Thermodynamics of the interaction between antibiotics and extracellular polymeric substances within activated sludge

doi:10.1080/09593330.2018.1426635

	Thermodynamics of the interaction between antibiotics and extracellular polymeric substances within activated sludge
	Zhang, Cheng-Cheng 1; Guo, Jin-Song1,2 ; Chen, You-Peng 1,2; Ji, Fang-Ying 1; Wang, Jing 3; Yan, Peng1,2 ; Bai, Yun 4
刊名	ENVIRONMENTAL TECHNOLOGY
	2019-05-25
卷号	40 期号:12 页码:1525-1533
关键词	Extracellular polymeric substances antibiotics thermodynamics isothermal titration calorimetry activated sludge
ISSN号	0959-3330
DOI	10.1080/09593330.2018.1426635
通讯作者	Ji, Fang-Ying(jfytougao@163.com) ; Yan, Peng(yanpengstu@163.com)
英文摘要	The removal of antibiotics in biological wastewater treatment plants (WWTPs) has attracted an ever-increasing interest. Extracellular polymeric substances (EPS) play a crucial role in antibiotics' bio-adsorption using activated sludge, but the interaction mechanism between antibiotics and EPS remains unclear. In this study, the thermodynamics of interactions between EPS and antibiotics (acetaminophen (ACT) and sulfamethazine (SMZ)) were investigated via isothermal titration calorimetry (ITC). The results show that the extracellular proteins strongly combined with ACT and SMZ, and the binding process depended on entropy driven by the hydrophobic interaction as the main driving force. Environmental conditions have a significant impact on the adsorption performance. Therefore, binding of antibiotics and EPS at different pH and ionic strength were investigated to determine the optimal pH and ionic strength. At the near-neutral condition of pH 6.8, the binding reaction of EPS and antibiotics was the most favorable and the conformational change was the maximal. Ionic strength has an obvious effect on the interaction between EPS and antibiotics. The results of this study provided a better understanding of the interaction between antibiotics and EPS in the WWTPs. [GRAPHICS] .
资助项目	National Natural Science Foundation of China[51508546] ; National Natural Science Foundation of China[51578527] ; National Research Base of Intelligent Manufacturing Service[KFJJ2016037] ; Science and Technology Plan of Ministry of Housing and Urban-Rural Development of China[2016-K4-034]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000462854100004
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/7637]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Ji, Fang-Ying; Yan, Peng
作者单位	1.Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm MO, Chongqing 400045, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Chongqing Jianzhu Coll, Chongqing, Peoples R China 4.Chongqing Technol & Business Univ, Natl Res Base Intelligent Mfg Serv, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Cheng-Cheng,Guo, Jin-Song,Chen, You-Peng,et al. Thermodynamics of the interaction between antibiotics and extracellular polymeric substances within activated sludge[J]. ENVIRONMENTAL TECHNOLOGY,2019,40(12):1525-1533.
APA	Zhang, Cheng-Cheng.,Guo, Jin-Song.,Chen, You-Peng.,Ji, Fang-Ying.,Wang, Jing.,...&Bai, Yun.(2019).Thermodynamics of the interaction between antibiotics and extracellular polymeric substances within activated sludge.ENVIRONMENTAL TECHNOLOGY,40(12),1525-1533.
MLA	Zhang, Cheng-Cheng,et al."Thermodynamics of the interaction between antibiotics and extracellular polymeric substances within activated sludge".ENVIRONMENTAL TECHNOLOGY 40.12(2019):1525-1533.