Acid mine drainage sludge-modified biochar for the efficient removal of As(III) in wastewater: Adsorption performance and mechanism

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 71, P. 107279 - 107279

Published: Feb. 17, 2025

Language: Английский

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Assessing the contribution of Good's buffers to laboratory experiments on Fe(II)aq-induced ferrihydrite transformation

Chemical Geology, Journal Year: 2025, Volume and Issue: unknown, P. 122700 - 122700

Published: Feb. 1, 2025

Language: Английский

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Sunlight-Driven Transformation of Ferrihydrite via Ligand-to-Metal Charge Transfer: The Critical Factors and Arsenic Repartitioning

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Ferrihydrite, a poorly ordered metastable iron oxide, is closely associated with dissolved organic matter (DOM) in soils and sediments. Although sunlight-induced photoreductive dissolution of ferrihydrite via ligand-to-metal charge transfer (LMCT) has been extensively studied, its potential impacts on mineralogical transformation environmental behaviors coexisting contaminants remain largely unknown. Here, we systematically investigated the effects parameters (e.g., solution pH, pO2 level, arsenic speciation, content) representative DOM-oxalate under simulated solar irradiation. Results showed that oxalate-mediated LMCT process synchronously initiated Fe(II) production proton consumption, latter which facilitated interfacial electron atom exchange (IET-AEFh-Fe2+) processes among newly formed Fe(II). At pH 5.0–8.0, was prone to transform into goethite due sufficient (approximately 80–2700 μM) from LMCToxa enough affinity mineral trigger IET-AEFh-Fe2+, while it only underwent reductive at 3.0–5.0 or kept quasi-steady state over 8.0. Increasing level content hampered recrystallization by reducing duration altering surface property ferrihydrite, whereas presence As(III/V) also led formation lepidocrocite As(V) being more prominent. Additionally, chemical extraction As K-edge EXAFS spectroscopy revealed consecutively incorporated structures form regardless primary speciation. These findings shed novel insights low-crystalline oxide element migration driven sunlight natural environments.

Language: Английский

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Release and Redistribution of Arsenic Associated with Ferrihydrite Driven by Aerobic Humification of Exogenous Soil Organic Matter

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Humification of exogenous soil organic matter (ESOM) remodels the compositions and microbial communities soil, thus exerting potential impacts on biogeochemical transformation iron (hydr)oxides associated trace metals. Here, we conducted a 70-day incubation experiment to investigate how aerobic straw humification influenced repartitioning arsenic (As) with ferrihydrite in paddy soil. Results showed that was characterized by rapid OM degradation (1-14 days) subsequent slow maturation (14-70 days). During stage, considerable As (13.1 mg·L-1) released into aqueous phase, which reimmobilized solid phase stage. Meanwhile, low-crystalline structural As/Fe converted more stable species, subtle crystalline transformation. The generated highly unsaturated phenolic compounds enriched Enterobacter Sphingomonas induced (∼3.1%) As(V) reduction, leading release during In carboxylic-rich alicyclic molecules facilitated reimmobilization. Throughout process, organo-mineral complexes formed between via C-O-Fe bond contributed solid-phase stabilization. Collectively, this work highlighted ESOM humification-driven (hydr)oxide redistribution, advancing our understanding coupled behaviors C, Fe,

Language: Английский

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Antimony and arsenic interactions with iron oxides and aluminum oxides in surface environment: A review focused on processes and mechanisms

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 979, P. 179423 - 179423

Published: April 22, 2025

Language: Английский

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Lanthanum substitution enhances the intrinsic phosphate-adsorption capacity of hydrated ferric oxide via increasing Fe electron density

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162818 - 162818

Published: April 1, 2025

Language: Английский

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Iron (Hydr)oxide-Enriched Biochar for Arsenic Immobilization Under Microbial Iron Reduction and Fluctuating Redox Conditions

ACS ES&T Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Language: Английский

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Ligand exchange by As(V) enhanced desferrioxamine B-induced goethite dissolution: Insights into As mobilization in groundwater systems

Applied Geochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 106412 - 106412

Published: May 1, 2025

Language: Английский

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Enhanced retention of arsenite and arsenate through heterogeneous interactions between Fe(III) (Hydr)Oxides and black carbon: a multi-mechanistic study

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163684 - 163684

Published: May 1, 2025

Language: Английский

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Interfacial reactions and speciation identification during arsenic treated with nanoscale zerovalent iron (nZVI) in water: A review

Water Research, Journal Year: 2025, Volume and Issue: unknown, P. 123829 - 123829

Published: May 1, 2025

Language: Английский

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