Talanta, Journal Year: 2022, Volume and Issue: 248, P. 123623 - 123623
Published: May 31, 2022
Language: Английский
Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(6), P. 2672 - 2681
Published: Feb. 1, 2023
Dissolved Organic Matter (DOM) is an important component of the global carbon cycle. Unscrambling structural footprint DOM key to understand its biogeochemical transformations at mechanistic level. Although numerous studies have improved our knowledge chemical makeup, three-dimensional picture remains largely unrevealed. In this work, we compare four solid phase extracted (SPE) samples from three different freshwater ecosystems using high resolution mobility and ultrahigh-resolution Fourier transform ion cyclotron resonance tandem mass spectrometry (FT-ICR MS/MS). Structural families were identified based on neutral losses level nominal continuous accumulation selected ions-collision induced dissociation (CASI-CID)FT-ICR MS/MS. Comparison indicated dissimilarities in sample set. The family representation Cytoscape software revealed characteristic clustering patterns among samples, thus confirming clear differences (Only 10% common across samples.). analysis loss-based functionalities suggests that hydration carboxylation are ubiquitous transformational processes ecosystems. contrast, transformation mechanisms involving methoxy moieties may be constrained estuarine systems due extensive upstream lignin biodegradation. inclusion isomeric content (mobility measurements formula) description additional pathways and/or source variations possible account for observed. While character more diverse types needs assessed added database, results presented here demonstrate Graph-DOM a powerful tool capable providing novel information footprint, interconnections precursor molecules generated by fragmentation collisional cross sections.
Language: Английский
Citations
19
Water Research, Journal Year: 2023, Volume and Issue: 246, P. 120694 - 120694
Published: Oct. 4, 2023
Language: Английский
Citations
16
Environmental Science Processes & Impacts, Journal Year: 2021, Volume and Issue: 23(10), P. 1466 - 1475
Published: Jan. 1, 2021
Dissolved organic matter (DOM) in petroleum refinery wastewater is an extremely complex mixture. A better understanding of chemical compositions DOM at the molecular level necessary for design and optimization treatment processes. In this study, two largely different samples, one from a other Suwannee river water, were characterized by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) coupled with positive-/negative-ion electrospray ionization (ESI), positive-ion atmospheric pressure photoionization (APPI). For DOM, total 6226 formulae assigned three modes. However, only 1182 common all spectra, indicating that techniques highly complementary types molecules they ionize. Acid Ox (x = 1-9) basic N1Ox 0-2) classes dominant detected negative-ion ESI mode, respectively. And contains considerable amounts polycyclic aromatic hydrocarbons did not respond to but can be ionized selectively APPI. Compared riverine has higher complexity more enriched hydrocarbon, nitrogen- sulfur-containing compounds. The results show major components distinctive those natural matter. Though quantitative, obtained various found complementary, are helpful our selectivity as well DOM.
Language: Английский
Citations
29
Fundamental Research, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Dissolved organic matter (DOM) is ubiquitous and contains a complex pool of thousands distinct molecules, their chemical characteristics help us inform the fate global carbon. However, more holistic perspective molecular DOM underlying mechanisms across Earth systems climates remains understudied. Here, we present comprehensive analysis using two abundance-weighted average indices, i.e., H/C O/C ratios by compiling 2,995 samples from 317 studies covering waters, land, plant, petroleum, atmosphere climatic regions tropics to tundra. are lower on in waters (H/C = 1.15 ± 0.005) land 1.20 0.010) than other systems, while rank between plant systems. In vary highest lowest habitats land-to-ocean continuum generally as snow > glacier marine ≥ freshwater/soil groundwater. The show predictably U-shaped patterns along latitudinal gradients, indicating abundance hydrogen-saturated molecules at mid-latitudes approximately 40°-50° river water, lake forest soil. primarily controlled environmental factors such pH, dissolved oxygen, carbon nitrogen contents. We further unveil additional considerable links extremes precipitation warmest quarter maximum temperature month. Our synthesis provides molecular-level perspectives characterize distribution drivers DOM, which complementary for our understanding cycle processes under future change.
Language: Английский
Citations
4
Energy & Fuels, Journal Year: 2021, Volume and Issue: 35(22), P. 18056 - 18077
Published: Aug. 19, 2021
Petroporphyrins, geoporphyrins, or metalloporphyrins are the original petroleum biomarkers, identified by Alfred Treibs more than a century ago and first molecular evidence for biogenic origins of petroleum. Since discovery, analytical strategies have been developed to identify porphyrins in its fractions. This review focuses on advances enabled ultrahigh resolving power Fourier transform ion cyclotron resonance mass spectrometry tribute Professor Alan G. Marshall.
Language: Английский
Citations
27
Journal of Geophysical Research Biogeosciences, Journal Year: 2022, Volume and Issue: 127(5)
Published: May 1, 2022
Abstract Freeze‐thaw is a disturbance process in cold regions where permafrost soils are becoming vulnerable to temperature fluctuations above 0°C. alters soil physical and biogeochemical properties with implications for carbon persistence emissions Arctic landscapes. We examined whether different freeze‐thaw histories two systems led contrasting responses under laboratory‐controlled incubation. investigated controls on composition through Fourier‐transform ion cyclotron resonance mass spectrometry (FT‐ICR‐MS) identify nominal oxidation states relative abundances of aliphatic‐type molecules both surface subsurface soils. Soil cores (∼60 cm‐depth) were sampled from sites Alaskan landscapes situ characteristics: Healy (>40 cycles annually) Toolik (<15 annually). FT‐ICR‐MS was coupled data (i.e., texture, mineralogy) assess (a) differences organic matter associated previous history (b) sensitivity experimental the extracted cores. Control (freeze‐only) samples showed greater compared Toolik, even lower mineral horizons comparable across sites. most loss compounds following depths, including decrease aliphatics. responded more slowly as shown by intermediary distributed multiple compound classes. Variations response chemistry an important factor predicting changes function thaws high northern latitudes.
Language: Английский
Citations
19
Carbon, Journal Year: 2022, Volume and Issue: 203, P. 377 - 385
Published: Nov. 29, 2022
Language: Английский
Citations
19
Soil & Environmental Health, Journal Year: 2025, Volume and Issue: unknown, P. 100148 - 100148
Published: March 1, 2025
Language: Английский
Citations
0
ACS ES&T Water, Journal Year: 2025, Volume and Issue: 5(5), P. 2233 - 2243
Published: April 29, 2025
Drinking water is becoming more difficult to treat, especially in the UK, due changing concentration and composition of aquatic dissolved organic matter (DOM). The spatial temporal variations DOM are not well understood. This study investigated how varies along a north/south gradient over four years, between headwaters reservoirs. There were trends metrics from north south; carbohydrate peptide-like compounds lower northern sites, while lipid-like further south, suggesting different sources catchments. collected Autumn 2021, after Summer low rainfall, was aromatic, less oxidized, diverse than 2018-2020. Decreased lipid content increased oxy-aromatic occurred Autumn, at end plant growing season, when rainfall rewets catchments mobilizes soil OM into surface waters. These seasonal changes coincide with concentrations raw drinking water, leading challenges for treatment, as climate change alters distribution UK.
Language: Английский
Citations
0
Water Research, Journal Year: 2022, Volume and Issue: 229, P. 119477 - 119477
Published: Dec. 8, 2022
Despite effluent organic matter (EfOM) being a major consumer of ozone during wastewater treatment, little is known about ozonation byproducts (OBPs) produced from EfOM. To unambiguously identify OBPs, heavy was used to ozonate EfOM, resulting in 18O labeled and unlabeled OBPs. Labeled OBPs mostly represent single transfer were classified as either direct or indirect based on the 18O/16O intensity ratios isotopologues. Of 929 84 unequivocally The remainder suggest contribution by indirect, hydroxyl radical induced formation Overall, labelled possess low degree unsaturation contributed most OBP peak - marking them potential end products. A few with high containing heteroatoms (N, S) fragmented CID FT-ICR-MS/MS screened for indicative neutral losses carrying oxygen. loss screening detect location indicate original functional group EfOM reaction mechanisms. We identified sulfoxide sulfonic acid groups selected implying presence reduced sulfur molecules while no evidence nitrogen reacting found.
Language: Английский
Citations
15