Complexation between Hg(II) and biofilm extracellular polymeric substances: An application of fluorescence spectroscopy

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)

	Complexation between Hg(II) and biofilm extracellular polymeric substances: An application of fluorescence spectroscopy
	Zhang ; Daoyong ; Pan ; Xiangliang ; Mostofa ; Khan M. G. ; Chen ; Xi ; Mu ; Guijin ; Wu ; Fengchang ; Liu ; Jing ; Song ; Wenjuan ; Yang ; Jianying ; Yanli ; Fu ; Qinglong
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2010
卷号	175 期号:40546 页码:359-365
关键词	DISSOLVED ORGANIC-MATTER ACTIVATED SLUDGES HUMIC SUBSTANCES COPPER COMPLEXATION ANAEROBIC SLUDGE SURFACE WATERS LAKE BIWA EPS CADMIUM BINDING
ISSN号	0304-3894
通讯作者	Pan, XL, Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Xinjiang, Peoples R China
中文摘要	The three-dimensional excitation emission matrix (EEM) fluorescence spectroscopy was employed to investigate the interaction of extracellular polymeric substances (EPS) from natural biofilm with Hg(II). The EEM spectra demonstrated that EPS with molecular weight over 14 kDa had two protein-like fluorescence peaks. The fluorescence intensity at both peaks was strongly dependent on the solution pH in the absence and presence of Hg(II), with the maximal fluorescence intensity at neutral pH. Fluorescence of both protein-like peaks was significantly quenched by Hg(II). The values of conditional stability constants (log K-a = 3.28-4.48) derived from modified Stern-Volmer equation are approximate to those for humic substances and dissolved organic matter (DOM). indicating that fluorescent components in EPS have strong binding capacity for Hg(II). Our findings suggest that EPS from biofilm is a class of important organic ligands for complexation with Hg(II) and may significantly affect the chemical forms, mobility, bioavailability and ecotoxicity of heavy metals in the aquatic environment. (C) 2009 Elsevier B.V. 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/365004/9994]
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	Zhang,Daoyong,Pan,et al. Complexation between Hg(II) and biofilm extracellular polymeric substances: An application of fluorescence spectroscopy[J]. JOURNAL OF HAZARDOUS MATERIALS,2010,175(40546):359-365.
APA	Zhang.,Daoyong.,Pan.,Xiangliang.,Mostofa.,...&Qinglong.(2010).Complexation between Hg(II) and biofilm extracellular polymeric substances: An application of fluorescence spectroscopy.JOURNAL OF HAZARDOUS MATERIALS,175(40546),359-365.
MLA	Zhang,et al."Complexation between Hg(II) and biofilm extracellular polymeric substances: An application of fluorescence spectroscopy".JOURNAL OF HAZARDOUS MATERIALS 175.40546(2010):359-365.