AsIII oxidation by Thiomonas arsenivorans in up-flow fixed-bed reactors coupled to As sequestration onto zero-valent iron-coated sand

Wan, Junfeng; Klein, J.; Simon, Stéphane; Joulian, Catherine; Dictor, Marie Christine; Deluchat, Véronique; Dagot, Christophe

doi:10.1016/j.watres.2010.08.044

Cited by 60 publications

(12 citation statements)

References 52 publications

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“…More recently, Wan and colleagues set up two reactors, one filled with sand and cells of T. arsenivorans, and the other with zero-valent iron (ZVI) [107]. The process was shown to be successful in terms of biological As(III) oxidation, and the chemical removal of arsenic was enhanced by ZVI, even though a decrease in adsorbing power was observed during the biological oxidation peak, probably due to biofilm formation on the ZVI surface and changes in the physicochemical conditions.…”

Section: Arsenic Removal From Waters: the Biological Stepmentioning

confidence: 99%

Microbial Transformations of Arsenic: Perspectives for Biological Removal of Arsenic from Water

et al. 2013

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Arsenic is present in many environments and is released by various natural processes and anthropogenic actions. Although arsenic is recognized to cause a wide range of adverse health effects in humans, diverse bacteria can metabolize it by detoxification and energy conservation reactions. This review highlights the current understanding of the ecology, biochemistry and genomics of these bacteria, and their potential application in the treatment of arsenic-polluted water.

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Section: Arsenic Removal From Waters: the Biological Stepmentioning

confidence: 99%

Microbial Transformations of Arsenic: Perspectives for Biological Removal of Arsenic from Water

et al. 2013

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“…Arsenic pollution is a great concern because of its toxicity and carcinogenicity with respect to human health (Ding, Fu, Cheng, Lu, & Bing, ). It is a common groundwater contaminant and mainly occurs in inorganic forms, such as arsenate (As(V)) and arsenite (As(III)) species (Wan et al., ). In water environments, As(III) is more toxic and mobile than As(V) is.…”

Section: Introductionmentioning

confidence: 99%

Arsenite removal from groundwater by iron–manganese oxides filter media: Behavior and mechanism

Cheng

Zhang

2019

Water Environment Research

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Arsenic, a common contaminant in groundwater environments, usually coexists with other contaminants, for example, ammonium, iron, and manganese. In our previous studies, an iron-manganese (Fe-Mn) oxides filter media was developed for catalytic oxidation removal of ammonium, iron, and manganese. In this study, batch oxidation/ adsorption kinetic experiments revealed that the filter media could easily oxidize arsenite (As(III)) to arsenate (As(V)). And the sorption kinetics was found to follow the pseudo-second-order kinetic model. X-ray powder diffraction (XRD) and Fourier transform infrared spectra (FTIR) along with X-ray photoelectron spectroscopy (XPS) were used to analyze the surface change in the Fe-Mn oxides. Based on sorption and spectroscopic measurements, the mechanism of As(III) removal by the Fe-Mn oxides filter media was found to be an oxidation coupled with sorption approach. As(III) in the aqueous solution was firstly oxidized to As(V) on the surfaces of the Fe-Mn oxides filter media. Then the converted As(V) was attracted to the Fe-Mn oxides filter media surfaces and bounded with the active sites (−OH groups), through weak intermolecular H-bondings. Our results indicated that the novel Fe-Mn oxides filter media could be applied for the simultaneous removal of ammonium, iron, manganese, and As(III) in drinking water treatment and environmental remediation. • Practitioner points• A novel iron-manganese oxides filter for efficient As(III) removal was established. • The exhausted filter media could be easily regenerated by NaHCO 3 solution.• Mn(III) related to surface lattice oxygen species was responsible for As(III) oxidation. • The oxidation and adsorption processes were involved in As(III) removal. • The filter media could be successfully applied to simultaneous removal of ammonium, manganese, iron, and arsenic.

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“…[4] In lab-scale experiment, ZVI coated-sand filled in fixed-bed reactor was proved to be an attractive process for As removal. [5] If the exact mechanisms of As removal by ZVI are still not clear, many studies showed that As removal is mainly due to adsorption and co-precipitation with ZVI and its oxidation products. [4,6,7] Thus, the capacity of As removal by ZVI may be closely related with the oxidation of ZVI.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of As^III, As^Vand dimethylarsinic acid onto synthesized lepidocrocite

Wan

Simon

Deluchat

et al. 2013

Journal of Environmental Science and Health, Part A

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The trapping of arsenic by zero valent iron is strongly dependant on iron by-products. Among these, lepidocrite has been scarcely studied. In this work, we studied the adsorption of two inorganic (As(III), As(V)) and one organic (dimethylarsinic acid, DMA) arsenic species onto lepidocrocite. pH influence was considered in the range 5 to 9, which corresponds to natural water pH. Langmuir model was used to simulate As adsorption isotherms. Our results showed that lepidocrocite offers high adsorption capacities: up to 0,25, 0,41 and 1 mol for As(V), DMA and As(III) could be respectively trapped per kilogram of zero-valent iron. pH influence varied from one arsenic species to another: increasing pH improve As(III) and DMA sorption whereas it has a very low effect on As(V) sorption.

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AsIII oxidation by Thiomonas arsenivorans in up-flow fixed-bed reactors coupled to As sequestration onto zero-valent iron-coated sand

Cited by 60 publications

References 52 publications

Microbial Transformations of Arsenic: Perspectives for Biological Removal of Arsenic from Water

Microbial Transformations of Arsenic: Perspectives for Biological Removal of Arsenic from Water

Arsenite removal from groundwater by iron–manganese oxides filter media: Behavior and mechanism

Adsorption of As^III, As^Vand dimethylarsinic acid onto synthesized lepidocrocite

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AsIII oxidation by Thiomonas arsenivorans in up-flow fixed-bed reactors coupled to As sequestration onto zero-valent iron-coated sand

Cited by 60 publications

References 52 publications

Microbial Transformations of Arsenic: Perspectives for Biological Removal of Arsenic from Water

Microbial Transformations of Arsenic: Perspectives for Biological Removal of Arsenic from Water

Arsenite removal from groundwater by iron–manganese oxides filter media: Behavior and mechanism

Adsorption of AsIII, AsVand dimethylarsinic acid onto synthesized lepidocrocite

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Adsorption of As^III, As^Vand dimethylarsinic acid onto synthesized lepidocrocite