摘要
阳离子改性硅藻土作为吸附剂,对活性染料溶液进行吸附动力学和热力学研究。吸附动力学研究结果,表明改性硅藻土吸附剂对活性染料吸附为准二级动力学模型。吸附过程受到内扩散及其他因素共同影响。染料溶液pH值影响改性硅藻土吸附过程,改性硅藻土在弱碱性条件下吸附效果较好。恒温吸附过程吸附符合Langmuir吸附模型,吸附过程为吸热熵增过程。
Cationic modified diatomite was used as adsorbent to remove the dyes. The adsorption kinetics and thermodynamics were investigated. The experiment results showed that the adsorption kinetics of modified diatomite were fitted well with pseudo - second- order kinetic model. Adsorption process was affected several mechanisms such as the internal diffusion. PH of dye solution affected the adsorption process, the weak alkali solution could be beneficial to the adsorption process. Isothermal adsorption data were fitted to Langmuir isotherms. The adsorption reaction was endothermic and incremental enthalpy process.
作者
杨樨子
孙德帅
魏展
刘馨
Yang Xizi Sun Deshuai Wei Zhan Liu Xin(College of Chemical and Engineering, Qingdao University, Qingdao 266071, China)
出处
《山东化工》
CAS
2017年第1期20-23,共4页
Shandong Chemical Industry
关键词
改性硅藻土
活性染料
吸附
动力学
热力学
modified diatomite
reactive dyes
adsorption
kinetics
thermodynamics
