非均相催化降解去除废水中过氧化氢异丙苯

发布时间：2018-01-24 05:59

  本文关键词： 非均相催化 降解 脱毒 过氧化氢异丙苯 二氧化锰 动力学　出处：《环境科学研究》2016年09期 　论文类型：期刊论文

【摘要】：为消除废水中CHP(过氧化氢异丙苯)对废水生物处理系统的不利影响,筛选出MnO_2为适合催化CHP降解脱毒的非均相催化剂,并以MnO_2为催化剂,催化降解自配废水中的CHP,采用间歇试验考察了反应pH、温度、MnO_2投加量、初始ρ(CHP)对CHP去除效果的影响,对CHP降解动力学进行了分析,同时对处理前后废水组分和生物毒性做了鉴定.结果表明:CHP催化降解速率与温度、初始ρ(CHP)和ρ(MnO_2)呈正相关;pH为4~10,温度为50~70℃,ρ(MnO_2)为10~20 g/L是较为优化的反应条件.MnO_2催化降解CHP的反应符合表面反应机制,催化剂表面接触面积越大,CHP降解速率越快;在pH为2或3时,CHP降解速率显著高于pH为4~10时,但Mn溶出较为显著.在初始ρ(CHP)为0.4~1.0 g/L时,CHP催化降解反应遵循一级反应动力学,符合Arrhenius方程,Ea(表观活化能)为37.56 k J/mol.反应产物主要为2-苯基-2-丙醇,处理后废水的OUR(耗氧速率)抑制率由63%降为0,对活性污泥没有抑制.
[Abstract]:In order to eliminate the adverse effect of CHP (cumene hydroperoxide) on wastewater biological treatment system, MnO_2 was selected as a heterogeneous catalyst suitable for catalytic CHP degradation and detoxification. MnO_2 was used as catalyst to catalyze the degradation of CHP in self-made wastewater. The pH of the reaction and the dosage of MNO _ 2 were investigated by batch test. The effect of initial 蟻 (Ch) on the removal efficiency of CHP was studied, and the degradation kinetics of CHP was analyzed. At the same time, the composition and biotoxicity of wastewater before and after treatment were identified. The results showed that the catalytic degradation rate of 1: CHP was positively correlated with temperature, initial 蟻 (CHP) and 蟻 (MNO _ 2). The pH is 4 ~ 10 and the temperature is 50 ~ 70 鈩，

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