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Georges Ona-Nguema
Georges Ona-Nguema
Sorbonne Université - Faculté des Sciences et Ingénierie - Campus Pierre & Marie Curie
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EXAFS analysis of arsenite adsorption onto two-line ferrihydrite, hematite, goethite, and lepidocrocite
G Ona-Nguema, G Morin, F Juillot, G Calas, GE Brown
Environmental science & technology 39 (23), 9147-9155, 2005
4262005
Iron (II, III) hydroxycarbonate green rust formation and stabilization from lepidocrocite bioreduction
G Ona-Nguema, M Abdelmoula, F Jorand, O Benali, A Géhin, JC Block, ...
Environmental Science & Technology 36 (1), 16-20, 2002
2322002
Green Rust Formation during Fe(II) Oxidation by the Nitrate-Reducing Acidovorax sp. Strain BoFeN1
C Pantke, M Obst, K Benzerara, G Morin, G Ona-Nguema, U Dippon, ...
Environmental science & technology 46 (3), 1439-1446, 2012
2062012
XANES Evidence for Rapid Arsenic(III) Oxidation at Magnetite and Ferrihydrite Surfaces by Dissolved O2 via Fe2+-Mediated Reactions
G Ona-Nguema, G Morin, Y Wang, AL Foster, F Juillot, G Calas, ...
Environmental science & technology 44 (14), 5416-5422, 2010
1952010
Significance, mechanisms and environmental implications of microbial biomineralization
K Benzerara, J Miot, G Morin, G Ona-Nguema, F Skouri-Panet, C Ferard
Comptes Rendus Geoscience 343 (2), 160-167, 2011
1912011
Significance, mechanisms and environmental implications of microbial bio-mineralization; Importance, mecanismes et implications environnementales de la biomineralisation par …
K Benzerara, J Miot, G Morin, G Ona-Nguema, F Skouri-Panet, C Ferard
Comptes Rendus-Academie des Sciences. Geoscience, 2011
191*2011
Arsenite sorption at the magnetite–water interface during aqueous precipitation of magnetite: EXAFS evidence for a new arsenite surface complex
Y Wang, G Morin, G Ona-Nguema, N Menguy, F Juillot, E Aubry, F Guyot, ...
Geochimica et Cosmochimica Acta 72 (11), 2573-2586, 2008
1272008
Extended X-ray absorption fine structure analysis of arsenite and arsenate adsorption on maghemite
G Morin, G Ona-Nguema, Y Wang, N Menguy, F Juillot, O Proux, F Guyot, ...
Environmental science & technology 42 (7), 2361-2366, 2008
1272008
Distinctive arsenic (V) trapping modes by magnetite nanoparticles induced by different sorption processes
Y Wang, G Morin, G Ona-Nguema, F Juillot, G Calas, GE Brown Jr
Environmental science & technology 45 (17), 7258-7266, 2011
1242011
Arsenite sequestration at the surface of nano-Fe (OH) 2, ferrous-carbonate hydroxide, and green-rust after bioreduction of arsenic-sorbed lepidocrocite by Shewanella putrefaciens
G Ona-Nguema, G Morin, Y Wang, N Menguy, F Juillot, L Olivi, G Aquilanti, ...
Geochimica et Cosmochimica Acta 73 (5), 1359-1381, 2009
1192009
Ni speciation in a New Caledonian lateritic regolith: a quantitative X-ray absorption spectroscopy investigation
G Dublet, F Juillot, G Morin, E Fritsch, D Fandeur, G Ona-Nguema, ...
Geochimica et Cosmochimica Acta 95, 119-133, 2012
1112012
Molecular-level modes of As binding to Fe(III) (oxyhydr)oxides precipitated by the anaerobic nitrate-reducing Fe(II)-oxidizing Acidovorax sp. strain BoFeN1
C Hohmann, G Morin, G Ona-Nguema, JM Guigner, GE Brown, A Kappler
Geochimica et Cosmochimica Acta 75 (17), 4699-4712, 2011
1112011
Fougerite and FeII–III hydroxycarbonate green rust; ordering, deprotonation and/or cation substitution; structure of hydrotalcite-like compounds and mythic ferrosic …
JMR Génin, R Aïssa, A Géhin, M Abdelmoula, O Benali, V Ernstsen, ...
Solid State Sciences 7 (5), 545-572, 2005
1112005
Evidence for different surface speciation of arsenite and arsenate on green rust: an EXAFS and XANES study
Y Wang, G Morin, G Ona-Nguema, F Juillot, F Guyot, G Calas, ...
Environmental science & technology 44 (1), 109-115, 2009
1042009
Structure and reactivity of As (III)-and As (V)-rich schwertmannites and amorphous ferric arsenate sulfate from the Carnoulès acid mine drainage, France: Comparison with biotic …
F Maillot, G Morin, F Juillot, O Bruneel, C Casiot, G Ona-Nguema, Y Wang, ...
Geochimica et Cosmochimica Acta 104, 310-329, 2013
1032013
EXAFS analysis of iron cycling in mangrove sediments downstream a lateritized ultramafic watershed (Vavouto Bay, New Caledonia)
V Noel, C Marchand, F Juillot, G Ona-Nguema, E Viollier, G Marakovic, ...
Geochimica et Cosmochimica Acta 136, 211-228, 2014
952014
EXAFS and HRTEM evidence for As (III)-containing surface precipitates on nanocrystalline magnetite: implications for As sequestration
G Morin, Y Wang, G Ona-Nguema, F Juillot, G Calas, N Menguy, E Aubry, ...
Langmuir 25 (16), 9119-9128, 2009
912009
Oxidation modes and thermodynamics of FeII–III oxyhydroxycarbonate green rust: Dissolution–precipitation versus in situ deprotonation
C Ruby, M Abdelmoula, S Naille, A Renard, V Khare, G Ona-Nguema, ...
Geochimica et Cosmochimica Acta 74 (3), 953-966, 2010
892010
Arsenate and arsenite adsorption onto Al-containing ferrihydrites. Implications for arsenic immobilization after neutralization of acid mine drainage
A Adra, G Morin, G Ona-Nguema, J Brest
Applied Geochemistry 64, 2-9, 2016
852016
Arsenic scavenging by aluminum-substituted ferrihydrites in a circumneutral pH river impacted by acid mine drainage.
A Adra, G Morin, G Ona-Nguema, N Menguy, F Maillot, C Casiot, ...
Environmental science & technology 47 (22), 12784-12792, 2013
852013
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