均相Fenton法处理石化废水反渗透浓水

Study on Treatment of Reverse Osmosis Concentrate of Petrochemical Wastewater by Homogeneous-Fenton Process

采用均相Fenton法处理石化废水反渗透浓水,考察了H2O2浓度、Fe2+浓度、初始p H以及反应温度等因素对处理效果的影响,并分析了反渗透浓水的可生化性及污染物变化特征。结果表明,在H2O2浓度为75.0 mmolL,Fe2+浓度为7.5 mmolL,初始p H为3.0,反应温度为25℃的条件下,反应2.0 h后反渗透浓水TOC浓度由198.4 mgL降到111.6 mgL,有机物矿化去除率达43.7%,BOD5CODCr由0.11提高至0.28,反渗透浓水污染物浓度大幅降低,可生化性也得到明显改善。反渗透浓水处理前后的三维荧光光谱(EEM)分析结果表明,均相Fenton法对反渗透浓水中荧光有机物总去除率可达78.7%,改善了反渗透浓水的可生化性。

The homogeneous Fenton process was applied to the treatment of petrochemical reverse osmosis concentrate（ ROC）. The effects of H2O2 concentration,Fe2 ＋concentration,initial p H and reaction temperature on the treatment efficiencies were investigated,and the biodegradability of wastewater and the variations characteristics of the pollutants analyzed. The results showed that under the optimum reaction conditions of H2O2concentration75. 0 mmolL,Fe2 ＋concentration 7. 5 mmolL,initial p H 3. 0 and reaction temperature 25 ℃,after 2. 0 h reaction,TOC concentration decreased from 198. 4 mgL to 111. 6 mgL,the organics mineralization removal efficiency reached 43. 7%,and the BOD5CODCrratio increased from 0. 11 to 0. 28. The biodegradability of ROC was significantly improved and the concentration of the pollutants greatly decreased. The excitation-emission matrix（ EEM） spectrum analysis demonstrated that the total removal efficiency of the fluorescence organics by homogeneous Fenton process reached 78. 7%,which improved the biodegradability of the wastewater.