杏壳活性炭对低浓度苯酚模拟废水的吸附行为研究  

THE ADSORPTION BEHAVIOR OF LOW PHENOL CONCENTRATION WASTEWATER BYALMOND-BASED ACTIVATED CARBON

作　　者：杨继亮[1] 岳贤田[1] YANG Ji-liang;YUE Xian-tian(Chaohu College,Chaohu Anhui 238000)

机构地区：[1]巢湖学院,安徽巢湖238000

出　　处：《巢湖学院学报》2018年第6期42-47,共6页Journal of Chaohu University

基　　金：巢湖学院科研启动经费项目(项目编号:KYQD-201602);巢湖学院校级科学研究项目(项目编号:XLY-201607)

摘　　要：以杏壳活性炭为吸附剂,对低浓度苯酚模拟废水进行平衡吸附实验,并对实验数据进行Langmuir吸附等温模型、Freundlich吸附等温模型、准一级动力学模型、准二级动力学模型和颗粒内扩散模型拟合。结果表明:吸附平衡数据能用Langmuir方程描述。在低浓度条件下,随着温度的增加,其平衡吸附量降低,而在较高浓度下,杏壳活性炭对苯酚的吸附能力同时受到温度及吸附质分子的"吸附-脱附"平衡状态的影响。杏壳活性炭对低浓度苯酚模拟废水的吸附过程符合准二级动力学模型,化学吸附为吸附速率控制步骤。The almond-based activated carbon was used as adsorbent for treating low phenol concentration wastewater;the adsorption equilibrium experiments data were fitted with Langmuir,Freundlich,pseudo-first order and pseudo-second order equations.The results showed that adsorption equilibrium data fit Langmuir model.Equilibrium adsorption capacity decreased with the increasing temperature in low concentration.However,it related to"adsorption-desorption"balance when phenol concentration was higher.The adsorption process could be described by pseudo-second order kinetic model well,and chemical adsorption was the rate-limiting step.

关 键 词：活性炭 苯酚 吸附 动力学 

分 类 号：X703[环境科学与工程—环境工程]