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钨酸钠-双氧水体系催化氧化降解亚甲基蓝

高立新,张大全,顾茸义   

  1. 上海电力学院能源与环境工程学院,上海 200090
  • 出版日期:2011-04-05 发布日期:2011-04-05

Degradation of methylene blue by catalytic oxidation in Na2WO4-H2O2 system

GAO Lixin,ZHANG Daquan,GU Rongyi   

  1. School of Thermal Power and Environmental Engineering,Shanghai University of Electric Power,Shanghai 200090,China
  • Online:2011-04-05 Published:2011-04-05

摘要:

研究了钨酸钠-双氧水体系对亚甲基蓝模拟印染废水的催化氧化降解效果。结果表明,当0.01 mol/L的钨酸钠溶液的加入量为7.0 mL30%的双氧水溶液的加入量为3.5 mL、反应温度60 、反应40 min后,对100 mL浓度为10 mg/L亚甲基蓝模拟废水的脱色率接近100%。反应在较宽的pH值范围(114),都有较好的去除效果。紫外可见光谱分析表明,原水样在664 nm614 nm292 nm244 nm处的特征吸收波峰消失了,降解为小分子物质。在此条件下的亚甲基蓝降解速率常数为0.0879 min1,活化能较低,为34.61 kJ/mol反应符合一级反应动力学模型

Abstract:

The degradation of methylene blue by catalytic oxidation in Na2WO4-H2O2 system was discussed. The results showed that the degradation rate of methylene blue was near 100% after 40 min of reaction in Na2WO4-H2O2 systemThe optimum conditions for 100mL methylene blue10 mg/Ldegradation were as followsreaction temperature 60 sodium tungstate0.01 mol/Ldosage 7.0 mL30% H2O2 solution dosage 3.5mL. The degradation of methylene blue was effective in a wide range of pH value114. The UV-Vis spectroscopic analyses found that the characteristic absorption peaks originally in 664 nm614 nm and 292 nm244 nm disappearedindicating that hazardous organic compounds were transformed into small molecules. Under these conditionsreaction rate constant for methylene blue degradation was 0.0879 min1activation energy was 34.61 kJ/mol. The degradation of methylene blue in Na2WO4-H2O2 system accorded well with the first-order kinetics mode1.

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