Adsorption of Tetracycline by Wuhan Lake Sediments

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Zhang, Ao^1 ; Wu, Yixiao^2

Wuhan No.3 Middle School, Wuhan

430050, China^1

School of Resource and Environmental Sciences, Wuhan University, Wuhan

430079, China^2

关键词: Adsorption capacities;    Adsorption characteristic;    Adsorption quantity;    Adsorption reaction;    Calcium ion concentration;    Langmuir adsorption isotherms;    Pseudo second order kinetics;    Weber-Morris model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/5/052057/pdf
DOI  :  10.1088/1757-899X/394/5/052057

来源: IOP

【 摘 要 】

The antibiotic contamination in the environment has attracted people's attention now. The adsorption characteristics of tetracycline (TC) by lake sediments in east lake and south lake of Wuhan city were investigated in this paper. The results showed that the adsorption reactions could reach balance after 13 hours. The effects of pH and calcium ion intensity on the adsorption were significant, and the adsorption capacities decreased with the increase of the pH as well as calcium ion concentration. The increase of initial TC concentration was beneficial to adsorption of TC until reaching 200mg/L. The adsorption process conformed to the pseudo second-order kinetics model and had three steps according to Weber-Morris model. The Langmuir adsorption isotherm could better fit adsorption than Freundlich model. The maximum adsorption quantities were 62.74 and 75.41 mg/L respectively for east lake and south lake at the temperature of 25°C.