【摘要】 研究Fenton法降解青霉素模拟废水的动力学机理。主要考察氧化剂（H₂O₂）、催化剂(Fe²⁺)和青霉素钠（PGN）的浓度对青霉素处理效果的影响,并使用LC-MS对最终的降解产物进行分析。结果表明,当模拟废水中PGN浓度为3 000 mg/L、H₂O₂投加量为2 200 mg/L、Fe²⁺投加量为1 000 mg/L、反应温度为333 K时,反应100 min后PGN和COD的除去率分别达到97. 4%和59. 6%。处理后溶液的BOD5/COD从0. 011增加到0. 377。3个因素对青霉素降解速率的影响由大到小分别是PGN浓度>Fe²⁺浓度>H2O2浓度。该反应的活化能较低,为4. 66 k J/mol,说明该反应容易发生。产物分析表明,主要的降解产物为青霉噻唑酸、去羧青霉噻唑酸、异青霉二酸以及文献未提及的化合物A和B。更多还原

【Abstract】 Kinetics mechanism for the degradation of penicillin in simulated wastewater by Fenton oxidation was studied. Influence of concentrations of oxidants（ H2 O2）,catalyst( Fe²⁺) and penicillin G sodium（ PGN） on the degradation rate of penicillin was investigated. Results showed that when the concentrations of PGN in simulated wastewater was 3 000 mg/L,the dosage of H₂ O₂ was 2 200 mg/L,the dosage of Fe²⁺was 1 000 mg/L and temperature was 333 K,the removal rates of PGN and COD reached 97. 4% and 59. 6%after 100 min,respectively. BOD5/COD ratio was from 0. 011 to 0. 377 after treatment. Influence of the three factors on degradation rate of penicillin followed a descending order as PGN concentration>Fe²⁺concentration>H₂ O₂ concentration. Activation energy of this reaction was 4. 66 k J/mol,which was low,indicating that this Fenton reaction occured easily. Product analysis showed that the main degradation products included penicilloic acid,penilloic acid,isopenillic acid,as well as compound A and B which had not been mentioned in other literature.更多还原