Effects of extraction procedures on metal binding properties of extracellular polymeric substances (EPS) from anaerobic granular sludges

被引：72
|
作者：
d'Abzac, Paul [1 ]
Bordas, Francois [1 ]
van Hullebusch, Eric [2 ]
Lens, Piet N. L. [3 ]
Guibaud, Gilles [1 ]
机构：
[1] Univ Limoges, Groupement Rech Eau Sol Environm, EA 4330, F-87060 Limoges, France
[2] Univ Paris Est, Lab Geomat & Environm, EA 4508, F-77454 Marne La Vallee 2, France
[3] Wageningen Univ, Subdept Environm Technol, NL-6700 EV Wageningen, Netherlands
来源：
COLLOIDS AND SURFACES B-BIOINTERFACES | 2010年 / 80卷 / 02期
关键词：
Extracellular polymeric substances; Extraction method; Binding properties; pK(a); Pb; Cd; ACTIVATED-SLUDGE; TITRATION DATA; BIOSORPTION; CADMIUM; COMPLEXATION; ADSORPTION; SORPTION; LEAD; CD; CONSTANTS;
D O I：
10.1016/j.colsurfb.2010.05.043
中图分类号：
Q6 [生物物理学];
学科分类号：
071011 ;
摘要：
The effects of the extraction procedure of extracellular polymeric substances (EPS) on their proton/metal binding properties were studied. Nine extraction procedures (one control, four physical and four chemical procedures) were applied to four types of anaerobic granular sludges. The binding capacities between the EPS and lead or cadmium were investigated at pH 7 by a polarographic method. The composition of the EPS extracts varied according to the extraction technique and the origin of the sludge. This induced differences in the pK(a)s and the binding sites density of the EPS extracts. The carry-over of the extractant in the samples strongly affects the properties of the EPS from chemical extraction protocols. Lead and cadmium seem to be bound differently with the EPS, a higher binding capacity was observed for Pb2+ than for Cd2+. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：161 / 168
页数：8
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