Decomposition of aniline in supercritical water.
The decomposition of aniline in supercritical water (SCW) was studied. Experiments were performed at various temperatures, pressures, residence times, dosage of oxidant H2O2 and initial aniline concentrations to investigate their effect on the destruction efficiency. Manganous sulfate and ferrous sulfate were screened out during the experiment to study the effect of the homogenous catalysts on destruction efficiency. The effect of pH was also studied. The experiments showed that the dosage of oxidant H2O2, experimental temperature, pressure, reaction residence time and even initial concentration of the aniline in wastewater have a significant affect on the TOC removal; manganous sulfate and ferrous sulfate improve the oxidation; TOC removal improves slightly with a decrease in the initial pH value. At a system temperature 450 degrees C, pressure 28 MPa, initial pH 4.0, residence time 46 s and K value 1.1, TOC removal can reach 100%.
Qi
Xin-Hua
XH
College of Environmental Science and Engineering, Nankai University, 300071, Tianjin, PR China.
Zhuang
Yuan-Yi
YY
Yuan
You-Cai
YC
Gu
Wen-Xin
WX
D000814:Aniline Compounds / Q000737:chemistry*; D002273:Carcinogens / Q000737:chemistry*; D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D016877:Oxidants / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen; D011312:Pressure; D013696:Temperature; D014865:Waste Disposal, Fluid; D014867:Water / Q000737:chemistry*; D014873:Water Pollutants
D000814:Aniline Compounds; D002273:Carcinogens; D016877:Oxidants; D014873:Water Pollutants; D014867:Water; D006861:Hydrogen Peroxide; D010100:Oxygen; C023650:aniline