Stable nZVI-based nanocomposites for adsorption and reduction processes: The case of U(VI) removal

Marco-Brown, Jose L.; Valiente, Rafael; Ramos, Cinthia Paula; Fernández, Marilina; Candal, Roberto

doi:10.1016/j.enmm.2021.100563

Cited by 2 publications

(12 citation statements)

References 54 publications

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“…Similar results were reported before for nZVI-based materials. 20 On the contrary, when using MMT, adsorption was the only phenomenon involved in Cr(VI) removal, as reported in previous research, 61 regardless the negative charge of the Cr(VI) species in solution.…”

Section: Characterization Of the Solidsmentioning

confidence: 65%

“…The amount of each adsorbent was calculated depending on its Fe concentration to obtain the same amount of iron in each setup (268 mg L –1 ) . The iron content in the different samples was determined after digestion with nitric acid for 48 h (0.100 g of the solid/25.0 mL of 5.0 M). The iron concentration in the digestate was measured by flame atomic absorption spectroscopy (Sens AA dual GBC Scientific Equipment).…”

Section: Methodsmentioning

confidence: 99%

“…The analysis of the variation of the ORP is an indicative of the existence of oxidation/reduction processes. 20 When using BioFe-based materials, a decrease in the ORP values after the addition of the material to the reactor vessel were observed, indicating a reductive environment. Similar results were reported before for nZVI-based materials.…”

Section: Characterization Of the Solidsmentioning

confidence: 98%

“…20 However, the synthesis of these nZVI particles sometimes use non-environmentally friendly and expensive reagents as NaBH 4 . 20 In this sense, the use of microorganisms or reducing/adsorptive materials with microbial origin has been explored in previous metal remediation works. For instance, iron-and sulfate-reducing bacteria could be used for the microbially assisted alleviation of arsenic pollution from arsenic-containing ferrihydrite soils 26 or to induce cadmium immobilization via secondary mineralization.…”

Section: Introductionmentioning

confidence: 99%

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One-Pot Green-Synthesis of Supported Reductive Biogenic Iron-Based Materials for the Removal of Cr(VI)

Paronetto,

Olivelli,

Montes

et al. 2024

Ind. Eng. Chem. Res.

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Development of environmentally friendly materials for efficient pollutant removal is crucial. In this work, a new one-pot green-synthesis of iron-based materials with a reductive/adsorption potential was developed and tested for remediation of Cr(VI) in water. Biogenic iron particles (BioFe) and BioFe supported on raw montmorillonite (BioFe-MMT) were synthesized using a ferric reducing bacteria consortium (FRB), and their structures were extensively characterized by Mössbauer spectroscopy, X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Moreover, the microbial community in the consortium was assessed. Results indicated that BioFe-based materials presented dispersed cubic baricite microparticles containing Fe(II) and Ca2+ in their structure, making them ideal for Cr(VI) remediation. The removal efficiency of Cr(VI) from water by a combination of reduction and adsorption processes using the synthesized materials was evaluated through kinetics experiments. The removal of total chromium was more efficient using supported BioFe than using unsupported BioFe and no dependence with dissolved O2 was detected. The preparation of iron particles with excellent chromium removal performance by a new biobased synthesis could lead to a low-cost and environmentally friendly remediation technology.

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Section: Characterization Of the Solidsmentioning

confidence: 65%

Section: Methodsmentioning

confidence: 99%

Section: Characterization Of the Solidsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

One-Pot Green-Synthesis of Supported Reductive Biogenic Iron-Based Materials for the Removal of Cr(VI)

Paronetto,

Olivelli,

Montes

et al. 2024

Ind. Eng. Chem. Res.

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show abstract

“…1b). 30 What is more, the diameters of the CMC-nZVI particles are less than 100 nanometers according to the TEM result, ensuring better migration of CMC-nZVI particles to the contaminated zones. Fig.…”

Section: Characterization Of the Nzvi And Cmc-nzvi Particlesmentioning

confidence: 99%

Preparation of carboxy methyl cellulose stabilized nano-sized zero-valent iron and its properties for in situ remediation of groundwater in areas after acid in situ leach uranium mining

Zhang

Ding

et al. 2023

Environ. Sci.: Water Res. Technol.

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Stable nZVI-based nanocomposites for adsorption and reduction processes: The case of U(VI) removal

Cited by 2 publications

References 54 publications

One-Pot Green-Synthesis of Supported Reductive Biogenic Iron-Based Materials for the Removal of Cr(VI)

One-Pot Green-Synthesis of Supported Reductive Biogenic Iron-Based Materials for the Removal of Cr(VI)

Preparation of carboxy methyl cellulose stabilized nano-sized zero-valent iron and its properties for in situ remediation of groundwater in areas after acid in situ leach uranium mining

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