炭化柚子皮对废水中双酚A的吸附  

Adsorption of bisphenol-A by using carbonized pomelo peel

作　　者：曾荣英[1] 唐文清[1] 冯泳兰[1] 刘梦琴[1] 黄波[1] 吴安富[1] 

机构地区：[1]衡阳师范学院化学与材料科学系,衡阳421008

出　　处：《环境工程学报》2013年第10期3797-3801,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51078128);湖南省自然科学基金资助项目(13JJ9018);湖南省重点建设学科资助

摘　　要：采用磷酸二氢钾活化原材料柚子皮,分别在300℃和600℃对活化后柚子皮进行炭化,制得吸附剂(CC300和CC600),通过静态吸附实验研究了炭化柚子皮对双酚A的吸附性能。采用比表面积分析仪对炭化柚子皮进行表征,实验考察了pH值、吸附时间和温度对双酚A吸附的影响,并详细研究了炭化柚子皮对双酚A的吸附行为和机理。结果表明,高温炭化柚子皮(CC600)吸附双酚A能力比低温炭化(CC300)的强,其吸附较好地满足Langmuir和Freundlich等温方程;动力学研究表明,其吸附速率快,在150 min内能达到吸附平衡,准二级动力学模型较好地描述该吸附行为,相关系数高达0.99;计算了热力学参数ΔG、ΔH和ΔS的值,△G为负值,说明该吸附过程为自发过程。Activated carbon prepared from pomelo peel using monopotassium phosphate as an activator at 300℃ and 600℃ was utilized as adsorbent（CC300 and CC600） to remove bisphenol-A from aqueous solution. The carbonized pomelo peel was characterized by Brunauer-Emmett-Teller （BET） analysis. Batch experiments were conducted to study the effects of pH, adsorption time, and temperature on bisphenol-A adsorption. The re- sults showed that the CC600 sample had greater adsorption efficiency than the CC300. The Langmuir and Freun- dlich models were applied to describe the adsorption isotherms of the bisphenol-A. Kinetic studies showed that the adsorptions were fast, in that all of the adsorption equilibria were reached within 150 min, and that the ad- sorption processes followed a pseudo-second-order kinetic model. The thermodynamic parameters △G, △H and △S were also calculated. The negative AG values indicated that all of the adsorption processes were spontaneous.

关 键 词：炭化柚子皮(CC300和CC600) 双酚A 吸附等温方程 动力学 热力学 

分 类 号：X703.1[环境科学与工程—环境工程]