A Light Touch: Solar Photocatalysis Detoxifies Oil Sands Process-Affected Waters Prior to Significant Treatment of Naphthenic Acids

ACS ES&T Water, Год журнала: 2024, Номер 4(4), С. 1483 - 1497

Опубликована: Фев. 23, 2024

Environmental reclamation of Canada's oil sands tailings ponds is among the single largest water treatment challenges globally. The toxicity process-affected (OSPW) has been associated with its dissolved organics, a complex mixture naphthenic acid fraction components (NAFCs). Here, we evaluated solar buoyant photocatalysts (BPCs) as passive advanced oxidation process (P-AOP) for OSPW remediation. Photocatalysis fully degraded acids (NAs) and extractable organics (AEO) in 3 different samples. However, classical NAs AEO, traditionally considered principal toxicants OSPW, were not correlated herein. Instead, nontarget petroleomic analysis revealed that low-polarity organosulfur compounds, composing <10% total apparently accounted majority waters' to fish, described by model tissue partitioning. These findings have implications release, which less extensive but more selective may be required than previously expected.

Язык: Английский

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Low-temperature biodegradation of freshwater dissolved organic matter during winter-to-spring transition

Frontiers in Environmental Science, Год журнала: 2025, Номер 12

Опубликована: Фев. 12, 2025

The composition of dissolved organic matter (DOM) directly affects the biological degradation processes and its persistence in aquatic systems. Spring floods export large amounts DOM from land into systems, yet lability remains largely unknown. This study uniquely investigates biodegradation during critical winter-to-spring transition seasonally ice-covered marsh lake environments. We employed a four-bacteria strain inoculum ( Arthrobacter phenanthrenivorans , Bacillus licheniformis Exiguobacterium sibiricum Paracoccus denitrificans) to degrade collected this period. Using advanced optical molecular characteristics techniques, we demonstrated significant bioalteration at low temperatures (4°C), which are naturally associated with early spring cold temperate lakes wetlands. Despite limited colored fluorescent (CDOM FDOM, respectively), 84% mass-to-charge (m/z) peaks detected using positive ion mass spectrometry were lost winter after 28-day incubation. Biodegradation ranged 74% 77% freshet, lowest microbial alteration observed downstream end melt season, likely due increased primary production. These findings highlight role transformation periods rapid hydrological change, providing insights carbon cycling ecosystem dynamics

Язык: Английский

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Integrated analytical workflow for quantifying and modeling the hydrocracking of vacuum gas oil and plastic pyrolysis oil

Fuel, Год журнала: 2025, Номер 400, С. 135557 - 135557

Опубликована: Май 26, 2025

Язык: Английский

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Analytics Driving Kinetics: Advanced Mass Spectrometric Characterization of Petroleum Products

Energy & Fuels, Год журнала: 2021, Номер 36(1), С. 6 - 59

Опубликована: Дек. 21, 2021

The current state-of-the-art analysis techniques for petroleum fractions has progressed substantially during the past decade. This helped to further improve lumping procedures and modeling approaches of these complex systems. Recent advances in gas chromatography (GC), GC-field ionization mass spectrometry (GC-FIMS), comprehensive (GC×GC) have made it possible determine compositions with up 45 carbon atoms some cases C80. combination MS other selective detectors reversed-phase column combinations quantify even traces heteroatomic compounds hydrocarbon matrices. Fourier-transform ion cyclotron resonance (FT-ICR-MS), combined GC×GC lighter part, pushed characterization larger macromolecules particular asphaltenes. Matrix-assisted laser desorption/ionization (MALDI) is also used widely this purpose but disadvantage that quantification not obvious. development more detailed remained unnoticed petrochemical society recently kinetic society. More implementation models simulation optimization including molecular detail. Additionally, photoionization (PI-MS) allowed detection reactive intermediates direct measurements time-resolved experiments. It can only be expected trend will continue application field move from now primarily petrochemistry (from catalytic cracking, over hydrotreating, hydrocracking pyrolysis, combustion, steam cracking) larger-scale chemical recycling biomass conversion processes.

Язык: Английский

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Modern analytical techniques are improving our ability to follow the fate of spilled oil in the environment

Current Opinion in Chemical Engineering, Год журнала: 2022, Номер 36, С. 100787 - 100787

Опубликована: Янв. 12, 2022

Язык: Английский

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