磁性活性炭对水体中磺胺嘧啶钠的吸附机理研究  

Investigation into the Adsorption Mechanism of Sulfadiazine Sodium in Aqueous Solution Using Magnetic Biochar

作　　者：邹卫华[1] 刘鹏磊 刘秋节 马培丽 ZOU Weihua;LIU Penglei;LIU Qiujie;MA Peili(School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学化工学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2020年第4期92-96,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省基础与前沿技术研究计划项目(162300410016)。

摘　　要：以沙柳为原料,通过一步热解制备了磁性活性炭(MBC),研究了其对水中磺胺嘧啶钠(SAS)的吸附行为。考察了吸附时间、溶液浓度、pH值、盐离子浓度等因素对吸附效果的影响。结果显示,磁性活性炭对磺胺嘧啶钠的吸附量在298 K时达到248.4 mg/g,吸附动力学符合Elovich模型,整个吸附过程为膜扩散和内扩散共同控制。吸附热力学符合Freundlich和Koble-Corrigan模型。由机理分析可知,MBC与SAS之间存在疏水作用、氢键、π-π电子共轭等作用力。In this paper,magnetic biochar prepared from salix mongolica by a one-step method was used for sulfadiazine sodium removal from aqueous solution.The effects of initial concentration,adsorption time,pH and salt ion concentration on the adsorption were investigated.The results showed the maximum adsorption capacity of MBC for SAS was 248.4 mg/g at 298 K.The adsorption kinetics was best described by Elovich model and the whole adsorption process was controlled by both film diffusion and intraparticle diffusion.The equilibrium data was best fitted by the Freundlich and Koble-Corrigan models.The interaction of theπ-πdispersion,the hydrophobic interaction and hydrogen bonding played a role in the adsorption of sulfadiazine sodium onto magnetic biochar.

关 键 词：沙柳 磁性活性炭 吸附 磺胺嘧啶钠 吸附机理 

分 类 号：X703[环境科学与工程—环境工程]