Tracing source and evolution of suspended particles in the Rio Negro Basin (Brazil) using chemical species of iron | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Tracing source and evolution of suspended particles in the Rio Negro Basin (Brazil) using chemical species of iron

Type de publication:

Journal Article

Source:

Chemical Geology, Volume 280, Ticket 1-2, p.79-88 (2011)

ISBN:

0009-2541

URL:

http://www.sciencedirect.com/science/article/pii/S0009254110003803

Mots-clés:

UMR 7154 ; Minéralogie ; Géochimie des eaux ; Iron; Colloids; Organic matter; Amazon Basin; EPR; Podzol

Résumé:

<p>Suspended solids found in porewaters obtained in waterlogged soil sequences that included representative laterite-podzol transitions, associated brooks and major rivers of the Rio Negro watershed (Brazil) were studied using electron paramagnetic resonance (EPR) and Fourier-transform infrared spectroscopies. The main goal was to ascertain sources and track the evolution of suspended matter using a ubiquitous chemical species, FeIII complexed to organic matter (FeOM). Three size fractions were separated by tangential-flow (ultra)filtration: particulate (&gt;0.2 mu m), dense (P) and light (Ps), and colloidal (5 kD</p>

Notes:

Allard, T. Weber, T. Bellot, C. Damblans, C. Bardy, M. Bueno, G. Nascimento, N. R. Fritsch, E. Benedetti, M. F.