the AAC product and affects vibration frequencies of OSiO