A surface complexation model for sulfate and selenate on iron oxides consistent with spectroscopic and theoretical molecular evidence

Fukushi, Keisuke; Sverjensky, Dimitri A.

doi:10.1016/j.gca.2006.08.048

Cited by 108 publications

(131 citation statements)

References 63 publications

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“…It can be easily desorbed by a change in solution chemistry (for example pH, or ionic strength), and it exchanges readily with SO 4 . Ready desorption and exchange are among the reasons for the high solubility of Se(VI), which enhances its mobility (Fukushi and Sverjensky, 2007). In solutions of alkaline pH with high Eh values, Se(VI) is mobile and bioavailable to plants (Winkel and others, 2012).…”

Section: Mobility In Water and Soilsmentioning

confidence: 99%

Selenium

Stillings¹

2017

Professional Paper

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Division; available at http://periodic.lanl.gov/images/periodictable.pdf.Cover. Dendrites, consisting primarily of naumannite (silver selenide) and lesser amounts of electrum, sphalerite, chalcopyrite, tetrahedrite, and other silver minerals (dark gray to black areas), quartz (light gray areas), and quartz and a minor amount of illite (beige to white areas). Sample is from the Buckskin National Mine, Humboldt County, Nevada. Photograph by Peter Vikre, U.S. Geological Survey. For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov/.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Stillings, L.L., 2017, Selenium, chap. Q of Schulz, K.J., DeYoung, J.H., Jr., Seal, R.R., II, and Bradley, D.C., eds., Critical mineral resources of the United States-Economic and environmental geology and prospects for future supply: U.S. Geological Survey Professional Paper 1802, p. Q1-Q55, https://doi.org/10.3133/pp1802Q. ISSN 2330-7102 (online) iii Contents Abstract

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Section: Mobility In Water and Soilsmentioning

confidence: 99%

Selenium

Stillings¹

2017

Professional Paper

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“…The K int Cl value, which was not reported by Hayes et al [12] is in the range of 6.4-9.0 in the literatures [3,52,70,[72][73][74]; the intermediate value of 8.0 reported by Fukushi and Sverjensky [50] was adopted. The model parameters are summarized in Table 10.…”

Section: Sorption Behavior Of Se (Iv)mentioning

confidence: 99%

“…The surface site density (n s = 2.5 sites nm −2 ), surface acidity constants (logK [12]. c From Fukushi and Sverjensky [50]. d Determined by the least-squares fitting to the experimental data.…”

Section: Sorption Behavior Of Se (Iv)mentioning

confidence: 99%

“…Duc et al [6] assumed a bidentate complex (≡FeO) 2 SeO for the CCM calculation for the sorption of Se(IV) onto hematite. Fukushi and Sverjensky [50] demonstrated the applicability of an extended TLM, which took into account the effect the electrostatics of water dipole desorption had on the measurements reported for the sorption of Se(VI) onto goethite by Rietra et al [16,17] and Hayes et al [12]. The sorption behaviors of Se(VI) were explained by a mixture of outer-and inner-sphere surface complexes [≡FeOH 2 + − SeO 4 2− , (≡FeOH 2 + ) 2− SeO 4 2− , and ≡FeOSeO 3 − ].…”

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confidence: 99%

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Sorption behavior of hydroselenide (HSe⁻) onto iron-containing minerals

Iida

Yamaguchi

Tanaka

2013

Journal of Nuclear Science and Technology

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The sorption behavior of selenium onto iron-containing minerals such as goethite, ferrous oxide, magnetite, and biotite under reducing conditions were investigated by batch sorption experiments. Selenium was spiked as HSe − and Se 4 2− in the experimental solutions and reducing conditions were maintained throughout the sorption periods. The sorption behaviors of HSe − were analyzed by the triple-layer surface complexation model with the Visual Minteq computer program. The sorption data and the model calculations suggested that the dominant sorption mechanisms of HSe − were inner-sphere surface complexation for goethite and ferrous oxide but outer-sphere surface complexation for magnetite and biotite. The intrinsic equilibrium constant of the inner-sphere surface complexation reaction of HSe − with goethite, logK int HSe = 6.0, was determined by the fitting to the experimental results. The value of the equilibrium constant for outer-sphere complexation for magnetite and biotite was estimated to be around 12.

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“…The effect of sulphate ions on the iron oxide hydroxide (FeOOH) precipitation was less studied. Only few results were reported on the literature [13,14].…”

Section: Introductionmentioning

confidence: 99%

Effect of sulphate ions on iron precipitation from aqueous solutions

Korchef¹,

Amor

Galland

et al. 2008

Cryst. Res. Technol.

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In the present work, the effects of sulphate ions on the iron precipitation from aqueous solution were investigated. It was shown that sulphate ions delayed the iron precipitation when this ion was added in form of Na 2 SO 4 . This effect became less significant in presence of magnesium or calcium. The iron precipitates were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). In all experiments iron oxide hydroxide (FeOOH) precipitates were obtained. The sulphate ions were adsorbed on the surfaces of the iron precipitates. The effect of temperature on these precipitates was also studied. At 237°C, the iron oxide hydroxide precipitates obtained from NaCl solution was transformed in crystallized hematite, Fe 2 O 3 . At 793°C, the hematite was partially transformed into magnetite (Fe 3 O 4 ). In presence of sulphate ions, this transformation was not detected.

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A surface complexation model for sulfate and selenate on iron oxides consistent with spectroscopic and theoretical molecular evidence

Cited by 108 publications

References 63 publications

Selenium

Selenium

Sorption behavior of hydroselenide (HSe⁻) onto iron-containing minerals

Effect of sulphate ions on iron precipitation from aqueous solutions

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A surface complexation model for sulfate and selenate on iron oxides consistent with spectroscopic and theoretical molecular evidence

Cited by 108 publications

References 63 publications

Selenium

Selenium

Sorption behavior of hydroselenide (HSe−) onto iron-containing minerals

Effect of sulphate ions on iron precipitation from aqueous solutions

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Product

Resources

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Sorption behavior of hydroselenide (HSe⁻) onto iron-containing minerals