[目的]研究高级氧化技术(AOT)处理含酚废水的可行性。[方法]运用AOT技术,研究不同p H、Fe2+用量、H2O2用量、紫外灯波长及反应时间对废水中苯酚的去除效果,优化最佳条件。[结果]当p H为3,Fe2+用量为0.30 m L,H2O2用量为1.00 m L,紫外灯...[目的]研究高级氧化技术(AOT)处理含酚废水的可行性。[方法]运用AOT技术,研究不同p H、Fe2+用量、H2O2用量、紫外灯波长及反应时间对废水中苯酚的去除效果,优化最佳条件。[结果]当p H为3,Fe2+用量为0.30 m L,H2O2用量为1.00 m L,紫外灯波长为253.7 nm,反应时间为120 min时,处理效果最好,苯酚去除率达到35.06%。[结论]在含酚废水的去除及可生化性改善方面,AOT是一种可行有效的方式。展开更多
A synergistic UV/TiO2/Fenton(PCF)process is investigated for the degradation of ibuprofen(IBP)at circumneutral pH.The IBP decay in the PCF process is much faster than that with the conventional UV,UV/H2O2,Fenton,photo...A synergistic UV/TiO2/Fenton(PCF)process is investigated for the degradation of ibuprofen(IBP)at circumneutral pH.The IBP decay in the PCF process is much faster than that with the conventional UV,UV/H2O2,Fenton,photo‐Fenton,and photocatalysis processes.The kinetics analysis showed that the IBP decay follows a two‐stage pseudo‐first order profile,that is,a fast IBP decay(k1)followed by a slow decay(k2).The effects of various parameters,including initial pH level,dosage of Fenton’s reagent and TiO2,wavelength of UV irradiation,and initial IBP concentration,are evaluated.The optimum pH level,[Fe2+]0,[Fe2+]0/[H2O2]0 molar ratio,and[TiO2]0 are determined to be approximately 4.22,0.20 mmol/L,1/40,and 1.0 g/L,respectively.The IBP decay at circumneutral pH(i.e.,6.0–8.0 for wastewater)shows the same IBP decay efficiency as that at the optimum pH of 4.22 after 30 min,which suggests that the PCF process is applicable for the treatment of wastewater in the circumneutral pH range.The lnk1 and lnk2 are observed to be linearly correlated to 1/pH0,[IBP]0,[H2O2]0,[H2O2]0/[Fe2+]0 and ln[TiO2]0.Mathematical models are therefore derived to predict the IBP decay.展开更多
文摘[目的]研究高级氧化技术(AOT)处理含酚废水的可行性。[方法]运用AOT技术,研究不同p H、Fe2+用量、H2O2用量、紫外灯波长及反应时间对废水中苯酚的去除效果,优化最佳条件。[结果]当p H为3,Fe2+用量为0.30 m L,H2O2用量为1.00 m L,紫外灯波长为253.7 nm,反应时间为120 min时,处理效果最好,苯酚去除率达到35.06%。[结论]在含酚废水的去除及可生化性改善方面,AOT是一种可行有效的方式。
文摘A synergistic UV/TiO2/Fenton(PCF)process is investigated for the degradation of ibuprofen(IBP)at circumneutral pH.The IBP decay in the PCF process is much faster than that with the conventional UV,UV/H2O2,Fenton,photo‐Fenton,and photocatalysis processes.The kinetics analysis showed that the IBP decay follows a two‐stage pseudo‐first order profile,that is,a fast IBP decay(k1)followed by a slow decay(k2).The effects of various parameters,including initial pH level,dosage of Fenton’s reagent and TiO2,wavelength of UV irradiation,and initial IBP concentration,are evaluated.The optimum pH level,[Fe2+]0,[Fe2+]0/[H2O2]0 molar ratio,and[TiO2]0 are determined to be approximately 4.22,0.20 mmol/L,1/40,and 1.0 g/L,respectively.The IBP decay at circumneutral pH(i.e.,6.0–8.0 for wastewater)shows the same IBP decay efficiency as that at the optimum pH of 4.22 after 30 min,which suggests that the PCF process is applicable for the treatment of wastewater in the circumneutral pH range.The lnk1 and lnk2 are observed to be linearly correlated to 1/pH0,[IBP]0,[H2O2]0,[H2O2]0/[Fe2+]0 and ln[TiO2]0.Mathematical models are therefore derived to predict the IBP decay.
