| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Abdelmoula, Mustapha
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2019Starch functionalized magnetite nanoparticles: New insight into the structural and magnetic propertiescitations
- 2019Starch functionalized magnetite nanoparticles: New insight into the structural and magnetic propertiescitations
- 2019Structure of single sheet iron oxides produced from surfactant interlayered green rustscitations
- 2018Abiotically or microbially mediated transformations of magnetite by sulphide species: The unforeseen role of nitrate-reducing bacteriacitations
- 2017Shale Of The Ivory Coast As A Filtration Material For Phosphate Removal From Waste Water
- 2017Biogenic Mineral Precipitation during Antimony bearing Ferrihydrite bioreduction
- 2012Application of magnetite catalyzed chemical oxidation (Fenton-like and persulfate) for the remediation of oil hydrocarbon contaminationcitations
- 2010In situ oxidation of green rusts by deprotonation; wet corrosion and passivation of weathering steelscitations
- 2009Arsenite sequestration at the surface of nano-Fe(OH)2, ferrous-carbonate hydroxide, and green-rust after bioreduction of arsenic-sorbed lepidocrocite by Shewanella putrefacienscitations
- 2009Arsenite sequestration at the surface of nano-Fe(OH)2, ferrous-carbonate hydroxide, and green-rust after bioreduction of arsenic-sorbed lepidocrocite by Shewanella putrefacienscitations
- 2008Aluminium substitution in iron(II–III)-layered double hydroxides: Formation and cationic ordercitations
- 2008Comparative studies of ferric green rust and ferrihydrite coated sand: Role of synthesis routescitations
Places of action
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document
Biogenic Mineral Precipitation during Antimony bearing Ferrihydrite bioreduction
Abstract
Fe(III) oxide such as ferrihydrite are ubiquitous in sediments and soils and due to their large surface area and reactive surface properties, they can be important sorbents of metal and metalloid such as antimony (Sb). Sorption and co-precipitation are considered to be the predominant processes by which most of the metals are scavenged by iron oxides, although co-precipitation appears to be more efficient for the removal of metals from solution. However, co-precipitated metals can be released to the surrounding environment as a direct or indirect consequence of dissimilatory iron reduction (DIR), which is a microbial reduction process of geochemical importance in natural systems. Even if DIR is often implicated in the remobilization of metals, the subsequent bio-mineralization processes can lead to their sequestration into secondary mineral products. Therefore, the aim of our study was to investigate Sb behavior during DIR. Sb-bearing ferrihydrites, with variable Sb/(Fe+Sb) molar ratios, were synthezised by coprecipitation and incubated with an iron reducing bacteria, Shewanella oneidensis MR1. Chemical analysis were undertaken to monitor the rate and the extent of the bioreduction and the mobilisation of Sb. Mössbauer analysis were carried out to characterize the bulk cation properties of the biogenic minerals at different temperatures. The spectra were fitted to obtain degrees of oxidation of iron and therefore it's mineralogical signature. Measurements of the magnetization with respect to applied magnetic field were also carried out at room and low temperature and coercivity, saturation magnetization and remanence data obtained from hysteresis loops. The results revealed that the presence of Sb impacted the extent of reduction but no significant difference was measured in the rate of Fe(III) reduction. Although, the precipitaion of biogenic magnetite was evidenced independently of the intial Sb/(Fe+Sb) molar ratios, the biogenic magnetites displayed variable structural and magnetic properties implying an incorporation of Sb in their crystallographic structure.