Adsorption mechanisms and impact factors of oxytetracycline on activated sludge

2nd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Xiancai, Song^1,2 ; Dongfang, Liu^2 ; Lejun, Zhao^1

Tianjin Municipal Engineering Design and Research Institute, Yingkou road, 239, Tianjin

300051, China^1

School of Nankai University, Weijin road 94, Tianjin

300071, China^2

关键词: Adsorption ability;    Adsorption mechanism;    Adsorption process;    Cationic exchange;    Chemical adsorption;    Oxytetracyclines (OTC);    Pseudo-second-order kinetic models;    Surface complexation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/59/1/012068/pdf
DOI  :  10.1088/1755-1315/59/1/012068

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The adsorption mechanisms and the effect of Oxytetracycline (OTC) onto activated sludge were studied. The results show that the adsorption of Oxytetracycline (OTC) onto activated sludge was coincident with the Pseudo-second-order kinetic model which suggested that chemical adsorption mechanism was dominant. The influences including pH and metal ions on the OTC were examined. It was demonstrated that the adsorption process was highly pH-dependant, which indicate that cationic exchange mechanisms may play an important role in the adsorption process. Na+, K+, Ca2+, Mg2+and Cd2+ions more or less inhibited the adsorption of OTC on activated sludge while Cu2+enhanced the adsorption ability. The phenomenon may reflect the result that a surface complexation mechanism could involved in the adsorption.