污泥活性炭对次甲基蓝废水的吸附  

Adsorption of methylene blue dye wastewater by sludge based activated carbon

作　　者：李依丽[1] 李利平[1] 尹晶[1] 梁文俊[1] 李坚[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《环境工程学报》2013年第8期3059-3064,共6页Chinese Journal of Environmental Engineering

基　　金：2010年北京市教委项目(KM201010005013)

摘　　要：立足于污泥的资源化,利用化学活化法制得的污泥基活性炭,处理次甲基蓝染料废水。考察了污泥活性炭的粒径以及染料废水的pH值对染料脱色效果以及活性炭的吸附量的影响,并对吸附过程进行等温吸附线和吸附动力学分析。结果表明,在本研究的范围内,污泥活性炭的粒径越小、染料废水的pH值越高,则污泥活性炭对染料废水的吸附效果越好。当粒径在200目以上时,去除率及吸附量分别为88.2%和136.7 mg/g;当pH值为11时,去除率和吸附量分别为90.4%和91.9 mg/g。污泥活性炭对次甲基蓝染料的吸附脱除符合Langmuir吸附等温线和Lagergren准二级动力学方程。The activated carbon prepared by chemical activation based on sludge was use to treat methylene blue dye wastewater.The effects of grain size of activated carbon based on sludge and pH of the solution of methylene blue dye wastewater on removal rate of dye were observed.The process of adsorption was analyzed by adsorption isotherms and kinetics.The results showed that,the smaller particle size of sludge activated carbon and higher pH value of dye wastewater,the better adsorption effect gained by sludge based activated carbon on dye wastewater.When the particle size was bigger than 200 meshes,the removal efficiency and the adsorption amount were 88.2% and 136.7 mg/g,respectively.When the pH value was 11,the removal efficiency and the adsorption amount were 90.4% and 91.9 mg/g,respectively.The adsorption process can be well described by Langmuir isotherms and Pseudo-second-order rate equation was found to interpret the kinetic data suitably.

关 键 词：污泥 活性炭 次甲基蓝 吸附 

分 类 号：X703[环境科学与工程—环境工程]