Adsorption of antimony onto iron oxyhydroxides: Adsorption behavior and surface structure

Guo, Xuejun; Wu, Zhongke; He, Mengchang; Meng, Xiaoguang; Jin, Xin; Qiu, Nan; Zhang, Jing

doi:10.1016/j.jhazmat.2014.05.025

Cited by 321 publications

(166 citation statements)

References 37 publications

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“…The effect of pH on Sb(III) adsorption however was much weaker, showing a constant adsorbed fraction ~95% over the whole of the pH range investigated here, from 3 to 12. This is in good agreement with earlier studies [19,22]. The difference in adsorption efficiency of Sb(III) and Sb(V) ions may mainly be due to differences in the electrostatic interactions between the sorbent surface and Sb oxyanions present in the solutions.…”

Section: Sb(iii) and Sb(v) Adsorption In The Absence Of Silicasupporting

confidence: 93%

“…An inner-sphere formation for bidentate mononuclear edge-sharing between Sb(III) and HFO was reported by using EXAFS [22]. However, further spectroscopic evidence is necessary to understand the adsorption mechanism of Sb(III) and Sb(V) on the mineral surface in more detail.…”

Section: Sb(iii) and Sb(v) Adsorption In The Absence Of Silicamentioning

confidence: 99%

“…At the same time, the steep decrease in the pHpzc by Sb(III) adsorption on ferrihydrite suggests that the uncharged Sb(III) is bound strongly to the surface of ferrihydrite by inner-sphere complexation, and the surface complexation between Sb(III) and Fe species is likely the dominating mechanism for Sb(III) adsorption, which would also be consistent with the pH independence of Sb(III) adsorption (Figure 4). An inner-sphere formation for bidentate mononuclear edge-sharing between Sb(III) and HFO was reported by using EXAFS [22]. However, further spectroscopic evidence is necessary to understand the adsorption mechanism of Sb(III) and Sb(V) on the mineral surface in more detail.…”

Section: Sb(iii) and Sb(v) Adsorption In The Absence Of Silicamentioning

confidence: 99%

“…With increasing pH, from 6 to 12, the adsorption rate of Sb(V) rapidly decreased from 90% to 10%. A strong pH dependence on Sb(V) adsorption was reported when goethite and ferrihydrite were used as adsorbents ( [22,35]). The effect of pH on Sb(III) adsorption however was much weaker, showing a constant adsorbed fraction ~95% over the whole of the pH range investigated here, from 3 to 12.…”

Section: Sb(iii) and Sb(v) Adsorption In The Absence Of Silicamentioning

confidence: 99%

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Dissolved Silica Effects on Adsorption and Co-Precipitation of Sb(III) and Sb(V) with Ferrihydrite

2018

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Elevated antimony concentrations in aqueous environments from anthropogenic sources are becoming of global concern. In this respect iron oxides are known to strongly adsorb aqueous antimony species with different oxidation states, but the effect of silica on the removal characteristics is not well understood despite being a common component in the environment. In this study, ferrihydrite was synthesized at various Si/Fe molar ratios to investigate its adsorption and co-precipitation behaviors with aqueous antimony anionic species, Sb(III) and Sb(V). The X-ray diffraction analyses of the precipitates showed two broad diffraction features at approximately 35 • and 62 • 2θ, which are characteristics of 2-line ferrihydrite, but no significant shifts in peak positions in the ferrihydrite regardless of the Si/Fe ratios. The infrared spectra showed a sharp band at~930 cm −1 , corresponding to asymmetric stretching vibrations of Si-O-Fe bonds which increased in intensity with increasing Si/Fe molar ratios. Further, the surface charge on the precipitates became more negative with increasing Si/Fe molar ratios. The adsorption experiments indicated that Sb(V) was preferentially adsorbed under acidic conditions which decreased dramatically with increasing pH while the adsorption rate of Sb(III) ions was independent of pH. However, the presence of silica suppressed the adsorption of both Sb(III) and Sb(V) ions. The results showed that Sb(III) and Sb(V) ions were significantly inhibited by co-precipitation with ferrihydrite even in the presence of silica by isomorphous substitution in the ferrihydrite crystal structure.

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Section: Sb(iii) and Sb(v) Adsorption In The Absence Of Silicasupporting

confidence: 93%

Section: Sb(iii) and Sb(v) Adsorption In The Absence Of Silicamentioning

confidence: 99%

Section: Sb(iii) and Sb(v) Adsorption In The Absence Of Silicamentioning

confidence: 99%

Section: Sb(iii) and Sb(v) Adsorption In The Absence Of Silicamentioning

confidence: 99%

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Dissolved Silica Effects on Adsorption and Co-Precipitation of Sb(III) and Sb(V) with Ferrihydrite

2018

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“…Removal of antimony from water has been highly observed in recent years and many techniques have been explored for this purpose, mainly based on adsorption [8], bioremediation [9], coagulation/flocculation [10], ultrafiltration [11], and ion exchange [12]. Among these techniques, the adsorption is considered as an attractive technique with some significant advantages such as simplicity, low-cost, and eco-friendly [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ce(III)-doped Fe3O4 magnetic particles for efficient removal of antimony from aqueous solution

Joshi

Liu

et al. 2017

Journal of Hazardous Materials

172

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A Review of the Development of Cr, Se, U, Sb, and Te Isotopes as Indicators of Redox Reactions, Contaminant Fate, and Contaminant Transport in Aqueous Systems

Druhan¹,

Basu²,

Jemison³

et al. 2022

Isotopic Constraints on Earth System Processes

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Adsorption of antimony onto iron oxyhydroxides: Adsorption behavior and surface structure

Cited by 321 publications

References 37 publications

Dissolved Silica Effects on Adsorption and Co-Precipitation of Sb(III) and Sb(V) with Ferrihydrite

Dissolved Silica Effects on Adsorption and Co-Precipitation of Sb(III) and Sb(V) with Ferrihydrite

Synthesis of Ce(III)-doped Fe3O4 magnetic particles for efficient removal of antimony from aqueous solution

A Review of the Development of Cr, Se, U, Sb, and Te Isotopes as Indicators of Redox Reactions, Contaminant Fate, and Contaminant Transport in Aqueous Systems

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