The Science of The Total Environment, Год журнала: 2023, Номер 909, С. 168604 - 168604
Опубликована: Ноя. 17, 2023
Язык: Английский
Environmental Science & Technology, Год журнала: 2022, Номер 56(16), С. 11111 - 11131
Опубликована: Июль 7, 2022
Advanced oxidation processes (AOPs) can degrade a wide range of trace organic contaminants (TrOCs) to improve the quality potable water or discharged wastewater effluents. Their effectiveness is impacted, however, by dissolved matter (DOM) that ubiquitous in all sources. During application an AOP, DOM scavenge radicals and/or block light penetration, therefore impacting their toward contaminant transformation. The multiple ways which different types sources impact oxidative purification are critically reviewed. inhibit degradation TrOCs, but it also enhance formation and reactivity useful for elimination alter transformation pathways contaminants. An in-depth analysis highlights inhibitory effect on efficiency TrOCs based DOM's structure optical properties its oxidants as well synergistic contribution from redox transient intermediates. AOPs influence types, mechanisms, extent byproducts formation. Research needs proposed advance practical understanding how be exploited purification.
Язык: Английский
Процитировано
252
Environmental Science & Technology, Год журнала: 2024, Номер 58(10), С. 4637 - 4647
Опубликована: Март 1, 2024
Marine dissolved organic matter (DOM) is an important component of the global carbon cycle, yet its intricate composition and sea salt matrix pose major challenges for chemical analysis. We introduce a direct injection, reversed-phase liquid chromatography ultrahigh resolution mass spectrometry approach to analyze marine DOM without need solid-phase extraction. Effective separation achieved with large chromatographic column extended isocratic aqueous step. Postcolumn dilution sample flow buffer-free solvents implementing counter gradient reduced buildup in ion source resulted excellent repeatability. With this method, over 5,500 unique molecular formulas were detected from just 5.5 nmol 100 μL filtered Arctic Ocean seawater. observed highly linear detector response variable concentrations high robustness against matrix. Compared extracted DOM, our injection method demonstrated superior sensitivity heteroatom-containing DOM. The analysis seawater offers fast simple preparation avoids fractionation introduced by facilitates studies environments, where only minimal volume available e.g. sediment pore water, ice cores, or permafrost soil solution. small requirement also supports higher spatial (e.g., soils) temporal culture experiments). Chromatographic adds further information formulas, enhancing understanding biogeochemistry, chemodiversity, ecological processes.
Язык: Английский
Процитировано
19
Water Research, Год журнала: 2024, Номер 255, С. 121429 - 121429
Опубликована: Март 5, 2024
Язык: Английский
Процитировано
16
Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 342, С. 123408 - 123408
Опубликована: Окт. 21, 2023
Язык: Английский
Процитировано
18
Environmental Science and Ecotechnology, Год журнала: 2024, Номер 21, С. 100392 - 100392
Опубликована: Янв. 27, 2024
Activated carbon is employed for the adsorption of organic micropollutants (OMPs) from water, typically present in concentrations ranging ng L−1 to μg L−1. However, efficacy OMP removal considerably deteriorated due competitive background dissolved matter (DOM), at substantially higher mg Interpreting characteristics DOM crucial predicting efficiencies across diverse natural waters. Molecular weight (MW), aromaticity, and polarity influence competitiveness. Although aromaticity-related metrics, such as UV254, low MW were proposed correlate with competitiveness, method suffers limitations understanding interplay aromaticity determining Here, we elucidate intricate competition, spanning a fraction level compound level, by employing direct sample injection liquid chromatography coupled ultrahigh-resolution Fourier-transform ion cyclotron resonance mass spectrometry. Anion exchange resin pre-treatment eliminated 93 % UV254-active DOM, predominantly aromatic polar only minimally alleviated competition. characterization revealed that nonpolar molecular formulas (constituting 26 PAC-adsorbable DOM) medium contributed more Isomer-level analysis indicated competitiveness highly LMW compounds was strongly counterbalanced increased polarity. Strong aromaticity-derived π-π interaction cannot facilitate hydrophilic compounds. Our results underscore constraints depending solely on aromaticity-based approaches exclusive interpretive measure In broader context, this study demonstrates an effect-oriented analysis, elucidating counterbalancing interactions properties level.
Язык: Английский
Процитировано
6
Journal of Geophysical Research Oceans, Год журнала: 2024, Номер 129(2)
Опубликована: Фев. 1, 2024
Abstract Dissolved organic sulfur (DOS) is an important component of dissolved matter (DOM) and widely exists at the land‐atmosphere interface. However, characterization DOS molecular level among different environmental samples in coastal regions has not been sufficiently focused. Here, we investigated aerosol, rainwater, river water Shanghai using improved method–online liquid chromatography coupled to Fourier transform ion cyclotron resonance mass spectrometry (LC‐FT‐ICR MS). This system utilized separate from complicated matrices. The results showed that average relative abundance three media (aerosol, samples) accounted for 16.8%, 21.9% 13.1%, respectively. common molecules mediums contain aromatic aliphatic anthropogenic origin addition natural sources sea spray. Notably, a new structural classification scheme demonstrate sulfonates their derivatives are spread, although diversity medium was recorded due complex conditions diverse sources.
Язык: Английский
Процитировано
6
Environmental Science & Technology, Год журнала: 2024, Номер 58(13), С. 5899 - 5910
Опубликована: Март 19, 2024
The established benefits of ozone on microbial pathogen inactivation, natural organic matter degradation, and inorganic/organic contaminant oxidation have favored its application in drinking water treatment. However, viable bacteria are still present after the ozonation raw water, bringing a potential risk to membrane filtration systems terms biofilm accumulation fouling. In this study, we shed light role specific dose (0.5 mg-O3/mg-C) during long-term ultrafiltration. Results demonstrated that transformed molecular structure influent dissolved (DOM), producing fractions were highly bioavailable at 0.5, which was inferred be turning point. With increase dose, consortium substantially shifted, demonstrating decrease richness diversity. Unexpectedly, opportunistic Legionella stimulated occurred approximately 40% relative abundance higher 1. Accordingly, system with 0.5 presented lower thickness, weaker fluorescence intensity, smaller concentrations polysaccharides proteins, Raman activity, leading hydraulic resistance, compared Our findings highlight interaction mechanism between molecular-level DOM composition, consortium, performance, provides an in-depth understanding impact accumulation.
Язык: Английский
Процитировано
6
The Analyst, Год журнала: 2024, Номер 149(12), С. 3468 - 3478
Опубликована: Янв. 1, 2024
We show how ultrahigh resolution mass spectrometry hyphenated with liquid chromatography and a post-column infused internal standard can be used for semi-quantitative analysis of dissolved organic matter injected at native concentrations.
Язык: Английский
Процитировано
6
Water Research, Год журнала: 2022, Номер 232, С. 119484 - 119484
Опубликована: Дек. 12, 2022
Ozonation of drinking water and wastewater is accompanied by the formation disinfection byproducts (DBPs) such as low molecular weight aldehydes ketones from reactions ozone with dissolved organic matter (DOM). By applying a recently developed non-target workflow, 178 carbonous nitrogenous carbonyl compounds were detected during bench-scale ozonation two lake waters three secondary effluent samples full-scale treated effluent. An overlapping subset (20%) was in all types. Moreover, effluents showed significantly higher fraction N-containing (30%) compared to (17%). All can be classified 5 main trends function increasing specific doses. Formation upon comparison results presence absence •OH radical scavenger DMSO combination kinetic mechanistic information allowed elucidate potential structures. A link between their precursors established ozonating six model (phenol, 4-ethylphenol, 4-methoxyphenol, sorbic acid, 3-buten-2-ol acetylacetone). About one third real also compounds. Evaluation analysis data revealed identity 15 compounds, including hydroxylated (e.g. hydroxyacetone, confidence level (CL) = 1), unsaturated dicarbonyls acrolein, CL 1; 2-butene-1,4-dial, 4-oxobut-2-enoic 2) nitrogen-containing compound (2-oxo-propanamide, =1). Overall, this study shows versatile involving reactions. Carbonyl unknown toxicity might formed, it could demonstrated that malondialdehyde, methyl glyoxal, 2-butene-1,4-dial 4-oxo-pentenal are degraded biological post-treatment.
Язык: Английский
Процитировано
28
Water Research, Год журнала: 2022, Номер 222, С. 118933 - 118933
Опубликована: Авг. 1, 2022
Organic matter (OM) is the most important factor influencing effectivity and efficiency of micropollutant (MP) ozonation in wastewater effluents. The importance quantity OM known, because this, total organic carbon (TOC) generally used to determine required ozone dose for any water sample. Still, effect type on MP not well understood. In this study, effluents from five treatment plants were collected these was fractionated using membranes (F1-4) resin (HI, HOA, HON HOB). Fractions diluted same TOC concentration, spiked with MPs ozonated at three doses. Our results show that all had comparable compositions similar removal, confirming suitability compare requirements From 19 analysed MPs, groups identified showed removal behaviour. strongest differences between observed around reactivities 102, 104 106 M−1 s−1. This indicates presence samples interfere different MPs. fraction higher high medium reactivity, indicating a low interference ozonation. fractions HOA HI Therefore, removing prior would result lower more efficient correlated characteristics A300, SR fluorescence component comp 2. These can be as inline tools predict plants.
Язык: Английский
Процитировано
26