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Iron speciation in interaction with organic matter: Modelling and experimental approach |
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| Authors: | T Weber T Allard MF Benedetti |
| Institution: | aInstitut de Minéralogie et Physique des Milieux Condensés, Universités Paris 6 et 7, UMR 7590 and IPGP, 140 rue de Lourmel, 75015 Paris, France;bLaboratoire de Géochimie des Eaux, Université Paris 7, UMR CNRS 7047 and IPGP, Case postale 7052, 75251 Paris Cedex 05, France |
| Abstract: | The present study aims to model iron speciation when interacting with natural organic matter. Experimental data for iron speciation were achieved with insolubilized humic acid as an organic matter analogue for 1.8 × 10− 3 M and 1.8 × 10− 4 M iron concentrations and 2–5 pH range. Combining EPR spectroscopy and chemical analysis allowed us to fit NICA-Donnan model parameters for both organic complexation of iron and oxides precipitation. |
| Keywords: | Iron Organic matter Speciation Modelling EPR |
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