| 非均相催化降解去除废水中过氧化氢异丙苯 |
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| 引用本文： | 徐守强,宋玉栋,李志民,周岳溪,章丽萍.非均相催化降解去除废水中过氧化氢异丙苯[J].环境科学研究,2016,29(9):1378-1384. |
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| 作者姓名： | 徐守强 宋玉栋 李志民 周岳溪 章丽萍 |
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| 作者单位： | 1.中国矿业大学北京化学与环境工程学院, 北京 100083 ;中国环境科学研究院水污染控制技术研究中心, 北京 100012 ;中国环境科学研究院,环境基准与风险评估国家重点实验室, 北京 100012 |
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| 基金项目： | [ZK(]国家水体污染控制与治理科技重大专项(2012XZ07201-005)[ZK)] |
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| 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MnO2为适合催化CHP降解脱毒的非均相催化剂,并以MnO2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、MnO2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(MnO2)呈正相关；pH为4～10,温度为50～70 ℃,ρ(MnO2)为10～20 g/L是较为优化的反应条件.MnO2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 kJ/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.
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| 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 |
| 收稿时间： | 2016/1/20 0:00:00 |
| 修稿时间： | 2016/3/4 0:00:00 |
Degradation and Removal of Cumene Hydroperoxide from Wastewater through Heterogeneous Catalysis |
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| XU Shouqiang,SONG Yudong,LI Zhimin,ZHOU Yuexi and ZHANG Liping.Degradation and Removal of Cumene Hydroperoxide from Wastewater through Heterogeneous Catalysis[J].Research of Environmental Sciences,2016,29(9):1378-1384. |
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| Authors: | XU Shouqiang SONG Yudong LI Zhimin ZHOU Yuexi and ZHANG Liping |
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| Institution: | School of Chemical and Environmental Engineering, China University of Mining and TechnologyBeijing, Beijing 100083, China ;[ZK]Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China [ZK] ;[ZK]State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China[ZK],[ZK]Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China [ZK] ;[ZK]State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China[ZK],Jilin Petrochemical Company, Ltd., Petrochina, Jilin 132022, China,[ZK]Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China [ZK] ;[ZK]State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China[ZK] and School of Chemical and Environmental Engineering, China University of Mining and TechnologyBeijing, Beijing 100083, China |
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| Abstract: | Abstract:The occurrence of cumene hydroperoxide(CHP) in wastewater raises serious concerns regarding its adverse impact on biological wastewater treatment systems.A suitable heterogeneous catalyst,manganese dioxide(MnO2),was selected to remove CHP from wastewater.Batch experiments were carried out to evaluate the effects of some factors,such as initial CHP concentration,contact time,catalyst dosage,solution pH and temperature,on the degradation performances of CHP using MnO2.The degradation kinetics of CHP on MnO2 could be expressed by the first-order model when initial CHP concentration was 0.4-1.0 g/L.The catalytic reaction followed the Arrhenius equation,and the apparent activation energy was 37.56 kJ/mol.This indicated that the degradation rate of CHP was positively related to CHP concentration,reaction temperature and catalyst dosage,while it was negatively related to solution pH.High removal efficiencies of CHP were achieved at pH=4-10,50-70 ℃,and 10-20 g/L of catalyst dosage.The degradation of CHP on MnO2 followed the surface reaction mechanism:the degradation rate was higher for greater surface area of catalyst.The degradation rate of CHP decreased with the increase of pH,and a higher dissolution of manganese was obtained at pH=2-3.In addition,the main degradation product,which was 2-phenyl-2-propanol,had little inhibiting effect on microbial activity of activated sludge,and the inhibition rate of oxygen uptake rate(OUR) decreased from 63% to 0. |
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