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Ultrasound-Heterogeneous Catalytic Oxidation of Phenol in Aqueous Solutions


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Ultrasound-Heterogeneous Catalytic Oxidation of Phenol in Aqueous Solutions
ZHU J in-rong1 2a LU Jian1 KONG L-im ing2b N I X iao-wu1
1. Schoo l o f Sciences, NUST, N an jing 210094, Ch ina; 2. a. Co llege of Physics Science and Techno logy; b. Co llege of Chem istry and Chem ica lEng ineering, Yang zhou Un iversity, Yangzhou 225002, Ch ina
ultrasound CuO N i2O3 MnO2 phenoloxidation
The deg radat ion of pheno l is invest igated in the presence of u ltrasound /H2O2 /CuO, u-l trasound /H2O2 /N i2O3 and ultrasound /H2O2 /MnO2 systems. The in it ia l concen trat ion of 25 mg /L phenol is se lected as model pollutant aqueous and the cata ly tic ox idation is carried out in a jacketed beaker. U nder the conditions o f ultrasound intensity 4. 97W /cm2, H2O2 in itial concentra tion 300 mg /L, cata lyst dosage 1 g /L and the temperature 30℃ , the h igher efficency o f pheno l degradation can be ach ieved in u ltrasound /H2O2 /CuO compared w ith other catalytic systems. The removal ratio of pheno l is 24. 0%, 53. 3%, 13. 8% and 89. 5% respectively correspond ing to u ltrasound, ultrasound /H2O2, CuO /H2O2 and ultrasound /H2O2 /CuO treatmen t systems w ith the u ltrasound irrad iat ion 240m in. It is indicated that u ltrasound, H2O2 and CuO have synerg ist ic effec.t When the temperature increases from 20 ℃ to 50 ℃ , the pheno l remova l ratio increases apparen tly under the three kinds of system s, therefore, the enhanced deg radat ion o f pheno l can be ascribed to catalytic effect instead o f u ltrason ic effect.


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Last Update: 2006-12-30