Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 水污染控制实验室

	Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances
	Ruan, Xiaodong ; Li, Lin ; Liu, Junxin
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
	2013
卷号	25 期号:5 页码:916-924
通讯作者	Liu, JX
中文摘要	Aluminum flocculant can enhance the flocculating performance of activated sludge. However, the binding mechanism of aluminum ion (Al3+) and extracellular polymeric substances (EPS) in activated sludge is unclear due to the complexity of EPS. In this work, three-dimensional excitation emission matrix fluorescence spectroscopy (3DEEM), fluorescence quenching titration and Fourier transform infrared spectroscopy (FT-IR) were used to explore the binding behavior and mechanism between Al3+ and EPS. The results showed that two fluorescence peaks of tyrosine- and tryptophan-like substances were identified in the loosely bound-extracellular polymeric substances (LB-EPS), and three peaks of tyrosine-, tryptophan- and humic-like substances were identified in the tightly bound-extracellular polymeric substances (TB-EPS). It was found that these fluorescence peaks could be quenched with Al3+ at the dosage of 3.0 mg/L, which demonstrated that strong interactions took place between the EPS and Al3+. The conditional stability constants for Al3+ and EPS were determined by the Stern-Volmer equation. As to the binding mechanism, the -OH, N-H, C=O, C-N groups and the sulfur- and phosphorus-containing groups showed complexation action, although the groups in the LB-EPS and TB-EPS showed different behavior. The TB-EPS have stronger binding ability to Al3+ than the LB-EPS, and TB-EPS play an important role in the interaction with Al3+.
收录类别	SCI
WOS记录号	WOS:000319635900009
公开日期	2014-06-06
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/7358]
专题	生态环境研究中心_水污染控制实验室
推荐引用方式 GB/T 7714	Ruan, Xiaodong,Li, Lin,Liu, Junxin. Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2013,25(5):916-924.
APA	Ruan, Xiaodong,Li, Lin,&Liu, Junxin.(2013).Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,25(5),916-924.
MLA	Ruan, Xiaodong,et al."Flocculating characteristic of activated sludge flocs: Interaction between Al3+ and extracellular polymeric substances".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 25.5(2013):916-924.