摘要
研究了30℃下活性竹炭对苯酚溶液的吸附动力学,考察了苯酚初始浓度和吸附剂粒径的影响,并用三种动力学模型进行了拟合。结果表明:活性竹炭对苯酚的吸附动力学过程可以用准二级模型进行很好的描述,拟合所得的初始吸附速率随着苯酚浓度的增加和竹炭粒径的减小而提高。颗粒内扩散模型分析表明,活性竹炭对苯酚溶液的吸附过程中,颗粒内扩散为主要速率控制步骤。
Dynamic adsorption of phenol at 30 ℃ on activated bamboo charcoal was investigated. Effects of phenol initial concentration and adsorbent size on kinetics were discussed. Three models were used to study the adsorption kinetics. It was found that a pseudo-second-order equation provided the best correlation to the data. The initial adsorption rates derived from the model increased with concentration and decreased with size. An intraparticle diffusion was the rate-controlling step for the adsorption of phenol on activated bamboo charcoal.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2008年第4期326-330,共5页
New Carbon Materials
基金
国家自然科学基金(50672046)
国家重点基础研究发展计划(973计划)课题(9732004CB720601)~~
关键词
活性竹炭
苯酚
吸附动力学
Activated bamboo charcoal
Phenol
Adsorption kinetics
