Chromium removal from aqueous solutions using new silica gel conjugates of desferrioxamine or diethylenetriaminepentaacetic acid

Rasheed, Aamir; Carvalho, André Castro; Carvalho, Gabriel Gustinelli Arantes de; Ghous, Tahseen; Nomura, Cassiana Seimi; Espósito, Breno Pannia

doi:10.1007/s11356-020-08097-5

Cited by 12 publications

(7 citation statements)

References 62 publications

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“…DFOB binds most strongly to iron(III), forming a stable, brick-colored, octahedral complex called ferrioxamine B ( logβ Fe(III).DFOB ) = 30.4) . In addition to iron, this siderophore was successfully used, either in solution or anchored to support, to chelate aluminum(III), zirconium(IV), vanadium(V), uranium(VI), chromium, and gallium, , among other metals. Given that DFOB’s terminal amino group does not participate in the complexation of metal ions, multiple studies have targeted this N-terminus to covalently attach DFOB to different molecules and surfaces. − The benefits of grafting DFOB to molecules and surfaces include different therapeutic, environmental, and industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Reversible Covalent Binding of Desferrioxamine B (DFOB) to Polystyrene Microspheres for the Chelation of Aqueous Iron Citrate

Touma,

Kelly,

Coblyn

et al. 2023

Ind. Eng. Chem. Res.

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Desferrioxamine B (DFOB) was reversibly and covalently conjugated to polystyrene microspheres via Nsuccinimidyl 3-(2-pyridyldithio)propionate (SPDP) crosslinker. DFOB retained post-immobilization activity with at least 89% able to bind Fe(III)-citrate under pH 7.4 and a citrate:iron molar ratio = 100:1. Comparing iron capture by DFOB-activated beads and sulfhydryl (−SH) control beads demonstrated exclusive iron chelation by surface DFOB molecules. Support regeneration was achieved by cleaving the disulfide bonds linking the spent chelators to the surface with dithiothreitol (DTT) and then recoupling to fresh DFOB. This process did not significantly change iron uptake after two uses. The Langmuir isotherm described the adsorption data with maximum iron coverage of 3.7 × 10 −3 mmol Fe(III) / g adsorbent . DFOB immobilization significantly reduced the chelation rate; 30 and 180 min were required to reach equilibrium chelation levels with free and immobilized DFOB, respectively. The chelation rate decrease was attributed to a surface hindrance of DFOB's iron complexation mechanism and the reduced access to the supernatant bulk. It is anticipated that future systems tailored for specific DFOB applications can utilize the developed reversible attachment for flexible chelator regeneration, in addition to support reusability and preservation.

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Section: Introductionmentioning

confidence: 99%

Reversible Covalent Binding of Desferrioxamine B (DFOB) to Polystyrene Microspheres for the Chelation of Aqueous Iron Citrate

Touma,

Kelly,

Coblyn

et al. 2023

Ind. Eng. Chem. Res.

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“…Studies have shown the effectiveness of materials modification by Si gel for Cr ions adsorption. The presence of hydroxyl and silanol groups on the Si gel surface enhanced its affinity towards Cr ions adsorption [ 20 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites

et al. 2021

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Chitosan (Cs)-based composites were developed by incorporating silica (Cs–Si), and both silica and hydroxyapatite (Cs–Si–Hap), comparatively tested to sequester hexavalent (Cr(VI)) ions from water. XRD and FT-IR data affirmed the formation of Cs–Si and Cs–Si–Hap composite. Morphological images exhibits homogeneous Cs–Si surface, decorated with SiO2 nanoparticles, while the Cs–Si–Hap surface was non-homogeneous with microstructures, having SiO2 and Hap nanoparticles. Thermal analysis data revealed excellent thermal stability of the developed composites. Significant influence of pH, adsorbent dose, contact time, temperature, and coexisting anions on Cr(VI) adsorption onto composites was observed. Maximum Cr(VI) uptakes on Cs and developed composites were observed at pH 3. The equilibration time for Cr(VI) adsorption on Cs–Si–Hap was 10 min, comparatively better than Cs and Cs–Si. The adsorption data was fitted to pseudo-second-order kinetic and Langmuir isotherm models with respective maximum monolayer adsorption capacities (qm) of 55.5, 64.4, and 212.8 mg/g for Cs, Cs–Si, and Cs–Si–Hap. Regeneration studies showed that composites could be used for three consecutive cycles without losing their adsorption potential.

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“…There are several accepted methods for removing Cr(VI), which typically exists as highly soluble and toxic chromate anions (HCrO 4 – or Cr 2 O 7 2– ), from industrial wastewater: photocatalytic reduction, ,− chemical precipitation, electrokinetic remediation, membrane filtration, , and adsorption. − Among these methods, adsorption is especially appealing, as it is very effective at removing Cr(VI) . The adsorption process requires a solid surface (i.e., an adsorbent) with a large surface area for the species to be adsorbed (i.e., an adsorbate) to attach to, either by physical or chemical processes, for which in here, the use of a nanosized material will be beneficial for providing the surface area.…”

Section: Introductionmentioning

confidence: 99%

“…15−17 Among these methods, adsorption is especially appealing, as it is very effective at removing Cr(VI). 18 The adsorption process requires a solid surface (i.e., an adsorbent) with a large surface area for the species to be adsorbed (i.e., an adsorbate) to attach to, either by physical or chemical processes, for which in here, the use of a nanosized material will be beneficial for providing the surface area. Nanostructured materials can be defined as a material having an internal nanostructure or a surface nanostructure and present themselves as attractive large-surface-area adsorbents for this purpose, of which one-dimensional nanostructures, such as nanowires (NWs), are particularly effective.…”

Section: Introductionmentioning

confidence: 99%

Formation of Dense and High-Aspect-Ratio Iron Oxide Nanowires by Water Vapor-Assisted Thermal Oxidation and Their Cr(VI) Adsorption Properties

et al. 2021

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Coral-like and nanowire (NW) iron oxide nanostructures were produced at 700 and 800 °C, respectively, through thermal oxidation of iron foils in air- and water vapor-assisted conditions. Water vapor-assisted thermal oxidation at 800 °C for 2 h resulted in the formation of highly crystalline α-Fe2O3 NWs with good foil surface coverage, and we propose that their formation was due to a stress-driven surface diffusion mechanism. The Cr(VI) adsorption property of an aqueous solution on α-Fe2O3 NWs was also evaluated after a contact time of 90 min. The NWs had a removal efficiency of 97% in a 225 mg/L Cr(VI) solution (pH 2, 25 °C). The kinetic characteristic of the adsorption was fitted to a pseudo-second-order kinetic model, and isothermal studies indicated that the α-Fe2O3 NWs exhibited an adsorption capacity of 66.26 mg/g. We also investigated and postulated a mechanism of the Cr(VI) adsorption in an aqueous solution of α-Fe2O3 NWs.

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Chromium removal from aqueous solutions using new silica gel conjugates of desferrioxamine or diethylenetriaminepentaacetic acid

Cited by 12 publications

References 62 publications

Reversible Covalent Binding of Desferrioxamine B (DFOB) to Polystyrene Microspheres for the Chelation of Aqueous Iron Citrate

Reversible Covalent Binding of Desferrioxamine B (DFOB) to Polystyrene Microspheres for the Chelation of Aqueous Iron Citrate

A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites

Formation of Dense and High-Aspect-Ratio Iron Oxide Nanowires by Water Vapor-Assisted Thermal Oxidation and Their Cr(VI) Adsorption Properties

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