花生壳活性炭对溶液中亚甲基蓝和亮绿的吸附  

Adsorption of Methylene Blue and Brilliant Green on Activated Carbon Derived from Peanut Hull

作　　者：刘金芝[1] 贾兴涛[1] 王慧[1] 盛睿[1] 康琪[1] 

机构地区：[1]山东师范大学化学化工与材料科学学院,山东济南250014

出　　处：《常熟理工学院学报》2010年第2期45-47,68,共4页Journal of Changshu Institute of Technology

基　　金：山东省自然科学基金(No.Y2007B03)资助项目

摘　　要：以磷酸法活化制备的花生壳活性炭是一种廉价、有效的吸附剂,可用于染料溶液吸附脱色.实验测定了亚甲基蓝和亮绿在花生壳活性炭上的吸附特性,结果表明,两种染料在花生壳活性炭上的吸附等温线符合Langmuir等温式,其中亚甲基蓝和亮绿的饱和吸附量分别为596mol/L和528mol/L,吸附平衡常数分别为0.328L/mol和0.103L/mol,吸附过程遵从假二级吸附动力学模型.在亚甲基蓝与亮绿的混合溶液中,当吸附剂的投加量不足时,亚甲基蓝优先吸附.Activated carbon was prepared from peanut hull using chemical activation by phosphoric acid. The prepared activated carbon, a cheap and excellent adsorbent, was used for the adsorption of dyes from solutions. The adsorption of methylene blue （MG） and brilliant green （BG） onto the prepared activated carbon was investigated. The experimental results show that the adsorption of MG and BG obeys Langmuir adsorption isotherm. The saturation amounts of MG and BG adsorbed are 596 and 528 mol/L, respectively. The adsorption equilibrium constants are 0.328 and 0.103L/mol for MG and BG, respectively. The adsorption processes follow the pseudo-second order kinetic model. In mixed solution of MG and BG, MG is preferentially adsorbed in the case of insufficient dosage of adsorbent.

关 键 词：活性炭 花生壳 染料 吸附 

分 类 号：X703.1[环境科学与工程—环境工程]