WO₃ as an Electron Exchange Matrix: A Novel and Efficient Treatment Method for Nitro Compounds

ACS Omega, Год журнала: 2025, Номер unknown

Опубликована: Март 13, 2025

To minimize the use of chemicals that have traditionally been needed to treat toxic organic compounds, a WO3 electron exchange matrix (EEMWO3), which requires fewer chemical solvents in line with green chemistry engineering principles, was developed for waste degradation. The EEMWO3 tested its ability remove 4-nitrophenol and 2-nitrophenol, were chosen as models common oxidizing compounds. nitrophenol added an initial amount 7.19 × 10-5 mol, is larger concentration than reported cause health problems. conversion values ∼(10-50)%, depending on type substrate used. Ca. 10% units observed be reduced by BH4 - W(V), value orders magnitude better previously EEM. results indicate structure surface area are important parameters degradation process. monoclinic hydrotungstite (WO2(OH)2·H2O) reactive species. same also affected recyclability process, three cycles possible commercial WO3. tungsten oxide functioned active EEM without entrapped redox species skeleton, indicating one does not worry about number can matrix. It concluded efficient treatment method toxic, compounds it greener whose conventional methods.

Язык: Английский

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A green sulfidated micro zero-valent iron based-hydrogel for the synergistic removal of heavy metal cations and anions in groundwater

The Science of The Total Environment, Год журнала: 2025, Номер 972, С. 179096 - 179096

Опубликована: Март 14, 2025

Язык: Английский

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Sulfidated zero-valent iron bimetals for passive remediation of chlorinated vapors in the subsurface

Environmental Pollution, Год журнала: 2025, Номер unknown, С. 126202 - 126202

Опубликована: Апрель 1, 2025

This study explores a novel application of sulfidated zero-valent iron (S-ZVI) bimetals for the treatment chlorinated solvents in vapor phase. The potential these reactive materials was investigated through batch, column, and modeling tests. were produced by disc milling ZVI, sulfur (S), copper (Cu), nickel (Ni) with molar ratios 0.05 0.2. reactivity assessed degradation batch tests conducted under partially saturated conditions using trichloroethylene (TCE) as model compound. Sulfidated S/ZVI ratio most reactive, achieving up to 99% TCE vapors within 18 hours first-order constants 5-5.7 d-1. Compared non-sulfidated materials, ones remained even after aging exposure air 30 days. In all tests, C3-C6 hydrocarbons detected main byproducts, indicating β-elimination dominant pathway, minor dichloroethylene vinyl chloride amounts from hydrogenolysis pathway. To evaluate use Horizontal Permeable Reactive Barriers (HPRBs) treating subsurface, diffusion column performed 5 cm thick layer S-ZVI-Ni. These demonstrated 70% over 25 By integrating test results into an analytical model, it estimated that HPRB could ensure vapors. findings highlight S-ZVI effective passive mitigation system reducing solvent emissions subsurface.

Язык: Английский

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Zero-valent iron-based materials for enhanced reductive removal of contaminants: From the trial-and-error synthesis to rational design

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер unknown, С. 124901 - 124901

Опубликована: Дек. 1, 2024

Язык: Английский

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S-ZVI@biochar constructs a directed electron transfer channel between dechlorinating bacteria, Shewanella oneidensis MR-1 and trichloroethylene

npj Clean Water, Год журнала: 2024, Номер 7(1)

Опубликована: Авг. 31, 2024

The combination of micron zero-valent iron (mZVI) and microorganisms is an effective method for trichloroethylene (TCE) degradation, but electron transfer efficiency needs improvement. A new chem-bio hybrid process using a composite material (S-ZVI@biochar) was developed, consisting sulfurized mZVI biochar as chemical remover, Shewanella oneidensis MR-1 dechlorinating bacteria (DB) biological agent TCE degradation. S-ZVI@biochar showed improved stability, biocompatibility, removal compared to ZVI S-ZVI. system DB + exhibited the highest at 96.5% after 30 days, which 3.7 times higher than that bare ZVI. study revealed enhanced dechlorination performance due efficiency, adjustment microbial community structure, recycling. constructed transport channels in system, improving overall capacity. This shows promise long-term anaerobic environments.

Язык: Английский

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Efficient nitrate removal via microorganism-iron oxide co-evolution on biocathode surface

Bioelectrochemistry, Год журнала: 2024, Номер 163, С. 108889 - 108889

Опубликована: Дек. 25, 2024

Язык: Английский

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