摘要
采用Bothem滴定法及动态吸附法对柠檬酸、NaOH溶液处理活性炭后其表面化学特征及吸附氨气性能进行了研究.结果表明,柠檬酸、NaOH溶液处理的活性炭有效地增加了表面羧基、酚羟基及内酯基含量,提高活性炭的表面亲水性及表面总酸度,而活性炭吸附氨气穿透时间与其表面酚羟基、内酯基和羧基的总含量呈正比关系.而且,40%柠檬酸溶液处理与45%NaOH溶液处理后活性炭吸附氨气穿透时间分别增长2倍及5倍.
Chemical characteristics and adsroption properties onto amonia of modified activated carbon are studied by using Bothem＇s titration and dynamic adsorption method. The test results show that activated carbon modified by citric acid and NaOH can increase the content of surface acidic functional group,increase surface hydrophilicity and total acidity of activated carbor. Moreover, saturated time of activated carbon modified by 45% NaOH solution is significantly greater than that of activated carbon treated by citric acid.
出处
《纺织高校基础科学学报》
CAS
2009年第3期386-389,共4页
Basic Sciences Journal of Textile Universities
关键词
活性炭
改性
官能团
吸附
activated carbon
modification
functional group
adsorption
