The degradation of p-nitrotoluene by O3/H2O2 process in a bubble contact column was investigated. Effects of the molar ratio of hydrogen peroxide to ozone,pH value and t-butanol on the oxidation process were discussed...The degradation of p-nitrotoluene by O3/H2O2 process in a bubble contact column was investigated. Effects of the molar ratio of hydrogen peroxide to ozone,pH value and t-butanol on the oxidation process were discussed. It was found that the proper H2O2/O3 molar ratio for the degradation of p-nitrotoluene was around 0.6, different pH values and the presence of t-butanol highly influenced the removal efficiency of p-nitrotoluene. 5-methyl-2-nitrophenol, 2-methyl-5-nitrophenol, (4-nitrophenyl) methanol, 5-(hydroxymethyl)-2-nitro phenol, acetic acid, 2-methylpropane diacid and 2-(hydroxylmethyl)propane diacid were identified as degradation intermediates and products through GC-MS. Radical reaction mechanism and degradation pathway were proposed based on the results of experiments. It is deduced that the benzene ring of p-nitrotoluene can be only destroyed by hydroxyl radicals through a polyhydroxy intermediate pathway. Then unstable polyhydroxy intermediates can be oxidized to different acids with low molecular weight rapidly.展开更多
The title compound [UO2 （p-CH3C6H4SOC4H9）2 （NO3 ）2] is triclinicwith space group P1. a=8. 651 （3）, b=9. 097（2）, c=9. 621 （2） A;a=92. 29（1）, β=95. 97（3）, r=98. 25（3）, V=744. 1（3） A3, Z=1, Mr=786.41, ...The title compound [UO2 （p-CH3C6H4SOC4H9）2 （NO3 ）2] is triclinicwith space group P1. a=8. 651 （3）, b=9. 097（2）, c=9. 621 （2） A;a=92. 29（1）, β=95. 97（3）, r=98. 25（3）, V=744. 1（3） A3, Z=1, Mr=786.41, Dc=1. 425 g/cm3. u=5. 626 mm-1, F （000） =300. R=0. 030, Rw=0. 071 for 2917 reflectionswith I≥2（I）. Uranyl ion is coordinated to six oxygen atoms, of which two are fromtwo monodenate sulfoxides and the others from two nitrate groups. The coordinationPOlyhedron around U is a hexagonal bipyramid, the U atom is in the center of symmetry.展开更多
基金Sponsored by the National Natural Science Foundation of China(Grant No.50378028)
文摘The degradation of p-nitrotoluene by O3/H2O2 process in a bubble contact column was investigated. Effects of the molar ratio of hydrogen peroxide to ozone,pH value and t-butanol on the oxidation process were discussed. It was found that the proper H2O2/O3 molar ratio for the degradation of p-nitrotoluene was around 0.6, different pH values and the presence of t-butanol highly influenced the removal efficiency of p-nitrotoluene. 5-methyl-2-nitrophenol, 2-methyl-5-nitrophenol, (4-nitrophenyl) methanol, 5-(hydroxymethyl)-2-nitro phenol, acetic acid, 2-methylpropane diacid and 2-(hydroxylmethyl)propane diacid were identified as degradation intermediates and products through GC-MS. Radical reaction mechanism and degradation pathway were proposed based on the results of experiments. It is deduced that the benzene ring of p-nitrotoluene can be only destroyed by hydroxyl radicals through a polyhydroxy intermediate pathway. Then unstable polyhydroxy intermediates can be oxidized to different acids with low molecular weight rapidly.
文摘The title compound [UO2 （p-CH3C6H4SOC4H9）2 （NO3 ）2] is triclinicwith space group P1. a=8. 651 （3）, b=9. 097（2）, c=9. 621 （2） A;a=92. 29（1）, β=95. 97（3）, r=98. 25（3）, V=744. 1（3） A3, Z=1, Mr=786.41, Dc=1. 425 g/cm3. u=5. 626 mm-1, F （000） =300. R=0. 030, Rw=0. 071 for 2917 reflectionswith I≥2（I）. Uranyl ion is coordinated to six oxygen atoms, of which two are fromtwo monodenate sulfoxides and the others from two nitrate groups. The coordinationPOlyhedron around U is a hexagonal bipyramid, the U atom is in the center of symmetry.
