磁性活性炭对废水中盐酸土霉素的吸附  

Adsorption of oxytetracycline hydrochloride in wastewater by magnetic activated carbon in batch mode

作　　者：韩润平[1] 闻康 李一 肜雅婵 HAN Runping;WEN Kang;LI Yi;RONG Yachan(College of Chemistry,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学化学学院,郑州450001

出　　处：《环境工程学报》2020年第9期2443-2449,共7页Chinese Journal of Environmental Engineering

基　　金：河南省基础与前沿研究项目(142300410224)。

摘　　要：利用磁性材料易分离和活性炭具有良好的吸附性能的特点,制备了磁性活性炭(MAC),研究了其对废水中盐酸土霉素(OTC-HCl)的吸附性能。应用批处理方式,研究了影响MAC吸附性能的因素,并对吸附动力学和等温线进行了分析。酸性条件有利于OTC-HCl的吸附,共存盐的影响小,升温有利于OTC-HCl的吸附。303 K时对OTC-HCl的吸附量达到338 mg·g^−1。模型拟合分析表明,Elovich方程可准确地预测时间对吸附量的影响,Toth和Langmui模型可以描述吸附平衡过程。Elovich方程可以预测解吸时间对解吸量的影响,吸附OTC-HCl的MAC有一定的重复使用性能。以上结果表明,MAC具有良好的吸附能力,可用于废水中土霉素的吸附去除。Based on the easy separation of magnetic materials and good adsorption performance of activated carbon,a type of magnetic activated carbon(MAC)was prepared by co-precipitation and its adsorption property toward oxytetracycline hydrochloride(OTC-HCl)was studied.The batch experiments were conducted to study the impact factors of MAC adsorption ability and analyze the adsorption kinetics and isotherms.The results showed that both acidic conditions and the increase of temperature were in favor of OTC-HCl adsorption,while existence of common salt had slight influence.Adsorption amount reached 338 mg·g^−1 at 303 K.The adsorption equilibrium could be fitted by Langmuir model and Toth model,and Elovich equation could accurately predict the effect of time on adsorption amount and the effect of desorption time on the desorption amount.Furthermore,OTC-HCl-loaded MAC could be regenerated and reused to some extent.MAC is promising to be applied in wastewater treatment due to its good adsorption ability.

关 键 词：吸附 磁性活性炭 盐酸土霉素 模型分析 

分 类 号：X703[环境科学与工程—环境工程]