An insight into the removal of fluoroquinolones in activated sludge process: Sorption and biodegradation characteristics

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	An insight into the removal of fluoroquinolones in activated sludge process: Sorption and biodegradation characteristics
	Wang, Lu; Qiang, Zhimin; Li, Yangang; Ben, Weiwei
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2017-06-01
卷号	56 期号:0 页码:263-271
关键词	Fluoroquinolones Sorption Biodegradation Activated Sludge
英文摘要	The detailed sorption steps and biodegradation characteristics of fluoroquinolones (FQs) including ciprofloxacin, enrofloxacin, lomefloxacin, norfloxacin, and ofloxacin were investigated through batch experiments. The results indicate that FQs at a total concentration of 500 mu g/L caused little inhibition of sludge bioactivity. Sorption was the primary removal pathway of FQs in the activated sludge process, followed by biodegradation, while hydrolysis and volatilization were negligible. FQ sorption on activated sludge was a reversible process governed by surface reaction. Henry and Freundlich models could describe the FQ sorption isotherms well in the concentration range of 100-300 mu g/L. Thermodynamic parameters revealed that FQ sorption on activated sludge is spontaneous, exothermic, and enthalpy-driven. Hydrophobicity-independent mechanisms determined the FQ sorption affinity with activated sludge. The zwitterion of FQs had the strongest sorption affinity, followed by cation and anion, and aerobic condition facilitated FQ sorption. FQs were slowly biodegradable, with long half-lives (>100 hr). FQ biodegradation was enhanced with increasing temperature and under aerobic condition, and thus was possibly achieved through co-metabolism during nitrification. This study provides an insight into the removal kinetics and mechanism of FQs in the activated sludge process, but also helps assess the environmental risks of FQs resulting from sludge disposal. (C) 2016 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39665]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
推荐引用方式 GB/T 7714	Wang, Lu,Qiang, Zhimin,Li, Yangang,et al. An insight into the removal of fluoroquinolones in activated sludge process: Sorption and biodegradation characteristics[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2017,56(0):263-271.
APA	Wang, Lu,Qiang, Zhimin,Li, Yangang,&Ben, Weiwei.(2017).An insight into the removal of fluoroquinolones in activated sludge process: Sorption and biodegradation characteristics.JOURNAL OF ENVIRONMENTAL SCIENCES,56(0),263-271.
MLA	Wang, Lu,et al."An insight into the removal of fluoroquinolones in activated sludge process: Sorption and biodegradation characteristics".JOURNAL OF ENVIRONMENTAL SCIENCES 56.0(2017):263-271.