Fenton试剂催化氧化嘧啶废水的特性
Characteristics of pyrimidine containing wastewater catalytic oxidation with Fenton reagent
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摘要: 研究了Fenton催化氧化法对废水中嘧啶的去除效能,优化了处理体系中的反应条件,分析了各影响因子的作用机理;并用一元线性回归方程对不同温度下,嘧啶相对残余浓度对反应时间的相关性进行了定量分析。结果表明:温度为25℃,pH为3.5,Fe2+的投加量64 mmol/L,H2O2投加量为300 mmol/L时,反应2 h,Fenton试剂对嘧啶和COD的去除率分别达90%和50%以上;同时发现Fenton试剂对嘧啶的氧化降解具有相对优先性,且符合一级反应动力学模式,并计算表观反应速率常数和活化能。Abstract: The catalytic oxidation of pyrimidine containing wastewater by Fenton reagent was evaluated. The operating conditions of Fenton reaction were investigated and the factors of the chemical treatment were analyzed. The correlativity of the reaction time and relatively remain pyrimidine was analyzed by the unitary linear regress equation at different temperatures. The optimal conditions were following: 25℃, 300 mmol/L H2O2, 64 mmol/L Fe2+, pH 3.5, and the pyrimidine and COD removal rate is over 90% and 50% respectively, after 2 hours’ reaction time. Prior character in the catalytic degradation of pyrimidine, the oxidation of pyrimidine by Fenton reagent was in conformity with first-order dynamics model and the velocity coefficient and activation energy was got at the same time.
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Key words:
- Fenton reagent /
- pyrimidine containing wastewater /
- catalytic oxidation /
- kinetics
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