太原理工大学学报2018，Vol.49Issue(1)：67-72,6.DOI:10.16355/j.cnki.issn1007-9432tyut.2018.01.011
NaClO改性ACFs对水中铜的吸附动力学和热力学研究
Study on the Adsorption Kinetics and Thermodynamics of Copper on NaClO Modified Activated Carbon Fiber
摘要
Abstract
The surface of activated carbon fibers (ACFs) was modified by using sodium hypo chlorite in present work to improve the acidic groups on the surface and the removal efficiency of heavy metal ions in water.The adsorption time and temperatures affecting the removal rate of copper(Ⅱ) were analyzed,and results indicate that adsorption equilibrium was obtained within 50 minutes and the removal rate increased with increasing temperature.It can be concluded from the fitting results of pseudo-first-order and pseudo-second-order kinetic models that the pseudosecond-order kinetic model satisfactorily correlated the experimental data,with R2 larger than 0.99.Fitting results of intraparticle diffusion model show that the adsorption process was controlled by liquid film diffusion and intra-particle diffusion.In addition,the thermodynamic data suggest that the adsorption process was endothermic and could occur spontaneously.The adsorption activation energy is 20.48 kJ/mol,revealing that it belong to physics adsorption.The removal of copper(Ⅱ) ions in water using modified ACFs is significantly higher than that using ACFs,showing an increase from 70.2％ to 94.5％.关键词
活性炭纤维/次氯酸钠改性/Cu(Ⅱ)/吸附动力学/吸附热力学Key words
activated carbon fiber/sodium hypochlorite modification/copper(Ⅱ)/adsorption kinetic/adsorption thermodynamics分类
化学化工引用本文复制引用
路晏红,祝方,姜雪梅..NaClO改性ACFs对水中铜的吸附动力学和热力学研究[J].太原理工大学学报,2018,49(1):67-72,6.基金项目
山西省基础研究计划项目:微波辅助反相乳液法合成镉离子印迹聚合物及其性能研究(2013011040-1) （2013011040-1）
