Binding of dicamba to soluble and bound extracellular polymeric substances (EPS) from aerobic activated sludge: A fluorescence quenching study

CORC > 新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所 > 中国科学院新疆生态与地理研究所(2010年以前数据)

	Binding of dicamba to soluble and bound extracellular polymeric substances (EPS) from aerobic activated sludge: A fluorescence quenching study
	Pan ; Xiangliang ; Liu ; Jing ; Zhang ; Daoyong ; Chen ; Xi ; Song ; Wenjuan ; Wu ; Fengchang
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2010
卷号	345 期号:2 页码:442-447
关键词	BOVINE SERUM-ALBUMIN DISSOLVED ORGANIC-MATTER ANAEROBIC SLUDGE HUMIC ACIDS SPECTROSCOPY ADSORPTION EXTRACTION EXCITATION LIGANDS
ISSN号	0021-9797
通讯作者	Zhang, DY, Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China
中文摘要	Binding of dicamba to soluble EPS (SEPS) and bound EPS (BEPS) from aerobic activated sludge was investigated using fluorescence spectroscopy. Two protein-like fluorescence peaks (peak A with Ex/Em = 225 nm/342-344 nm and peak B with Ex/Em = 275/340-344 nm) were identified in SEPS and BEPS. Humic-like fluorescence peak C (Ex/Em = 270-275 nm/450-460 nm) was only found in BEPS. Fluorescence of the peaks A and B for SEPS and peak A for BEPS were markedly quenched by dicamba at all temperatures whereas fluorescence of peaks B and C for BEPS was quenched only at 298 K. A dynamic process dominated the fluorescence quenching of peak A of both SEPS and BEPS. Fluorescence quenching of peak B and C was governed a static process. The effective quenching constants (log K-a) were 4.725-5.293 for protein-like fluorophores of SEPS and 4.23-5.190 for protein-like fluorophores of BEPS, respectively. Log K-a for humic-like substances was 3.85. Generally, SEPS had greater binding capacity for dicamba than BEPS, and protein-like substances bound dicamba more strongly than humic-like substances. Binding of dicamba to SEPS and BEPS was spontaneous and exothermic. Electrostatic force and hydrophobic interaction forces play a crucial role in binding of dicamba to EPS. (C) 2010 Elsevier Inc. All rights reserved..
学科主题	生物化学与分子生物学
收录类别	SCI
公开日期	2011-08-19
内容类型	期刊论文
源URL	[http://ir.xjlas.org/handle/365004/9968]
专题	新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据)
推荐引用方式 GB/T 7714	Pan,Xiangliang,Liu,et al. Binding of dicamba to soluble and bound extracellular polymeric substances (EPS) from aerobic activated sludge: A fluorescence quenching study[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2010,345(2):442-447.
APA	Pan.,Xiangliang.,Liu.,Jing.,Zhang.,...&Fengchang.(2010).Binding of dicamba to soluble and bound extracellular polymeric substances (EPS) from aerobic activated sludge: A fluorescence quenching study.JOURNAL OF COLLOID AND INTERFACE SCIENCE,345(2),442-447.
MLA	Pan,et al."Binding of dicamba to soluble and bound extracellular polymeric substances (EPS) from aerobic activated sludge: A fluorescence quenching study".JOURNAL OF COLLOID AND INTERFACE SCIENCE 345.2(2010):442-447.