The potential of granulated schwertmannite adsorbents to remove oxyanions (SeO32−, SeO42−, MoO42−, PO43−, Sb(OH)6−) from contaminated water

Marouane, Bouchra; Klug, Maria; As, Karel S.; Engel, Jacqueline; Reichel, Susan; Janneck, Eberhard; Peiffer, Stefan

doi:10.1016/j.gexplo.2020.106708

Cited by 14 publications

(9 citation statements)

References 31 publications

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“…[337] Selenite (SeO 3 2− ) and selenate (SeO 4 2− ) are natural species whose trace levels are vital for humans. [338] Given the possible danger of elevated levels of selenium, the U.S. Environmental Protection Agency (EPA) has declared the highest acceptable level of selenium in drinking water (50 ppb). Howarth and coworkers examined the adsorption and removal capacity of several Zr-MOFs for selenite and selenate anions in aqueous media.…”

Section: Removal Of Metalsmentioning

confidence: 99%

Design and Advanced Manufacturing of NU‐1000 Metal–Organic Frameworks with Future Perspectives for Environmental and Renewable Energy Applications

Abazari,

Sanati,

Bajaber

et al. 2023

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Metal–organic frameworks (MOFs) represent a relatively new family of materials that attract lots of attention thanks to their unique features such as hierarchical porosity, active metal centers, versatility of linkers/metal nodes, and large surface area. Among the extended list of MOFs, Zr‐based‐MOFs demonstrate comparably superior chemical and thermal stabilities, making them ideal candidates for energy and environmental applications. As a Zr‐MOF, NU‐1000 is first synthesized at Northwestern University. A comprehensive review of various approaches to the synthesis of NU‐1000 MOFs for obtaining unique surface properties (e.g., diverse surface morphologies, large surface area, and particular pore size distribution) and their applications in the catalysis (electro‐, and photo‐catalysis), CO2 reduction, batteries, hydrogen storage, gas storage/separation, and other environmental fields are presented. The review further outlines the current challenges in the development of NU‐1000 MOFs and their derivatives in practical applications, revealing areas for future investigation.

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Section: Removal Of Metalsmentioning

confidence: 99%

Design and Advanced Manufacturing of NU‐1000 Metal–Organic Frameworks with Future Perspectives for Environmental and Renewable Energy Applications

Abazari,

Sanati,

Bajaber

et al. 2023

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“…Adsorption of Se species was studied at different initial Se concentrations (0.0012, 0.12, 0.66 and 1.2 mM). The initial Se concentrations were selected to cover a range below at, or above the sorption capacity of approximatively 0.15 mmol/g achieved within 48 h for Se(IV) and after more than 140 h for Se(VI) determined in an earlier study [5]. This value reflects extrapolation of Se Freundlich isotherms (Figure S1 and Table S1 in the Supplementary Materials), and is also in accordance with the values determined for arsenite [7] and reflected a maximum solid phase loading of 0.0012, 0.12 and 1.2 mmol/g for single-species experiments and 0.0012, 0.12, 0.66 and 1.2 mmol/g for mixed-species experiments.…”

Section: Selenium Sorption To Different Schwertmannitesmentioning

confidence: 99%

“…Recent experiments with granulated schwertmannite (SHM) [5], a ferric hydroxosulphate mineral (chemical formula Fe 8 O 8 (OH) 8-2x (SO 4 ) x with 1≤ x ≤1.75)) that typically forms under oxic, acidic (pH 2.5-4.5) SO 4 2− and Fe-rich conditions, have demonstrated a large uptake capacity of this mineral of up to 150 µmol Se(IV)/g SHM at pH 3. SHM has proven to be extremely efficient in the removal of dissolved oxyanions [6][7][8][9][10] Hitherto, studies on uptake of Se oxyanions have focussed on ferric (oxyhydro)xides [11][12][13][14][15][16][17][18], whilst mechanistic studies about the interaction between Se oxyanions and SHM are scarce.…”

Section: Introductionmentioning

confidence: 99%

“…Based on Zeta potential observations, they conclude that Se(VI)-like sulphate forms an outer-sphere complex, whereas the other oxyanions (phosphate, arsenate and chromate) form an inner-sphere complex. Marouane et al [5] have investigated the adsorption of Se(IV) on granulated SHM. They observed a two-step kinetic adsorption which they attributed to fast ligand exchange with surface bound sulphate and slower intraparticule diffusion and/or exchange with structural sulphate.…”

Section: Introductionmentioning

confidence: 99%

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Competing Sorption of Se(IV) and Se(VI) on Schwertmannite

et al. 2021

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Schwertmannite (SHM) is a naturally occurring mineral that has been shown to effectively scavenge oxyanions from contaminated water. In this study, Fourier-transform infrared spectroscopy and X-ray absorption spectroscopy techniques in combination with wet-chemical techniques were used to study the competitive sorption of Se(IV) and Se(VI) at pH 3. The experiments were conducted with three types of schwertmannite obtained from oxidative synthesis, biogenic synthesis and high-pressure compaction at different initial Se concentrations and mixing ratios for 48 h and 56 days, respectively. A threshold value for the uptake mechanisms was identified, which reflects the amount of easily exchangeable sulphate (~0.5 mmol/g). At adsorbate concentrations below this threshold, an inner-sphere corner-sharing bidentate binuclear complex forms upon exchange with sulphate. At higher concentrations, both oxyanions become bound to SHM through co-occurrence of mainly inner-sphere and partly outer-sphere corner-sharing bidentate binuclear complexes with Fe(III) containing surface sites. Single species experiments clearly indicate a higher affinity of SHM for Se(IV). However, in mixed species experiments, competitive sorption occurs with equal or even preferential uptake of Se(VI) at concentrations much lower than the threshold value, presumably due to geometrical similarity between selenate and sulphate, and increasing preference for Se(IV) at high Se concentrations.

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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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The potential of granulated schwertmannite adsorbents to remove oxyanions (SeO32−, SeO42−, MoO42−, PO43−, Sb(OH)6−) from contaminated water

Cited by 14 publications

References 31 publications

Design and Advanced Manufacturing of NU‐1000 Metal–Organic Frameworks with Future Perspectives for Environmental and Renewable Energy Applications

Design and Advanced Manufacturing of NU‐1000 Metal–Organic Frameworks with Future Perspectives for Environmental and Renewable Energy Applications

Competing Sorption of Se(IV) and Se(VI) on Schwertmannite

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

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