Arsenate uptake and arsenite simultaneous sorption and oxidation by Fe–Mn binary oxides: Influence of Mn/Fe ratio, pH, Ca2+, and humic acid

Zhang, Gaosheng; Liu, Huijuan; Qu, Jiuhui; Jefferson, William A.

doi:10.1016/j.jcis.2011.09.058

Cited by 117 publications

(39 citation statements)

References 38 publications

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“…The fast precipitation of released Fe(III) speciation might occur (Eqs. (18)- (20)) and led to the improvement of As(III) removal at low pH conditions, which could account for the difference in the removal of As(III) by FBBS below pH 6.0 from that by amorphous Fe oxide [40]. The concentrations of released Fe were reduced to as low as 0.18 mg/L with pH increased to 7.…”

Section: Effects Of Solution Ph On As(iii) Adsorptionmentioning

confidence: 92%

Removal of arsenic(III) from aqueous solution using a low-cost by-product in Fe-removal plants—Fe-based backwashing sludge

Liu

et al. 2013

Chemical Engineering Journal

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Section: Effects Of Solution Ph On As(iii) Adsorptionmentioning

confidence: 92%

Removal of arsenic(III) from aqueous solution using a low-cost by-product in Fe-removal plants—Fe-based backwashing sludge

Liu

et al. 2013

Chemical Engineering Journal

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“…2d). The PZC of pure ferrihydrite is about pH 7.4 (Zhang et al, 2012) and that of CuO is pH 9.4 (Yoon et al, 1979). Obviously, the incorporation of CuO with iron oxide makes the composite a higher PZC than that of pure ferrihydrite.…”

Section: Characterization Of 1:2 Feecu Binary Oxidementioning

confidence: 97%

“…For arsenite, the uncharged H 3 AsO 3 dominates at pH lower than 9.0 under reducing conditions (Yan et al, 2000;Smedley and Kinniburgh, 2002). Various treatment techniques such as coagulation/precipitation (Scott et al, 1995), ion-exchange (Kartinen and Martin, 1995), sorption (Jang et al, 2006;Zhang et al, 2007a) and membrane processes (Kartinen and Martin, 1995;Waypa et al, 1997) have been developed and employed for arsenic removal. Due to its simplicity, high efficiency and cost-effectiveness, sorption processes are regarded as the most promising methods and largely used for arsenic removal from water and wastewater (Jang et al, 2006;.Sharma and Sohn, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…For instances, Zhang et al (2005) developed an FeeCe bimetal oxide sorbent, which has a much higher As(V) adsorption capacity than the individual Ce and Fe oxide. Zhang et al (2007a) prepared an FeeMn binary oxide sorbent, exhibiting a greater enhancement in both As(V) and As(III) removal. Gupta and Ghosh (2009) reported the synthesis and use of an FeeTi binary mixed oxide for arsenic sorption.…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured iron(III)-copper(II) binary oxide: A novel adsorbent for enhanced arsenic removal from aqueous solutions

et al. 2013

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Arsenate Arsenite Regeneration a b s t r a c tTo obtain a highly efficient and low-cost adsorbent for arsenic removal from water, a novel nanostructured FeeCu binary oxide was synthesized via a facile co-precipitation method.Various techniques including BET surface area measurement, powder XRD, SEM, and XPS were used to characterize the synthetic FeeCu binary oxide. It showed that the oxide was poorly crystalline, 2-line ferrihydrite-like and was aggregated with many nanosized particles. Laboratory experiments were performed to investigate adsorption kinetics, adsorption isotherms, pH adsorption edge and regeneration of spent adsorbent. The results indicated that the FeeCu binary oxide with a Cu: Fe molar ratio of 1:2 had excellent performance in removing both As(V) and As(III) from water, and the maximal adsorption capacities for As(V) and As(III) were 82.7 and 122.3 mg/g at pH 7.0, respectively. The values are favorable, compared to those reported in the literature using other adsorbents. The coexisting sulfate and carbonate had no significant effect on arsenic removal. However, the presence of phosphate obviously inhibited the arsenic removal, especially at high concentrations. Moreover, the FeeCu binary oxide could be readily regenerated using NaOH solution and be repeatedly used. The FeeCu binary oxide could be a promising adsorbent for both As(V) and As(III) removal because of its excellent performance, facile and low-cost synthesis process, and easy regeneration. ª 2013 Elsevier Ltd. All rights reserved. IntroductionArsenic, a ubiquitous element found in the environment, is well-known and extensively concerned with high toxicity and carcinogenicity. It is introduced into the water and groundwater through a combination of natural processes such as weathering reactions, dissolution of minerals and biological activity as well as through anthropogenic activities such as mining, agriculture and manufacturing (Cullen and Reimer, 1989;Smedley and Kinniburgh, 2002 Available online at www.sciencedirect.com journal homepage: www.elsevier.com/locate /wa tres w a t e r r e s e a r c h 4 7 ( 2 0 1 3 ) 4 0 2 2 e4 0 3 1 0043-1354/$ e see front matter ª

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“…At lower pHs, it is thought that surface hydroxyl sites undergo increased protonation to form OH2 + and stronger As sorption results from the increased number of these positively charged sites which are inherently more attractive to the negatively charged arsenate ions (H2AsO4 -and HAsO4 2-) in solution [39].…”

Section: Batch Sorptionmentioning

confidence: 99%

In situ arsenic oxidation and sorption by a Fe-Mn binary oxide waste in soil

McCann

Peacock

Hudson‐Edwards

et al. 2018

Journal of Hazardous Materials

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In situ arsenic oxidation and sorption by a Fe-Mn binary oxide waste in soil., Journal of Hazardous Materialshttp://dx.doi.org/10. 1016/j.jhazmat.2017.08.066 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Graphical abstractHighlights  A Fe-Mn binary oxide waste is used to remediate As contaminated soils. As(III) and As(V) adsorption capacities of 70 mg g 1 and 32 mg g 1 were determined. The bioaccessibility of total As was significantly reduced by 7.80 %  Arsenic in the contaminated soil effectively binds to the exogenous binary oxide. As(V) was sorbed by mononuclear bidentate corner-sharing with Fe. AbstractThe ability of a Fe-Mn binary oxide waste to adsorb arsenic (As) in a historically contaminated soil was investigated. Initial laboratory sorption experiments indicated that arsenite [As(III)] was oxidized to arsenate [As(V)] by the Mn oxide component, with concurrent As(V) sorption to the Fe oxide. The binary oxide waste had As(III) and As(V) adsorption capacities of 70 mg g 1 and 32 mg g 1 respectively. X-ray Absorption Near-Edge Structure and Extended X-ray Absorption Fine Structure at the As K-edge confirmed that all binary oxide waste surface complexes were As(V) sorbed by 3 mononuclear bidentate corner-sharing, with 2 Fe at ~ 3.27 Ǻ The ability of the waste to perform this coupled oxidation-sorption reaction in real soils was investigated with a 10% by weight addition of the waste to an industrially As contaminated soil. Electron probe microanalysis showed As accumulation onto the Fe oxide component of the binary oxide waste, which had no As innately. The bioaccessibility of As was also significantly reduced by 7.80 % (p < 0.01) with binary oxide waste addition. The results indicate that Fe-Mn binary oxide wastes could provide a potential in situ remediation strategy for As and Pb immobilization in contaminated soils.

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Arsenate uptake and arsenite simultaneous sorption and oxidation by Fe–Mn binary oxides: Influence of Mn/Fe ratio, pH, Ca2+, and humic acid

Cited by 117 publications

References 38 publications

Removal of arsenic(III) from aqueous solution using a low-cost by-product in Fe-removal plants—Fe-based backwashing sludge

Removal of arsenic(III) from aqueous solution using a low-cost by-product in Fe-removal plants—Fe-based backwashing sludge

Nanostructured iron(III)-copper(II) binary oxide: A novel adsorbent for enhanced arsenic removal from aqueous solutions

In situ arsenic oxidation and sorption by a Fe-Mn binary oxide waste in soil

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