非均相催化臭氧氧化深度处理钻井废水的机理和动力学  

Kinetics and Mechanism of Advanced Treatment of Drilling Wastewater by Heterogeneous Catalytic Ozonization

作　　者：杨德敏[1,2] 夏宏[1,2] 门奇 程方平[1,2] 

机构地区：[1]国土资源部页岩气资源勘查重点实验室重庆市页岩气资源与勘查工程技术研究中心重庆地质矿产研究院,重庆400042 [2]油气资源与探测国家重点实验室重庆页岩气研究中心,重庆400042 [3]重庆市江北区环境监测站,重庆400025

出　　处：《石油化工》2014年第3期343-347,共5页Petrochemical Technology

基　　金：重庆市应用开发科技项目(cstc2013yykfA20002);重庆市国土房管局重大科技攻关项目(CQGT-KJ-2012-6)

摘　　要：采用O3/MnO2催化氧化对经过混凝处理后的钻井废水进行深度处理,重点研究了O3/MnO2催化氧化去除钻井废水中有机物的机理和动力学。实验结果表明,CO32-和HCO3-的存在对O3/MnO2催化氧化具有一定的抑制作用,尤其是加入20 mmol/L的叔丁醇后,反应40 min时的CODCr去除率下降了32.52百分点,证明O3/MnO2催化氧化过程是羟基自由基主导作用机理,O3/MnO2催化氧化去除钻井废水中有机物的过程遵循羟基自由基机理。动力学研究结果表明,该过程符合表观一级反应动力学规律,其拟合方程式为:[CODCr]t=-0.049 5t+0.000 9,相关系数R2=0.997 1。The advanced treatment of drilling wastewater after treated by coagulation was conducted by catalytic ozonization over MnO2 catalyst,and the kinetics and mechanism of the advanced treatment were experimentally investigated.The results indicated that the existences of CO32-and HCO3-could inhibit the catalytic ozonization to some extent.The CODCr removal rate declined by 32.52 percentage point after tert-butyl alcohol with concentration 20 mmol/L was added and reacted for 40 min,which proved that the removal of organic matter in the drilling wastewater followed the hydroxyl radical mechanism.The investigation showed that the catalytic ozonization of the drilling wastewater followed the apparent pesudo-first-order kinetics,its fitting equation was [CODCr] t=-0.049 5t＋0.000 9,and the correlation coefficient R2 was 0.997 1.

关 键 词：非均相催化臭氧氧化 钻井废水 机理 反应动力学 

分 类 号：X703[环境科学与工程—环境工程]