Decomposition of 2-nitrophenol in aqueous solution by ozone and UV/ozone processes.
The decomposition of 2-nitrophenol in aqueous solutions by ozone and UV/ozone processes was found to be technically feasible under adequate experimental conditions. Formation of nitrate ions was observed following the decomposition of 2-nitrophenol by ozone and UV/ ozone processes. Increasing ozone dosage and UV light intensity accelerated the decomposition rate of 2-nitrophenol in an aqueous solution. The species distribution of 2-nitrophenol under various solution conditions plays a significant role in determining decomposition behavior. In most experiments conducted in this study, the decomposition of 2-nitrophenol by ozone and UV/ozone processes was favored to occur in alkaline conditions. The addition of 2-butanol accelerated the rate of gaseous ozone transfer to an aqueous phase by reducing the surface tension of aqueous solution and therefore enhancing the decomposition rate of 2-nitrophenol by ozone and UV/ozone processes.
Ku
Young
Y
Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan. ku508@mail.ntust.edu.tw
Hung
Jia-Jing
JJ
Wang
Wen-Yu
WY
D015386:Hazardous Substances; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009596:Nitrophenols / Q000737:chemistry* / Q000528:radiation effects*; D010126:Ozone; D010782:Photolysis; D012996:Solutions / Q000737:chemistry; D013997:Time Factors; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000737:chemistry*
D015386:Hazardous Substances; D009596:Nitrophenols; D012996:Solutions; D014867:Water; D010126:Ozone; C045573:2-nitrophenol