摘要
对未改性的和用丹宁酸、柠檬酸改性的活性炭吸附水溶液中铜离子进行了系统的实验研究,探讨了接触时间、溶液pH等对除铜效果的影响。根据动力学、热力学方程对实验数据进行处理。结果表明,本实验较好地符合Freundlich吸附等温式,吸附过程遵循准一级动力学模型和准二级动力学模型,在pH 2～7之间吸附剂量随pH升高而增加。
Studies were made on the Cu2＋ adsorption by unmodified active carbon and two kinds of modified active carbon from aqueous solutions of tannic and citric acids.In addition,the effect of other parameters,such as solution pH and contact time,on the sorption capacities was also discussed.According to the kinetic equation and thermodynamics equation we analyzed the data in the experiment.Results showed that the data obtained in this study followed the Freundlich isotherm,the pseudo-first and pseudo-second kinetic models.The adsorption capacities increased with the rise of the pH.
出处
《淮海工学院学报（自然科学版）》
CAS
2011年第3期31-34,共4页
Journal of Huaihai Institute of Technology:Natural Sciences Edition
关键词
活性炭
吸附
铜离子
丹宁酸
柠檬酸
修饰
active carbon
adsorption
Cu2＋
tannic acid
citric acid
modification
