Phenol degradation and Sb(V) adsorption by superparamagnetic CTAB-modified iron calcium composite

Environmental Technology & Innovation, Journal Year: 2024, Volume and Issue: 34, P. 103548 - 103548

Published: Jan. 20, 2024

The heavy metal ions and organic dyes in textile wastewater treatment pose a significant environmental burden are challenging to effectively manage. A magnetic cationic surfactant hexadecyltrimethylammonium bromide (CTAB), modified iron-calcium composite (referred as CIC), was prepared using straightforward method from composites raw materials. simultaneous catalytic degradation adsorption efficiency of phenol Sb(V) were evaluated this material. results indicate that under conditions pH 5.0 duration 180 min, both removal rates exceed 90%. Characterization experimental findings reveal CIC possesses properties, facilitating easy separation, offers large surface area, ensuring abundant sites stability. Additionally, can assist the enhanced by H2O2. Pseudo-second-order kinetics describe CIC, while oxidative explain phenol. primary mechanisms involve oxidation through generation hydroxyl radicals H2O2 formation Fe-O-Sb complexes between iron on well precipitation Ca-O-Sb compounds calcium CIC. Therefore, synergistic effect an efficient environmentally friendly for coupled wastewater, presenting broad prospects application treatment.

Language: Английский

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Influences of natural organic acids on the degradation of atrazine in water by pyrite-mediated Fenton oxidation

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 71, P. 107193 - 107193

Published: Feb. 8, 2025

Language: Английский

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Organic Acid-Enhanced Production of Hydroxyl Radicals during H2O2-based Chemical Oxidation for the Remediation of Contaminated Soil

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 490, P. 137793 - 137793

Published: Feb. 28, 2025

Language: Английский

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Freezing-Induced Redistribution of Fe(II) Species within Clay Minerals for Nonlinear Variations in Hydroxyl Radical Yield and Contaminant Degradation

Journal of Earth Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Language: Английский

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Effect mechanism of low-molecular-weight organic acids during sulfidation of As(V)-bearing ferrihydrite

Environmental Pollution, Journal Year: 2025, Volume and Issue: 372, P. 126031 - 126031

Published: March 12, 2025

Language: Английский

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Efficient degradation of soil polycyclic aromatic hydrocarbons by the nZVI/H2O2/OA system: The key role of oxalic acid

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121681 - 121681

Published: April 1, 2025

Language: Английский

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Mineral-Based Advanced Oxidation Processes for Enhancing the Removal of Antibiotic Resistance Genes from Domestic Wastewater

ACS ES&T Water, Journal Year: 2025, Volume and Issue: 5(5), P. 2310 - 2321

Published: April 29, 2025

Wastewater treatment plants (WWTPs) release antibiotic-resistant bacteria (ARB) and genes (ARGs) into the environment. Advanced oxidation processes (AOPs) can remove ARB ARGs, but they often require impractically high chemical or energy use. Here, we explore a low-energy AOP that uses Fe-bearing clay mineral (NAu-1) either combined with H2O2 (H2O2/NAu-1) as prereduced structural Fe (rNAu-1) to degrade selected ARGs (i.e., tetM, tetQ, bla OXA-10), int1 (a mobile genetic element), 16S rRNA gene in postsecondary WWTP effluents. Addition of H2O2/NAu-1 significantly increased tetM removals relative UV irradiation H2O2/UV (p ≤ 0.02). Removals greater doses contact times, reaching maximum values 1.2 2.3 log units at 0.26 10 mM times 4 8 h, respectively. Bacterial regrowth after 24 h was probably due depletion. However, addition rNAu-1 achieved highest removals, up 2.9 0.5 suppressed bacterial over h. Similar were observed under oxic anoxic conditions. Results show mineral-based AOPs offer potential for elevated ARG removal lower demands tertiary wastewater treatment.

Language: Английский

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Synergistic Removal of Cr(VI) Utilizing Oxalated-Modified Zero-Valent Iron: Enhanced Electron Selectivity and Dynamic Fe(II) Regeneration

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(9), P. 669 - 669

Published: April 28, 2025

To address the challenges of environmental adaptability and passivation in nanoscale zero-valent iron (nFe0) systems, we developed oxalate-modified nFe0 (nFeoxa) through a coordination-driven synthesis strategy, aiming to achieve high-efficiency Cr(VI) removal with improved stability reusability. Structural characterization (STEM FT-IR) confirmed formation FeC2O4/nFe0 heterostructure, where oxalate coordinated Fe(II) construct semiconductor interface that effectively inhibits anoxic while enabling continuous electron supply, achieving 100% efficiency within 20 min at an optimal oxalate/Fe molar ratio 1/29. Mechanistic studies revealed ligand accelerates transfer from Fe0 core surface via FeC2O4-mediated pathway, as evidenced by EIS LSV test analyses. This process dynamically regenerates active sites rather than relying on static-free adsorption. XPS STEM further demonstrated was reduced Cr(III) uniformly co-precipitated Fe(II/III)-oxalate complexes, immobilizing chromium. The synergy between protective layer ligand-enhanced endows nFeoxa superior reactivity. work provides ligand-engineering strategy design robust nFe0-based materials for sustainable remediation metal oxyanion-contaminated water.

Language: Английский

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Critical Roles of Low-Molecular-Weight Organic Acid in Enhancing Hydroxyl Radical Production by Ferrous Oxidation on γ-Al2O3 Mineral Surface

Water Research, Journal Year: 2024, Volume and Issue: 261, P. 122052 - 122052

Published: July 5, 2024

Language: Английский

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Comparison of Ti/PbO2 electrode and Ti/RuO2-IrO2 electrode on their electrochemical performance

Journal of Solid State Electrochemistry, Journal Year: 2023, Volume and Issue: 28(7), P. 2011 - 2020

Published: Nov. 4, 2023

Language: Английский

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