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	Thermochemical mechanism of the interaction between sulfamethazine antibiotics and extracellular polymers
	Wang, Jing1; Zhang, Cheng-Cheng2; Ji, Fang-Ying2; Yan, Peng3
	2017
摘要	Thermodynamic parameters of interactions between extracelluar polymeric substances (EPS) and sulfamethazine antibiotics were investigated by isothermal titration calorimetry (ITC) in this study. Results showed that extracellular proteins strongly combined with sulfamethazine (SMZ), and the binding process depended on entropy driven by the hydrophobic interaction as the main driving force. The binding was significantly affected by pH and ionic strength. The binding of EPS and SMZ and the conformational change was the most favorable and the maximal, respectively, at the condition of pH 6.8. The ionic strength had a significant effect on the interaction between EPS and SMZ. The results implied that EPS contained in activated sludge may had a significant influence on the fate of antibiotics in water environment. © 2017, Editorial Board of China Environmental Science. All right reserved.
发表期刊	Zhongguo Huanjing Kexue/China Environmental Science
ISSN	10006923
卷号	37期号:10页码:3758-3763
通讯作者	Ji, Fang-Ying (jfy@cqu.edu.cn)
收录类别	EI
语种	中文