A critical review on arsenic removal from water using iron-based adsorbents
TLDR
In this article, the authors focused on the removal of arsenic from water using iron-based materials, such as iron nanoparticles, layered double hydroxides (LDHs), zero-valent iron (ZVI), iron-doped activated carbon, iron-depleted polymer/biomass materials, and iron-containing combined metal oxides.Abstract:
Intensive research efforts have been pursued to remove arsenic (As) contamination from water with an intention to provide potable water to millions of people living in different countries. Recent studies have revealed that iron-based adsorbents, which are non-toxic, low cost, and easily accessible in large quantities, offer promising results for arsenic removal from water. This review is focused on the removal of arsenic from water using iron-based materials such as iron-based nanoparticles, iron-based layered double hydroxides (LDHs), zero-valent iron (ZVI), iron-doped activated carbon, iron-doped polymer/biomass materials, iron-doped inorganic minerals, and iron-containing combined metal oxides. This review also discusses readily available low-cost adsorbents such as natural cellulose materials, bio-wastes, and soils enriched with iron. Details on mathematical models dealing with adsorption, including thermodynamics, kinetics, and mass transfer process, are also discussed. For elucidating the adsorption mechanisms of specific adsorption of arsenic on the iron-based adsorbent, X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) are frequently used. Overall, iron-based adsorbents offer significant potential towards developing adsorbents for arsenic removal from water.read more
Citations
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KOH-activated porous biochar with high specific surface area for adsorptive removal of chromium (VI) and naphthalene from water: Affecting factors, mechanisms and reusability exploration
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TL;DR: The PBCKOH was believed to enhance the Cr(VI) adsorption mainly through the combination of electrostatic attraction, complexation, ion exchange and reduction action, while achieving the high NAP uptake by pore filling and π-π stacking interactions.
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Green synthesis of hydrophilic activated carbon supported sulfide nZVI for enhanced Pb(II) scavenging from water: Characterization, kinetics, isotherms and mechanisms.
Jianhua Qu,Yang Liu,Cheng Li,Zhao Jiang,Guangshan Zhang,Fengxia Deng,Lei Wang,Wei Han,Ying Zhang +8 more
TL;DR: The hydrophilic porous activated carbon supported sulfide nZVI was believed to enhance the Pb(II) uptake via the synergistic effects of electrostatic attraction, chemical precipitation, complexation and reduction as well as pH-dependent adsorption performance.
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Metal-organic frameworks for aquatic arsenic removal
Chenghong Wang,J. Luan,C. Wu +2 more
TL;DR: Overall, this class of materials demonstrates a promising potential for aquatic arsenic removal, and with a proper up-scaling development might it be used for practical applications in the near future.
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Selective removal of arsenic in water: A critical review
TL;DR: A sustainable selective mitigation method should be considered concerning the economic resources available, the ability of infrastructure to sustain water treatment, and the options for reuse and/or safe disposal of treatment residuals.
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Advanced Functional Nanostructures based on Magnetic Iron Oxide Nanomaterials for Water Remediation: A Review.
TL;DR: This critical review presents a contribution to the emerging knowledge concerning the theoretical and experimental studies on the toxicity of MIONs and provides comprehensive coverage of the recent progress on designing and developing iron oxide-based nanomaterials through a green synthesis strategy, including the use of benign solvents and ligands.
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