KINETICS OF DYE-SENSITIZED PHOTO-DEGRADATION OF AQUEOUS PHENOL

摘要: The dye-sensitized photodegradation of aqueous phenol using rose bengal was carried out batchwise in the chemical region by an annular bubble-column photoreactor, to evaluate use sunlight wastewater treatment. Effects both partial pressure oxygen and initial concentration phenol, [A]0, on reaction rate were analyzed according scheme including quenching triplet dye 3D* with order determine kinetic parameters. constant singlet increased increasing pH 2.66 ×108 dm3/mol-s at 10.3. quantum yield 10.3 limited a maximum 0.29 [A]0=3 ×10-3 mol/dm3 for O2-bubbling 0.13 [A]0=1.4 air-bubbling which 4.0×108 dm3/mol• s. p-Benzoquinone, primary main product, underwent further degradation alkaline ground-state final products such as carboxylic acids. curves simulated closely up high conversions taking account effect quinone-type intermediate 3D*.