摘要
以红枣核为原料,Zn Cl2为活化剂制备了活性炭,研究了其对苯酚的吸附性能。采用低温氮气吸附脱附及FTIR等手段对活性炭的性能进行表征。结果表明:制备所得活性炭收率为42.1%,碘吸附值为1 086 mg·g^(-1),BET比表面积达1 096 m2·g^(-1),总孔容为0.603 cm3·g^(-1),平均孔径为2.200 nm,活性炭表面具有羟基、羧基等活性基团。通过Langmuir、Freundlich、Redlich-Peterson、Toth和Temkin等吸附等温模型对数据进行拟合,表明Redlich-Peterson和Toth 3参数模型能较好地描述苯酚在活性炭上的吸附平衡。动力学研究表明枣核基活性炭对苯酚的吸附过程符合二级吸附动力学方程。
Activated carbon was prepared from jujube stone by Zn Cl2 activation,and its adsorption of phenol was studied. The activated carbon was characterized by nitrogen adsorption and FT-IR spectroscopy. The results showed that the BET surface area,total pore volume,and average diameter of the activated carbon were1 096 m2·g^-1,and 0. 603 cm3·g^-1,and 2. 200 nm,respectively. Activation groups like hydroxyl,carboxyl,etc. exist on the activated carbon surface. The equilibrium results were fitted by the Langmuir,Freundlich,Temkin,Redlich-Peterson,and Toth models,and the Redlich-Peterson and Toth models successfully described the adsorption equilibrium of phenol on activated carbons. The kinetic studies showed that the adsorption process follows a pseudo-second-order kinetic model.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第12期7030-7034,共5页
Chinese Journal of Environmental Engineering
基金
陕西省教育厅专项科研计划项目(15JK1835)
陕西省教育厅重点实验室科研计划基金资助项目(13JS123)
关键词
苯酚
活性炭
吸附
动力学
phenol
activated carbon
adsorption
kinetics
