萘在炭质吸附剂上的静态吸附机理  

Static Adsorption Mechanism of Naphthalene on Carbonaceous Sorbents

作　　者：周宏仓[1] 蔡华侠[1] 薛鸿斌[1] 宋园园[1] 张翠翠[1] 陆建刚[1] 

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044

出　　处：《环境科学研究》2010年第5期658-662,共5页Research of Environmental Sciences

基　　金：国家自然科学基金项目(50608040);教育部留学回国人员科研启动基金资助项目;江苏省科技支撑计划(工业)项目(BE20090165);2006年江苏省高校"青蓝工程"优秀青年骨干教师资助项目

摘　　要：通过分析考察试验吸附等温线与Langmuir,BET和Freundlich模型的拟合结果,以及吸附剂的结构参数(比表面积、总孔容积、平均孔径),对萘(Nap)在3种活性炭吸附剂上的静态吸附行为进行了研究.结果表明:3种活性炭吸附剂对萘均表现出良好的吸附能力(吸附量最高可达0.231 1 g/g),改性后活性炭颗粒吸附性能要明显优于原活性炭;萘在活性炭颗粒(AC-a,AC-c)和活性炭粉末(AC-b)上的吸附行为存在差异,在活性炭颗粒上表现为单分子层吸附的过程,而在具有突出比表面积的活性炭粉末上,吸附过程表现出多分子层吸附的特征.Langmuir和BET模型可以分别对萘在活性炭颗粒和粉末上的静态吸附行为进行合理的预测.The aim of this paper is to study the static adsorption behaviors of two-ring PAHs,Naphthalene,to three carbon materials,granular AC（AC-a and AC-c） and pulverized AC（AC-b）.For this purpose,the fitting results of three kinds of adsorption isotherm models,such as Langmuir,BET and Freundlich,were analyzed,and the relation between textural parameters of sorbents（surface area,pore volume,and pore diameter） and adsorption capacity was also investigated.Experimental results show that three activated carbons（AC） used in this work show a good adsorption capacity to Naphthalene（Nap）,with a maximum achieved adsoption of 0.2311 g/g.The adsorption capacity of modified AC（AC-c） is superior to the original AC（AC-a）.From the analyzed experimental isotherm,a different adsorption behavior between granular AC and pulverized AC was found.Monolayer adsorption occurs on granular AC,and multilayer adsorption dominates on pulverized AC,which has a remarkable surface area.Furthermore,the static adsorption behaviors of Nap on granular AC and pulverized AC can be predicted by the Langmuir and BET models.

关 键 词：萘 活性炭 静态吸附机理 

分 类 号：X511[环境科学与工程—环境工程]