火山灰-活性炭的制备表征及其催化湿式氧化研究  

Preparation and Characterization of Activated Carbon-Pozzuolana and Its Study on CWAO

作　　者：蔡玲华[1] 胡以强[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《环境科学与技术》2012年第10期176-181,共6页Environmental Science & Technology

摘　　要：采用自制的酚醛树脂基火山灰-活性炭负载Ce稀土催化剂在间歇式反应釜中催化湿式氧化(Catalytic wet air oxidation,CWAO)降解高浓度苯酚废水至可生化要求。发现经过浸渍、固化、炭化3个循环后可以获得9%的含炭量、1 020 m2/g的比表面积、0.57 cm3/g的总孔容并能满足后续反应所需的传质要求。同时研究了不同的炭化升温速率和炭化温度对火山灰-活性炭的性能的影响,发现升温速率为4℃/min、炭化温度为850℃时火山灰-活性炭获得最佳的结构特征。通过最佳工艺制备得到的催化剂,COD去除率达到92.4%,甲醛、苯酚去除率接近100%,BOD5/COD=0.42,满足可生化处理的要求。Catalytic wet air oxidation（CWAO） of high concentrated phenol wastewater,using the prepared catalyst of phenolic resin based activated carbon-pozzuolana sphere supported Ce,was studied in a stirred batch reactor to meet the biological treatment requirement.The activated carbon-pozzuolana could achieve carbon content of 9%,specific surface area of 1 020 m2/g and pore volume 0.57 cm3/g after three circulations of impregnation,curing and carbonization,which could meet the mass transfer requirement in the reaction stage.The carbon-pozzuolana reached an optimal structure characterization at carbonization heating rate of 4 ℃/min and carbonization temperature of 850 ℃.COD removal rate reached 92.4%,phenol and formaldehyde removal rate reached almost 100%,BOD5 /COD 0.42,which can meet the requirement of biological treatment.

关 键 词：火山灰 活性炭 浸渍 炭化 催化湿式氧化 

分 类 号：X703.1[环境科学与工程—环境工程]