Iron speciation in natural organic matter colloids

被引：62

作者：

Rose, J

Vilge, A

Olivie-Lauquet, G

Masion, A

Frechou, C

Bottero, JY

机构：

[1] Europole Mediterraneen Arbois, CEREGE, URA 132 CNRS, Lab Geosci Environm, F-13545 Aix En Provence 04, France

[2] Univ Paris 06, Lab Mineral Cristallochim, Paris 05, France

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1998年 / 136卷 / 1-2期

关键词：

D O I：

10.1016/S0927-7757(97)00150-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Natural colloids sampled in rivers in the Nsimi region (south Cameroon) were studied by extended X-ray absorption fine structure (EXAFS) spectroscopy and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) to determine the speciation of iron within these colloids. The analysis and modeling of the EXAFS spectra revealed that iron is poorly polymerized due to the complexation of Fe by the organic matter, since monodentate and bidentate complexes were detected. Py-GC-MS gave a closer insight into the chemical nature of the organic matter: the colloidal fraction, which corresponds to the EXAFS sample, consists mainly of carboxylic acids, thus explaining the high level of complexation of Fe. (C) 1998 Elsevier Science B.V.

引用

页码：11 / 19

页数：9

共 39 条

[1] STRUCTURE AND MECHANISMS OF FORMATION OF FEOOH(CL) POLYMERS [J].