Iron speciation in natural organic matter colloids
作者： Jérôme Rose , Astride Vilge , Gwenaelle Olivie-Lauquet , Armand Masion , Carole Frechou
DOI: 10.1016/S0927-7757(97)00150-7
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摘要: Abstract Natural colloids sampled in rivers 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 speciation of iron within these colloids. The analysis modeling EXAFS spectra revealed that is poorly polymerized due complexation Fe organic matter, since monodentate bidentate complexes detected. Py-GC-MS gave a closer insight into chemical nature matter; colloidal fraction, which corresponds sample, consists mainly carboxylic acids, thus explaining high level Fe.
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