Facile synthesis of high iron content activated carbon-supported nanoscale zero-valent iron for enhanced Cr(VI) removal in aqueous solution

Xu, Yan; Liu, Zheming; Ma, Kexin; Qin, Qingdong

doi:10.1016/j.chemosphere.2021.132709

Cited by 15 publications

(2 citation statements)

References 24 publications

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“…Hydrophobic supports also extend the reactivity of nanoparticles and enable the adsorption of hydrophobic contaminants like PCBs onto the nZVI surface. Materials such as phyllosilicate minerals [225], granitic residual [226], silica [227], activated carbon [228], zeolites [229], biochar [230] or polymer membranes have been utilized as supports for nZVIs. Immobilization of nZVIs on these supports can be achieved through carboxyl, hydroxyl, or amine groups serving as chelating sites.…”

Section: Fixed Supportmentioning

confidence: 99%

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Rodríguez-Rasero,

Montes-Jimenez,

Alexandre-Franco

et al. 2024

Water

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This review article addresses the increasing environmental concerns posed by synthetic dyes in water, exploring innovative approaches for their removal with a focus on zero-valent iron nanoparticles (nZVIs) synthesized through environmentally friendly methods. The article begins by highlighting the persistent nature of synthetic dyes and the limitations of conventional degradation processes. The role of nanoparticles in environmental applications is then discussed, covering diverse methods for metallic nanoparticle production aligned with green chemistry principles. Various methods, including the incorporation of secondary metals, surface coating, emulsification, fixed support, encapsulation, and electrostatic stabilization, are detailed in relation to the stabilization of nZVIs. A novel aspect is introduced in the use of plant extract or biomimetic approaches for chemical reduction during nZVI synthesis. The review investigates the specific challenges posed by dye pollution in wastewater from industrial sources, particularly in the context of garment coloring. Current approaches for dye removal in aqueous environments are discussed, with an emphasis on the effectiveness of green-synthesized nZVIs. The article concludes by offering insights into future perspectives and challenges in the field. The intricate landscape of environmentally friendly nZVI synthesis has been presented, showcasing its potential as a sustainable solution for addressing dye pollution in water.

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Section: Fixed Supportmentioning

confidence: 99%

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Rodríguez-Rasero,

Montes-Jimenez,

Alexandre-Franco

et al. 2024

Water

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“…Effective application of nZVI requires an appropriate support medium for fixation and dispersion. For this purpose, materials with high surface-to-volume ratios, such as activated carbon, graphite, and clay, have been extensively used in the field of pollution remediation as nZVI support materials [16][17][18]. ATP is a kind of hydrated magnesiumrich silicate clay mineral; it has a specific crystal structure and special surface charge distribution characteristics, and has strong adsorption and ion exchange performance [19].…”

Section: Introductionmentioning

confidence: 99%

Mechanism-Enhanced Active Attapulgite-Supported Nanoscale Zero-Valent Iron for Efficient Removal of Pb2+ from Aqueous Solution

et al. 2022

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In this study, attapulgite-supported nano zero-valent iron (nZVI@ATP) was synthesized by a liquid-phase reduction method using active attapulgite (ATP) as raw material, and used for Pb2+ remediation in aqueous solution. To understand the mechanism of Pb2+ removal, various techniques were used to characterize nZVI@ATP. The results showed that spherical nZVI particles were uniformly dispersed on the surface of ATP, and the agglomeration of nZVI particles was significantly weakened. The adsorption performance of nZVI@ATP for Pb2+ was greatly improved compared with that of ATP ore, in which the Fe/ATP mass ratio of 1:2 was the best loading ratio. Under the conditions of a temperature of 25 °C and a pH of 5.00, the initial concentration of Pb2+ was 700 mg/L, and the Pb2+ removal rate of nZVI@ATP was 84.47%. The adsorption of nZVI@ATP to Pb2+ was mainly a spontaneous endothermic reaction of heterogeneous surfaces, and the adsorption rate of nZVI@ATP to Pb2+ was proportional to pH in the range of 2–5.5. The presence of Na+, Mg2+, and Ca2+ can inhibit the removal of Pb2+, and Ca2+ has the strongest inhibition effect on the removal of Pb2+. The removal mechanism of Pb2+ by nZVI@ATP obtained from SEM-EDS, BET, XRD, FTIR and XPS included reduction, precipitation, and the formation of complexes.

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New consideration on the application of nano-zero-valent iron (nZVI) in groundwater remediation: refractions to existing technologies

Xu,

Zanli,

Chen

2024

J Nanopart Res

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Facile synthesis of high iron content activated carbon-supported nanoscale zero-valent iron for enhanced Cr(VI) removal in aqueous solution

Cited by 15 publications

References 24 publications

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Mechanism-Enhanced Active Attapulgite-Supported Nanoscale Zero-Valent Iron for Efficient Removal of Pb2+ from Aqueous Solution

New consideration on the application of nano-zero-valent iron (nZVI) in groundwater remediation: refractions to existing technologies

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