Recent Advances in Sulfidated Zerovalent Iron for Contaminant Transformation

Environmental Science & Technology, Год журнала: 2021, Номер 55(13), С. 8464 - 8483

Опубликована: Июнь 25, 2021

2021 marks 10 years since controlled abiotic synthesis of sulfidated nanoscale zerovalent iron (S-nZVI) for use in site remediation and water treatment emerged as an area active research. It was then expanded to microscale ZVI (S-mZVI) together with S-nZVI, they are collectively referred S-(n)ZVI. Heightened interest S-(n)ZVI stemmed from its significantly higher reactivity chlorinated solvents heavy metals. The extremely promising research outcomes during the initial period (2011-2017) led renewed (n)ZVI-based technologies treatment, explosion new last four (2018-2021) that is building understanding novel complex role sulfides enhancing (n)ZVI. Numerous studies have focused on exploring different approaches, colloidal, surface, (electrochemistry, contaminant selectivity, corrosion) properties. This review provides a critical overview recent milestones technology development: (i) clear insights into transformation long-term aging, (ii) impact sulfidation methods particle characteristics reactivity, (iii) broader range treatable contaminants, (iv) complete decontamination, (v) ecotoxicity, (vi) field implementation. In addition, this discusses major knowledge gaps future avenues opportunities.

Язык: Английский

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Peroxymonosulfate activation through LED-induced ZnFe2O4 for levofloxacin degradation

Chemical Engineering Journal, Год журнала: 2021, Номер 417, С. 129225 - 129225

Опубликована: Март 7, 2021

Язык: Английский

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Sustainable remediation and redevelopment of brownfield sites

Nature Reviews Earth & Environment, Год журнала: 2023, Номер 4(4), С. 271 - 286

Опубликована: Март 28, 2023

Язык: Английский

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Sulfidized Nanoscale Zero-Valent Iron: Tuning the Properties of This Complex Material for Efficient Groundwater Remediation

Accounts of Materials Research, Год журнала: 2021, Номер 2(6), С. 420 - 431

Опубликована: Июнь 1, 2021

ConspectusGroundwater contamination by halogenated organic compounds, especially chlorinated and fluorinated ones, threatens freshwater sources globally. Nanoscale zero-valent iron (NZVI) has been extensively studied (>5000 publications) deployed for in situ groundwater remediation, but NZVI selectivity contaminants is poor, reactive lifetimes are short, it cannot promote defluorination reactions. Recently, sulfidized (SNZVI) emerged, revitalized academic industrial interests this material remediation. Sulfidation broadens the range of contaminants, significantly increases lifetime 2 orders magnitude, while inhibiting undesirable H2 evolution reaction between Fe0 water. This Account provides a state-of-the-art understanding chemical properties controlling reactivity SNZVI will advance field toward rational design efficient remediation materials.SNZVI complex mixture body-centered cubic (BCC) metallic unspecified sulfides. Most published research aimed at exploring breadth its various environmental rather than factors that influence materials. Recent works from our laboratory have tuning synthesis conditions to control amount speciation sulfur structure, elucidating how these structural changes result physicochemical (e.g., hydrophobicity, electron-transfer resistance, H adsorption sites) provide desirable important contaminants.This explains reasons more compared NZVI. The degradation pathways, sites (Fe or S species (direct electron transfer atomic H) dechlorination trichloroethene florfenicol determined batch experiments, theoretical calculations, analysis products. A better why with C–F bonds under ambient may also use derivatives emerging contaminants.Finally, guidance measuring reporting SNZVI. enable comparisons future studies elucidate differences synthesized different groups. Overall, unveils structure–property–performance relationships SNZVI, makes strides controlled robust tailored specific application scenarios, mechanistic insights into materials contaminants.

Язык: Английский

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Atomic Hydrogen in Electrocatalytic Systems: Generation, Identification, and Environmental Applications

Water Research, Год журнала: 2022, Номер 223, С. 118994 - 118994

Опубликована: Авг. 18, 2022

Язык: Английский

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A multiple Kirkendall strategy for converting nanosized zero-valent iron to highly active Fenton-like catalyst for organics degradation

Proceedings of the National Academy of Sciences, Год журнала: 2023, Номер 120(39)

Опубликована: Сен. 19, 2023

Nanosized zero-valent iron (nZVI) is a promising persulfate (PS) activator, however, its structurally dense oxide shell seriously inhibited electrons transfer for O-O bond cleavage of PS. Herein, we introduced sulfidation and phosphorus-doped biochar breaking the pristine with formation FeS FePO 4 -containing mixed shell. In this case, faster diffusion rate atoms compared to components triggered multiple Kirkendall effects, causing inward fluxion vacancies further coalescing into radial nanocracks. Exemplified by trichloroethylene (TCE) removal, such unique “lemon-slice-like” nanocrack structure favored fast outward ferrous ions across PS activation high-efficient generation utilization reactive species, as evidenced effective dechlorination (90.6%) mineralization (85.4%) TCE. O 2 • - contributed most TCE decomposition, moreover, SnZVI@PBC gradually became electron-deficient thus extracted from achieving nonradical-based degradation. Compared nZVI/PS process, SnZVI@PBC/PS system could significantly reduce catalyst dosage (87.5%) amount (68.8%) achieve nearly complete degradation, was anti-interference, stable, pH-universal. This study advanced mechanistic understandings effects-triggered on nZVI corresponding rational design Fenton-like catalysts organics

Язык: Английский

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Lattice engineered nanoscale Fe0 for selective reductions

Nature Water, Год журнала: 2024, Номер 2(1), С. 84 - 92

Опубликована: Янв. 4, 2024

Язык: Английский

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Recent advances on nano-adsorbents and nanomembranes for the remediation of water

Journal of Cleaner Production, Год журнала: 2021, Номер 322, С. 129051 - 129051

Опубликована: Сен. 16, 2021

Язык: Английский

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A stable biochar supported S-nZVI to activate persulfate for effective dichlorination of atrazine

Chemical Engineering Journal, Год журнала: 2021, Номер 431, С. 133937 - 133937

Опубликована: Дек. 3, 2021

Язык: Английский

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S-doped MIL-53 as efficient heterogeneous electro-Fenton catalyst for degradation of sulfamethazine at circumneutral pH

Journal of Hazardous Materials, Год журнала: 2021, Номер 424, С. 127674 - 127674

Опубликована: Ноя. 3, 2021

Язык: Английский

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