For the destruction of toxic chlorinated organic compounds, this study proposes improved supercritical water oxidation method (multistep oxidation) using sodium nitrate as an oxidizer. This method solves the problems involved in the existing supercritical water oxidation method. Multistep oxidation means that NaNO3 is oxidized to N2 via NaNO2 and NO. Toxic and hard to destroy organic substances like para-dichlorobenzen(4-DCBz), polychlorinate biphenyl(PCB) ware oxidized to non toxic substances in a condition, in which rapid pressure and temperature rise is restrained as much as possible. 4-dichlorobenzene(4-DCBz) and Polychlorinate biphenyl(PCB) in condition(450℃, pw=0.25g/cm3, 30min) Was discomposed perfectly.

• 이상환(信州大学 工学部 物質工學科) | Sang-Hwan Lee Corresponding Author
• 박기철(信州大学 工学部 物質工學科) | Ki-Chul Park
• 박윤열(부산정보대학 생활과학대학) | Yoon-Yul Park
• 양종규(부산정보대학 생활과학대학) | Jong-Gyu Yang
• 김정성(대구대학교 화학교육과) | Jung-Sung Kim
• 富安 博(信州大学 工学部 物質工學科) | Tomiyasu Hiroshi