摘要
以工业规模的废轮胎热解炭黑为原料,经过水蒸汽活化制备废轮胎活性炭,采用间歇实验法考察了废轮胎活性炭对阴离子染料甲基橙的吸附性能.系统研究了吸附过程的平衡、动力学及热力学性质.考察了操作因素,如接触时间、溶液pH、吸附剂用量、甲基橙初始浓度以及温度等对吸附过程的影响.研究结果表明,废轮胎活性炭是甲基橙的有效吸附剂,其吸附容量高于商用活性炭以及文献报道的相关吸附剂.吸附平衡符合Langmuir等温线,吸附动力学过程与假二级动力学模型相符;热力学研究表明,该吸附过程为吸热、自发进行的物理吸附.
Pyrolytic tire char in an industrial scale was activated by steam and its potential ability to adsorb methyl orange （MO） was investigated by a batch method. Systematic research was performed on the equilibrium, kinetics and thermodynamic properties of the adsorption.＇ The effect of contact time, pH, adsorbent dosage, initial concentration and temperature on the adsorption was also investigated to provide more information about the adsorption characteristics of the activated pyrolytic tire char （APTC）. It has shown that APTC is a potential adsorbent for MO removal with higher adsorption capacity than commercial activated carbon and most adsorbents reported in relevant literature. The adsorption equilibrium data obeyed Langmuir isotherm and the kinetic data were well described by the pseudo-second order kinetic model. The adsorption followed intraparticle diffusion model with more than one process affecting the adsorption. Thermodynamic study confirmed that the studied adsorption process is a physisorption process with endothermic, random and feasible characteristics.
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第3期1-12,共12页
Acta Scientiarum Naturalium Universitatis Nankaiensis
基金
Supported by National Key Technologies R&D Program of China(2006BAC02A12)
Key Technologies R&D Program of Tianjin China(07ZCGYSH02000)
Natural Science Foundation of Tianjin China(08JCZDJC21400)
关键词
废轮胎活性炭
甲基橙
吸附等温线
动力学
热力学
activated pyrolytic tire char
methyl orange
adsorption isotherm
kinetics
thermodynamics
