介孔氧化铝的制备及其对As^(5+)的吸附性能研究  

Preparation and As^(5+) adsorption performance of mesoporous alumina

作　　者：韩彩芸[1] 陈荟蓉[1] 张黎明[1] 单鑫[1] 朱文杰[1] 罗永明[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650500

出　　处：《功能材料》2016年第1期1117-1121,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(U1402233;51068010);云南省自然科学基金资助项目(KKSY201422060);云南省教育厅资助项目(2013Y326;2014Y077)

摘　　要：以异丙醇铝为铝源,非离子表面活性剂P123为模板剂,采用溶胶-凝胶法于室温下制备出介孔氧化铝,并研究了该介孔氧化铝对As^(5+)的吸附性能。就材料焙烧温度、初始pH值、接触时间、吸附剂量和吸附温度对吸附性能的影响进行探讨。结果表明,介孔氧化铝对As^(5+)的吸附性能随材料焙烧温度的升高而降低;随吸附温度的升高吸附速率加快,吸附平衡时间缩短;吸附性能受溶液pH值影响较大,pH值=4.5时吸附容量达到最大,此时最大单分子层吸附容量为51.02mg/g。Mesoporous alumina was prepared by the method of sol-gel under room temperature via nonionic surfactant pluronic P123 and aluminium tri-isopropoxide as the template and aluminium source,respectively.And the obtained mesoporous alumina was employed to remove As^(5+) from aqueous solution.Various parameters such as calcination temperature of mesoporous alumina,initial pH of As^(5+) solution,contact time,adsorbent dosage and adsorption temperature were investigated.It could be seen that As^(5+) uptake decreased with the increased in calcination temperature of mesoporous alumina.The adsorption performance was influenced by the initial pH,and the maximum adsorption capacity was reached at pH=4.5,which calculate from Langmuir isotherm was 51.02mg/g.

关 键 词：氧化铝 介孔 吸附 吸附量 As^5+ 

分 类 号：TB332[一般工业技术—材料科学与工程]