近临界水中4,4′-二溴联苯催化氧化降解的研究  

Degradation of 4,4′-dibromobiphenyl by catalytic subcritical water oxidation

作　　者：李志[1] 陈晋阳[1] 刘桂洋[1] 阮如意[1] 

机构地区：[1]上海大学环境与化学工程学院,上海200444

出　　处：《现代化工》2010年第5期41-43,共3页Modern Chemical Industry

基　　金：上海市教育委员会科研创新项目(09YZ30)资助

摘　　要：以锰系氧化物作催化剂研究了4,4′-二溴联苯(4,4′-DBB)在近临界水中的氧化降解及反应动力学。确定了适宜的催化氧化工艺条件为物料质量比m(H2O2)∶m(4,4′-DBB)=300∶1、反应温度320℃、反应压力11.9 MPa、反应时间20 min,在此工艺条件下反应后水样的化学需氧量(COD)为32.6 mg/L,达到了GB8978—1996的排放要求。反应动力学结果表明4,4′-二溴联苯氧化反应的级数为1.71,表观活化能为37.89 kJ/mol。The oxidative degradation and the kinetics of 4,4＇-dibromobiphenyl （4,4＇-DBB） in subcritical water is investigated with manganese oxides as catalysts. The results show that 4,4＇-dibromobiphenyl can be degraded effectively by the subcritical water catalytic oxidation process and the optimized experimental conditions are obtained as follows： m（H202）： m（4,4＇-DBB） =300： 1 ,temperature of 320~（： ,pressure of 11.9 MPa,reaction time of 20 minutes. Under the optimal conditions,the COD of water sample after reaction can be reduced down to 32. 6 mg/L,which can meet the national standard GB8978--1996. The order of catalytic oxidation degradation of 4,4-dibromobiphenyl in subcritical water is 1.71, and the apparent activation energy is 37.89 kJ/mol.

关 键 词：4 4′-二溴联苯 近临界水氧化 催化 化学需氧量 

分 类 号：X703.1[环境科学与工程—环境工程]