EXAFS and XANES studies of retention of copper and lead by a lignocellulosic biomaterial

被引：47

作者：

Dupont, L ^{[1
]}

Guillon, E ^{[1
]}

Bouanda, J ^{[1
]}

Dumonceau, J ^{[1
]}

Aplincourt, M ^{[1
]}

机构：

[1] Univ Reims, GRECI, F-51687 Reims 2, France

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2002年 / 36卷 / 23期

关键词：

D O I：

10.1021/es025764o

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Lignocellulosic substrate (LS), which is a low cost biomaterial, has a strong complexing ability and can be used in the treatment of wastewaters as biosorbent to remove heavy metals. The speciation of copper and lead to this biomaterial has been studied by X-ray absorption spectroscopy. The copper(II) has a 6-coordinate structure with four oxygen atoms in the equatorial plane at 1.95 Angstrom and two in axial position at 2.35 Angstrom. In the case of lead a particularly low coordination number of about 3 has been obtained. The combination of extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) suggested that Cu and Pb are bound to the surface of LS through carboxylic moieties.

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页码：5062 / 5066

页数：5

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