Removal of antimonate and antimonite from water by schwertmannite granules

Li, Yonghuan; Mohan, Dinesh; Pittman, Charles U.; Ok, Yong Sik; Dou, Xiaomin

doi:10.1080/19443994.2016.1155176

Cited by 14 publications

(4 citation statements)

References 43 publications

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“…They also used Sch granules to overcome the drawbacks of using small particle-sized adsorbents for SbO 3 3− and SbO 4 3− removal from water. 92 Sch granules were able to remove 32.9 mg g −1 SbO 3 3− and 23.2 mg g −1 SbO 4 3 , which was superior to most reported granular and powdered absorbents. The SbO 3 3− was effectively removed over a wide pH range, while the removal of SbO 4 3− was pH dependent and could be enhanced by lowering the solution pH.…”

Section: Environmental Remediation Applicationmentioning

confidence: 80%

“…With regards to "green chemistry," Sch, especially the synthetic versions, are expected to be utilized in regeneration and recycling processes in the future. Typically, for As remediation, recovery by NaOH solution (0.1-1.0 M), 44,82,92,94 washing with deionized water (>5 times), 51 and dry processing (40-60 C) are common processes that ensure that the adsorbates can be nearly completely separated without the Sch structure being destroyed. It is worth noting that under the alkaline condition, Sch can transform into other phase possibly, which is not discussed too much before.…”

Section: àmentioning

confidence: 99%

See 1 more Smart Citation

Schwertmannite: occurrence, properties, synthesis and application in environmental remediation

Zhang

Bi²,

Li³

et al. 2018

RSC Adv.

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Section: Environmental Remediation Applicationmentioning

confidence: 80%

Section: àmentioning

confidence: 99%

Schwertmannite: occurrence, properties, synthesis and application in environmental remediation

Zhang

Bi²,

Li³

et al. 2018

RSC Adv.

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“…Chemical oxidation yields schwertmannite with a specific surface area of 4–14 m 2 ·g − 1 [ 30 ], 2.06–16.3 m 2 ·g − 1 [ 44 ], 48.2 m 2 ·g − 1 [ 27 ], and even 130.9 m 2 ·g − 1 [ 45 ]. In contrast, rapid hydrolysis enables the synthesis of schwertmannite with a specific surface area several times greater, e.g., 165 m 2 ·g − 1 [ 46 ], 199.4 m 2 ·g − 1 [ 47 ], 206.1 m 2 ·g − 1 [ 29 ], and even 325.5 m 2 ·g − 1 [ 48 ]. The density of SCH A and SCH B was determined using a pycnometer, and amounts to 3.54 and 3.75 g·cm − 3 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Cr(VI) Adsorption Using Synthetic Schwertmannite Obtained by Fe3+ Hydrolysis and Fe2+ Oxidation: Kinetics, Isotherms and Adsorption Mechanism

Ulatowska¹,

Stala²,

Polowczyk³

2021

IJMS

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Good sorption properties and simple synthesis route make schwertmannite an increasingly popular adsorbent. In this work, the adsorption properties of synthetic schwertmannite towards Cr(VI) were investigated. This study aimed to compare the properties and sorption performance of adsorbents obtained by two methods: Fe3+ hydrolysis (SCHA) and Fe2+ oxidation (SCHB). To characterise the sorbents before and after Cr(VI) adsorption, specific surface area, particle size distribution, density, and zeta potential were determined. Additionally, optical micrographs, SEM, and FTIR analyses were performed. Adsorption experiments were performed in varying process conditions: pH, adsorbent dosage, contact time, and initial concentration. Adsorption isotherms were fitted by Freundlich, Langmuir, and Temkin models. Pseudo-first-order, pseudo-second-order, intraparticle diffusion, and liquid film diffusion models were used to fit the kinetics data. Linear regression was used to estimate the parameters of isotherm and kinetic models. The maximum adsorption capacity resulting from the fitted Langmuir isotherm is 42.97 and 17.54 mg·g−1 for SCHA and SCHB. Results show that the adsorption kinetics follows the pseudo-second-order kinetic model. Both iron-based adsorbents are suitable for removing Cr(VI) ions from aqueous solutions. Characterisation of the adsorbents after adsorption suggests that Cr(VI) adsorption can be mainly attributed to ion exchange with SO42− groups.

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“…Likewise, Harris et al reported that schwertmannite preferentially retained Sb in AMD at the Montalbion silver mine (Australia). This ability to retain Sb has spurred interest in the use of schwertmannite for treatment of Sb(V)-contaminated water. − …”

Section: Introductionmentioning

confidence: 99%

Antimony(V) Incorporation into Schwertmannite: Critical Insights on Antimony Retention in Acidic Environments

Rastegari

Karimian

Johnston

et al. 2022

Environ. Sci. Technol.

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This study examines incorporation of Sb(V) into schwertmannitean Fe(III) oxyhydroxysulfate mineral that can be an important Sb host phase in acidic environments. Schwertmannite was synthesized from solutions containing a range of Sb(V)/Fe(III) ratios, and the resulting solids were investigated using geochemical analysis, powder X-ray diffraction (XRD), dissolution kinetic experiments, and extended X-ray absorption fine structure (EXAFS) spectroscopy. Shell-fitting and wavelet transform analyses of Sb K-edge EXAFS data, together with congruent Sb and Fe release during schwertmannite dissolution, indicate that schwertmannite incorporates Sb(V) via heterovalent substitution for Fe(III). Elemental analysis combined with XRD and Fe K-edge EXAFS spectroscopy shows that schwertmannite can incorporate Sb(V) via this mechanism at up to about 8 mol % substitution when formed from solutions having Sb/Fe ratios ≤0.04 (higher ratios inhibit schwertmannite formation). Incorporation of Sb(V) into schwertmannite involves formation of edge and double-corner sharing linkages between SbVO6 and FeIII(O,OH)6 octahedra which strongly stabilize schwertmannite against dissolution. This implies that Sb(V)-coprecipitated schwertmannite may represent a potential long-term sink for Sb in acidic environments.

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Removal of antimonate and antimonite from water by schwertmannite granules

Cited by 14 publications

References 43 publications

Schwertmannite: occurrence, properties, synthesis and application in environmental remediation

Schwertmannite: occurrence, properties, synthesis and application in environmental remediation

Comparison of Cr(VI) Adsorption Using Synthetic Schwertmannite Obtained by Fe3+ Hydrolysis and Fe2+ Oxidation: Kinetics, Isotherms and Adsorption Mechanism

Antimony(V) Incorporation into Schwertmannite: Critical Insights on Antimony Retention in Acidic Environments

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