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Maya Ikogou

Maya Ikogou
Sorbonne Université | UPMC · Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC) - UMR 7590

About

8
Publications
1,104
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245
Citations
Citations since 2017
4 Research Items
241 Citations
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20172018201920202021202220230204060
20172018201920202021202220230204060

Publications

Publications (8)
Article
Contaminated systems in which uranium (U) concentrations slightly exceed the geochemical background are of particular interest to identify natural processes governing U trapping and accumulation in Earth’s surface environments. For this purpose, we examined the role of early diagenesis on the evolution of U speciation and mobility in sediments from...
Article
Full-text available
Chemical and isotopic compositions of pyrites are used as biogeochemical tracers in Archean to modern sediments. Moreover, pyrite formation from monosulphide precursors has been proposed to be involved in prebiotic chemistry. However, the factors controlling pyrite formation and distribution in the sedimentary record are incompletely understood. He...
Article
In euxinic sediments, the reaction between iron and sulfides results in the formation of Fe(II)-sulfides, which are known to play a key role in trace metal sequestration. The present study investigates the sequestration of nickel during Fe(II)-sulfide formation mediated by the (thio)sulfate-reducing bacterium Desulfovibrio capillatus in the presenc...
Chapter
Fe-bearing minerals are widespread in earth surface environments, including soils, sediments and aquifers. Owing to their large specific area, these minerals can efficiently scavenge inorganic pollutants such as arsenic, nickel, etc. Metabolic activities of native microorganisms are capable of weathering either directly by enzymatic reduction, or i...
Article
Pyrite is an ubiquitous mineral in reducing environments, and is well-known to incorporate trace elements such as Co, Ni, Se, Au and commonly arsenic. Indeed, As-bearing pyrite is observed in a wide variety of sedimentary environments, making it a major sink for this toxic metalloid. Based on the observation of natural hydrothermal pyrites, As-I is...
Article
Acid mine drainages (AMD) are major sources of pollution to the environment. Passive bio-remediation technologies involving sulfate-reducing bacteria (SRB) are promising for treating arsenic contaminated waters. However, mechanisms of biogenic As-sulfide formation need to be better understood to decontaminate AMDs in acidic conditions. Here, we sho...
Article
Previous genetic studies showing evidence of past demographic changes in African drosophilids suggested that these populations had strongly responded to Quaternary climate changes. We surveyed nine species of Zaprionus, a drosophilid genus mostly present in Africa, in forests located between southern Senegal and Gabon. The mitochondrial COI gene sh...

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