In situ characterization of (poly)molybdate and (poly)tungstate ions sorbed onto iron (hydr)oxides by ATR-FTIR spectroscopy

Davantès, A.; Lefèvre, Grégory

doi:10.1140/epjst/e2015-02514-8

Cited by 19 publications

(15 citation statements)

References 23 publications

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“…We perform thermodynamic modeling to predict relative proportions of (poly)vanadate species and, therefore, to carry out the interpretation of ATR–FTIR results. The analysis of molecular-level reactions between aqueous monomeric, oligomeric, and polymeric species and mineral surfaces by ATR–FTIR is a well-established technique. ,− Our results contribute new information on aqueous (poly)vanadate attenuation by Fe(III) (oxyhydr)oxides and improve the understanding of processes controlling V abundance and distribution in soils and sediments.…”

Section: Introductionmentioning

confidence: 79%

“…Nevertheless, these reactions likely impact V mobility in terrestrial waters characterized by elevated [V] T or low pH conditions. Previous studies have utilized in situ attenuated total reflectance–Fourier transform infrared (ATR–FTIR) spectroscopy to examine the adsorption of polynuclear Mo(VI), W(VI), and U(VI) onto Fe(III) (oxyhydr)oxides and layered-double hydroxides. − For example, attenuation of mono- and polynuclear Mo(VI) species by hematite occurred through monodentate, bidentate, and tridentate sorption complexes and additionally formed surface polymers by epitaxial growth on crystalline (0001) hematite surfaces . The formation of surface polymers on Fe(III) (oxyhydr)oxide surfaces can inhibit the adsorption of inorganic contaminants and, therefore, decrease the reactivity of these phases. − …”

Section: Introductionmentioning

confidence: 99%

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Adsorption of (Poly)vanadate onto Ferrihydrite and Hematite: An In Situ ATR–FTIR Study

Vessey

Schmidt

Abdolahnezhad

et al. 2020

ACS Earth Space Chem.

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Vanadium (V) geochemistry offers insight into Earth’s global biogeochemical cycles over geologic time. Additionally, increasing anthropogenic release of this redox-sensitive metal has led to elevated V concentrations in soils, sediments, and waters. Although Fe (oxyhydr)oxides are important sinks for aqueous V in soils and sediments, our understanding of adsorption mechanisms is currently limited to mononuclear species (i.e., H x VO4 (3–x)–). Here, we use in situ attenuated total reflectance–Fourier transform infrared spectroscopy to examine the sorption mechanisms for (poly)vanadate attenuation by ferrihydrite and hematite from pH 3 to 6. Adsorption isotherms illustrate the low affinity of polyvanadate species for ferrihydrite surfaces compared to that for hematite. Mononuclear V species (i.e., [H x VO4](3–x)– and VO2 +) were present at all experimental conditions. At low surface loadings and pH values of 5 and 6, H2VO4 – adsorption onto ferrihydrite and hematite surfaces results in the formation of inner-sphere complexes. At [V]T above 250 μM, adsorbed polynuclear V species in this study include H2V2O7 2– and V4O12 4–, whereas, HV10O28 6–, H3V10O28 5–, and NaHV10O28 4– are the predominant adsorbed species at pH values of 3 and 4 and elevated [V]T’s. Surface polymers were identified on hematite at all experimental pH values, whereas polymeric adsorption onto ferrihydrite was limited to pH values of 3 and 4. Results also suggest that hematite is a more suitable substrate for polymer complexation than ferrihydrite. Our results demonstrate the pH- and concentration-dependent removal of (poly)vanadate species by Fe(III) (oxyhydr)oxides, which has implications for understanding V mobility, behavior, and fate in the environment.

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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Adsorption of (Poly)vanadate onto Ferrihydrite and Hematite: An In Situ ATR–FTIR Study

Vessey

Schmidt

Abdolahnezhad

et al. 2020

ACS Earth Space Chem.

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“…XANES analyses suggest the presences of polymeric form molybdate (heptamolybdate). Spectroscopic studies have suggested that molybdate adsorbs to mineral surfaces not only as monomer, but also polymeric forms [49,50]. The heptamolybdate observed from EXAFS and XANES analyses might correspond to the polymeric adsorbed species.…”

Section: Chemical Speciation Of Mo In Sedimentsmentioning

confidence: 99%

Distribution and Chemical Speciation of Molybdenum in River and Pond Sediments Affected by Mining Activity in Erdenet City, Mongolia

et al. 2018

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Rivers and ponds near the Erdenet mine, one of the world's largest copper-molybdenum mines, exhibit high concentrations of molybdenum (Mo). This study evaluates the distribution and chemical speciation of Mo in surface sediments from ponds and rivers in Erdenet city to elucidate the mobility and solubility of Mo in the surface aquatic environments in the area. The waters and sediments were collected in two shallow ponds connected to the tailing pond and from three rivers flowing through Erdenet city. The distribution and chemical speciation of Mo in the sediments were examined using five-step sequential extraction and X-ray absorption fine structure (XAFS) analyses. The XAFS spectra of the sediments showed that large amounts of Mo in the sediments are molybdate or polymeric molybdate, weakly adsorbed onto ferrihydrite. Sequential extraction consistently showed a large amount of Mo distributed in the labile fractions. Results suggest that the surface sediments from ponds and rivers play a role as secondary contamination sources of Mo rather than as sinks of Mo in the area.

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“…Being anionic, dissolved tungsten species are electrostatically attracted to positively charged surfaces, which depending on the pH of the point of zero charge (pH pzc ) of the mineral, typically occurs at acidic pH Sposito, 1998). The complex aqueous speciation of tungsten makes thermodynamic modelling of tungsten adsorption difficult (Sen Tuna and Braida, 2014;Bostick et al, 2015;Davantès and Lefèvre, 2015;Cui and Johannesson, 2017;Hur and Reeder, 2018;Sallman et al, 2018), and most studies have addressed only the adsorption behaviour of the WO4 2anion (Vissenberg et al, 2000;Xu et al, 2006;Mohajerin et al, 2014a). conducted an adsorption experiment comparing the adsorption propensity of WO4 2-, MoO4 2-, and PO4 3on freshly precipitated ferrihydrite across the pH range of 3 to 10.…”

Section: Adsorption Of Tungstenmentioning

confidence: 99%

“…However, also found that the adsorption propensity of WO4 2and MoO4 2to δ-MnO2 is similar due to the formation of inner-sphere complexes of both species. Davantès and Lefèvre (2015) investigated the local structure of adsorbed tungsten and molybdenum to hematite (Fe2O3), goethite (FeOOH), akaganeite (β-FeOOH), and lepidocrocite (γ-FeOOH) with attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) spectroscopy and found that tungsten formed monodentate complexes in tetrahedral coordination on all of the Fe-oxyhydroxide minerals, but not hematite, which allowed the adsorption of polytungstate species in octahedral coordination. On the surface of boehmite (γ-AlOOH), tungsten was found to adsorb as polytungstate species even when tungsten was adsorbed at pH 8 where the WO4 2is the dominant species in solution .…”

Section: Adsorption Of Tungstenmentioning

confidence: 99%

Factors Controlling Tungsten Mobility in W-Cu Skarn Tailings at the Cantung Mine, Northwest Territories, Canada

Kazamel¹,

Jamieson²,

Leybourne³

et al. 2019

Geological Society of America Abstracts With Programs

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The first of many thank-you's goes to my supervisors, Heather Jamieson and Matt Leybourne, for their mentorship, guidance, and patience over the past few years. I am extremely privileged, honored, and proud to be part of the Jamieson Clan and the QFIR family, and couldn't have asked for a more wonderful group of people to develop my career as a geochemist with. The Winter Wonderlands, defense parties, and Grad Club beer discussions were some of the highlights of my time at Queen's. Heather, I fell in love with the north during our trip to Cantung, and our long, beautiful drives to and from the mine will be forever in my mind. Thank you so much for giving me this opportunity, and for the opportunities that have stemmed as a result from completing this thesis. Matt, your contributions to this thesis are innumerable. Having access to world class analytical facilities at QFIR, and same-day access to a worldclass geochemist for answers to my (often redundant) questions has been invaluable. Both of you held infinite patience during periods when I was low, and I honestly don't think my thesis would have been completed without your understanding. It has been a pleasure working with both of you. This thesis is dedicated to Kurt Kyser, who took me under his wing that one fateful summer in Kingston. After expressing my interest in geochemistry, Kurt offered me a summer student position at QFIR and exposed me to my first taste of analytical and field work, which lead to me completing an undergraduate thesis under his supervision. Kurt's enthusiasm for science, his lust for life, and his dedication to QFIR inspired me to pursue a career in geochemistry, and even more so to pursue a life of passion. I wish you could have reviewed this thesis, that we could've share the excitement of the results, or even just to have seen you shake your head and say, "nah". This thesis wouldn't be possible without Hendrik Falck, the Cantung connoisseur. Thank you for assisting with field work, and for sharing your big-brain knowledge of the Cantung deposit, of the history of the mine, and of the physiography of the Flat River valley. A brewpub visit in is order during my next visit to Yellowknife! A very special thank-you is in order for Dan Layton-Matthews, who first sparked v my interest in geochemistry via ternary diagrams in second year petrology, and another to Noel James for our discussions about big-picture global issues, science and creativity, and for just being a rad dude. Guy Narbonne, thank you for taking care of me when I got sick in Namibia, and for expressing not even the slightest discontent about missing part of the Etosha safari. Rob Harrap, I don't know how to express my thanks to you. We've had so many discussions throughout my undergraduate and master's degrees about anything and everything, but the ones where I came in distressed and left with some clarity are undoubtedly the most important.To all of the QFIR family, thank you for all of the analytical assistance, the laughs, and the wine over the years. April, your bubbli...

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In situ characterization of (poly)molybdate and (poly)tungstate ions sorbed onto iron (hydr)oxides by ATR-FTIR spectroscopy

Cited by 19 publications

References 23 publications

Adsorption of (Poly)vanadate onto Ferrihydrite and Hematite: An In Situ ATR–FTIR Study

Adsorption of (Poly)vanadate onto Ferrihydrite and Hematite: An In Situ ATR–FTIR Study

Distribution and Chemical Speciation of Molybdenum in River and Pond Sediments Affected by Mining Activity in Erdenet City, Mongolia

Factors Controlling Tungsten Mobility in W-Cu Skarn Tailings at the Cantung Mine, Northwest Territories, Canada

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