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

Ona-Nguéma, Georges; Morin, Guillaume; Wang, Yuheng; Menguy, Nicolas; Juillot, Farid; Olivi, Luca; Aquilanti, Giuliana; Abdelmoula, Mustapha; Ruby, Christian; Bargar, John R.; Guyot, F.; Calas, Georges; Brown, Gordon E.

doi:10.1016/j.gca.2008.12.005

Cited by 88 publications

(109 citation statements)

References 89 publications

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“…The co-precipitation of As(III) with dissolved ferrous iron [Fe(II)] has been considered an effective mechanism to immobilize As(III) from the liquid phase (Roberts et al 2004;Ona-Nguema et al 2009). Alternatively, dissolved Fe(II) may be oxidized during aeration and form poorly crystalline iron (hydr)oxides, which are known as superior As(III) adsorbents at neutral pH (Hering et al 1997;Dixit and Hering 2003).…”

Section: Liquid Phase Analysismentioning

confidence: 99%

Effect of soil microorganisms on arsenite oxidation in paddy soils under oxic conditions

Dong

Yamaguchi

Makino

et al. 2014

Soil Science and Plant Nutrition

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The contribution of abiotic and biotic processes to the oxidation of arsenite [As(III)] when anaerobic paddy soils were shifted to oxic conditions was investigated. Soil slurries were first incubated under reducing conditions to allow indigenous arsenic (As) to be dissolved into the liquid phase as As(III), and were then switched to oxic incubation conditions with shaking. One day after switching to oxic incubation, As(III) almost disappeared from the liquid phase without any increase of arsenate [As(V)], suggesting that dissolved As(III) was coprecipitated or adsorbed on the soil solid phase. X-ray adsorption near-edge structure (XANES) analysis revealed that the predominant species of As in the solid phase before the oxic incubation was As(III), ranging from 74 to 85% of total As. After 1 d of the oxic incubation, the proportion of As(III) decreased to 46-47%. This oxidation step was an abiotic process and 28-38% of As(III) was oxidized per day on average. However, the abiotic oxidation ceased within 24 h probably due to passivation of reactive sites on the mineral surface. Afterward, a second slow oxidation step (2.5-2.8% per day on average) became predominant. Interestingly, this step was microbiologically mediated, since it did not occur in sterilized soil slurries. Determination of putative arsenite oxidase gene (aioA) sequences suggested that arsenite-oxidizing bacteria are actually present in our soil slurries. Our results suggest that microbial As(III) oxidation accounts for more than 30% of total As(III) oxidation, and thus it is an important process especially after abiotic oxidation ceases.

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Section: Liquid Phase Analysismentioning

confidence: 99%

Effect of soil microorganisms on arsenite oxidation in paddy soils under oxic conditions

Dong

Yamaguchi

Makino

et al. 2014

Soil Science and Plant Nutrition

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“…Under oxic conditions, crystallized or amorphous Fe(III) mineral phases are able to incorporate or scavenge toxic trace elements such as As, Cr, Cd or Pb (Bousserrhine et al, 1999;Morin et al, 1999Morin et al, , 2002Brown and Sturchio, 2002;Bonneville et al, 2004;Morin and Calas, 2006). Secondary Fe(II)-Fe(III)-containing minerals, such as green rusts and magnetite (Lovley et al, 1987;Ona-Nguema et al, 2002, 2004Zachara et al, 2002;Glasauer et al, Chemical Geology 406 (2015) [34][35][36][37][38][39][40][41][42][43][44] 2003; Zegeye et al, 2005), have been shown to scavenge trace elements (e.g., Cooper et al, 2000;Coker et al, 2006;Root et al, 2007;Wang et al, 2008;Ona-Nguema et al, 2009). Among the trace metals, arsenic (As) is strongly adsorbed onto Fe-oxides (Manning et al, 1998;Raven et al, 1998;Dixit and Hering, 2003), which are probably the largest carriers of As in aquifers and soils (Morin et al, 2002;Cancès et al, 2005Cancès et al, , 2008; Morin and Calas, 2006).…”

Section: Introductionmentioning

confidence: 99%

Bacteria-mediated reduction of As(V)-doped lepidocrocite in a flooded soil sample

et al. 2015

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International audienceUnderstanding the processes involved in the control of arsenic (As) dynamics within soils has become a challenging issue for soil and water quality preservation. Interactions between mineralogical phases, organic ligands and bacterial communities - closely linked to the chemical conditions of the medium - were thus investigated through a geochemical and microbiological experimental study involving the reduction of As(V)-doped lepidocrocite within the soil. Reducing conditions were established as soon as the experiment started, followed by a release of dissolved organic carbon corresponding to a release of acetate. Scanning Electron Microscopy observations pointed out a large bacterial colonization occurring on the lepidocrocite leading to a 3-dimensionally shaped biodissolution of lepidocrocite. The taxonomic diversity evolved throughout the experiment, and thus it demonstrated the evolution of the metabolic activities of the bacteria. At the beginning, lepidocrocite was mainly colonized by bacteria belonging to the Geobacter genus (Deltaproteobacteria) (26%) and Bacillus and Oxalophagus fermentative related genera (Firmicutes) (72%). After two weeks, Geobacter spp. and Firmicutes represented 54% and 30% of the bacterial community, respectively. Although still dominated by Geobacter spp. (34%) at the end of the experiment, the bacterial diversity had increased. After 3 and 8 weeks of incubation, the presence of the arsB and ACR3(1) genes, encoding transporters involved in As detoxification processes, indicated that this community harbored As-resistant or As-transforming genera able to contribute to the transformation of As(V) into As(III)

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“…To handle this complexity, we and others have employed a reductionist approach in which experimental and theoretical studies of interfacial processes are carried out in simplified model systems, where variables can be carefully controlled (e.g ., Waychunas et al, 1993;Scheidegger et al ., 1997;Towle et al ., 1997;Thompson et al, 1999;Sherman and Randall, 2003) . This is followed by studies of increasingly complex model systems, using both UHV and in situ methods, ultimately approaching the complexity of natural systems (e.g., Templeton et al, 2001;Fandeur et al ., 2009;Ona-Nguema et al, 2009;Ha et al ., 2009Ha et al ., , 2010Lee et al, 2010;Wang et al ., submitted-a) . In order to assure that the model systems chosen for study are relevant to the naturally occurring phenomena we wish to understand, parallel field studies of real environmental samples (e.g ., soils polluted with arsenic or lead) are also essential (e.g., Foster et al, 1998;Morin et al, 1999;Cancès et al ., 2005) .…”

Section: The Nature Of Solid-water Interfacesmentioning

confidence: 99%

Mineral-Aqueous Solution Interfaces and Their Impact on the Environment

Brown¹,

Calas²

2012

GeochemPersp

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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

Cited by 88 publications

References 89 publications

Effect of soil microorganisms on arsenite oxidation in paddy soils under oxic conditions

Effect of soil microorganisms on arsenite oxidation in paddy soils under oxic conditions

Bacteria-mediated reduction of As(V)-doped lepidocrocite in a flooded soil sample

Mineral-Aqueous Solution Interfaces and Their Impact on the Environment

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