Persistence of persulfate in karst groundwater and its influencing factors

Environmental Earth Sciences, Год журнала: 2025, Номер 84(7)

Опубликована: Март 17, 2025

Язык: Английский

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The Doping of Ce Improves the Performance of V‐Based Catalysts for Denitration and Chlorobenzene Decomposition

Asia-Pacific Journal of Chemical Engineering, Год журнала: 2025, Номер unknown

Опубликована: Март 24, 2025

ABSTRACT Promoting the collaborative treatment of nitrogen oxides (NO x ) and volatile organic compounds (VOCs) has become an important research direction for multi‐pollutant control (MPC). NO chlorobenzene (CB) were selected as substitutes to study related properties supported vanadium‐titanium (V‐Ti)‐based catalysts, high‐efficiency composite multi‐metal oxide catalysts screened out. The results indicated that addition Ce, Mn, Fe elements could improve denitration catalytic oxidation activity CB. V(3)Ce(5)/Ti had better due formation more oxygen vacancy structure. Denitration removal can reach than 95%. efficiency at 280 °C was investigated under different working conditions. conversion frequency (TOF) CB on catalyst surface follows: CBCO+NO 2 >CBCO>CBCO+NO>CBCO+NH 3 . water sulfur resistance steam inhibited performance catalyst, but promoted CB, reaction reversible. Sulfur dioxide (SO significantly synergistic caused irreversible reaction.

Язык: Английский

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Fenton technology optimization for polycyclic aromatic hydrocarbons degradation in soil

Applied Soil Ecology, Год журнала: 2025, Номер 210, С. 106059 - 106059

Опубликована: Март 31, 2025

Язык: Английский

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Efficient activation of peroxymonosulfate by FeCe bimetallic nanoparticle loaded biochar for high-efficiency acetaminophen degradation

Chemical Engineering Science, Год журнала: 2025, Номер unknown, С. 121604 - 121604

Опубликована: Апрель 1, 2025

Язык: Английский

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Variability of PAH Patterns in Upper Forest Soil (Sub)horizons—A Case Study From South‐Central Poland

Land Degradation and Development, Год журнала: 2024, Номер unknown

Опубликована: Окт. 20, 2024

ABSTRACT Polycyclic aromatic hydrocarbons (PAHs) are a class of contaminants characterized by their persistent and toxic nature. This study examines the variability in PAH distribution patterns upper layers forest soils, focusing on influence different characteristics individual soil (sub)horizons. A total 130 samples were collected from five areas south‐central Poland analyzed for 16 priority PAHs. Samples taken organic fermentative‐humic (Ofh), humic (A), humic‐eluvial (AE) The highest mean concentrations PAHs found subhorizon‐Ofh (Ofh—1547 μg kg −1 , A—1103 AE—109 ). content was significantly correlated with SOM pH, but this correlation only significant horizon‐A. percentage contributions 3‐, 4‐, 5‐, 6‐ring compounds to varied among investigated had contribution PAHs, 4‐ 5‐ring most prevalent horizon‐A, while 3‐ring horizon‐AE. also reflected ratios (BaA/BaA+Chr, IcdP/IcdP+BghiP), confirming behavior these suggests that retention (sub)horizons is influenced several factors, including degree decomposition, mineral fraction, each extent. Our findings reveal knowledge gaps regarding accumulation (sub)horizons, underscoring need further research.

Язык: Английский

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Persistence of persulfate in karst groundwater and its influencing factors

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Окт. 30, 2024

Persulfate (S₂O₈^2-, PS) is a new type of oxidant used for in situ chemical oxidation (ISCO) during the remediation contaminated groundwater. However, PS may be consumed by nontarget matters aquifers, decreasing its persistence and effect. To better understand widely distributed karst microcosm, column, conduit experiments were carried out this study to simulate caves, fracture zones, environments under static or flow water conditions. Karst aquifer matters, including limestone lime soil, novel carbonate rock model employed. decomposition at different concentrations, influencing factors, hydro-chemical responses discussed. The results indicate that (1) In water, half-lives 1, 8, 20 g/L media 102, 185, 202 d, respectively, 19, 34, 51 d soil media, respectively. As injection concentration increased, also increased. half-life range column was 0.05 ~ 0.13 0.36 1.70 indicating exhibited poor flowing (2) pH remained neutral slightly alkaline levels which buffered acidizing effect high concentration. When concentrations 8 g/L, organic matter content soils decreased from an initial 45.57 g/Kg 35.07 24.63 g/Kg, rich greatly with rapid degradation rate constants 20.31 13.47d^-1, (3) led obvious groundwater values dropped minimum 1.4 dissolved oxygen increased 8.5 17.3 mg/L absence solid media. present, stimulated dissolution carbonate, producing Ca²⁺ 8–10 times higher than background value. changes relatively stable

Язык: Английский

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Enhanced Gaseous Benzene Degradation by Bimetallic MIL-101(Fe, Cu) Activated Persulfate System: Efficiency and Mechanism

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2024, Номер unknown, С. 135785 - 135785

Опубликована: Ноя. 1, 2024

Язык: Английский

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Enhanced dimethyl phthalate degradation via mild heat-assisted Bi2Fe4O9 catalyst: Properties and mechanism

Separation and Purification Technology, Год журнала: 2024, Номер unknown, С. 131143 - 131143

Опубликована: Дек. 1, 2024

Язык: Английский

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Persulfate activation by iron complex: A novel non-radical strategy for enhanced tetracycline degradation

Separation and Purification Technology, Год журнала: 2024, Номер unknown, С. 131364 - 131364

Опубликована: Дек. 1, 2024

Язык: Английский

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