Photofate of Tetrabromobisphenol-A in the Arctic: Role of photofluence and dissolved organic matter DOI Creative Commons
Robyn C. O’Halloran, Jill F. Kerrigan, Lauren E. O’Connor

et al.

Arctic Antarctic and Alpine Research, Journal Year: 2024, Volume and Issue: 56(1)

Published: Aug. 9, 2024

Polybrominated diphenyl ethers (PBDEs) used in consumer goods and flame retardants have been replaced by alternatives such as tetrabromobisphenol A (TBBPA). TBBPA does not readily undergo global distal transport, but local sources still threaten aquatic ecosystems. We studied the photofate of with a specific focus on how Arctic-derived dissolved organic matter (DOM) affects its reaction kinetics, degradation pathways formation photoproducts artificial natural sunlight. Our results corroborate earlier studies that reveal pH-dependent trend TBBPA's direct photolysis longer times for acidic form. DOM either plays no role or it slightly reduces rate photodegradation via inner-filter effects. Photolysis experiments conducted at our Arctic field site, Toolik Lake Field Station, revealed slower than anticipated degradation, which magnified half-life significantly during in-lake experiments. Importantly, composition was found to influence type distribution formed, suggests different occur presence DOM. These findings provide valuable insights into intricate interplay environmental variables govern fate sunlit ecosystems globally.

Language: Английский

Critical review of fluorescence and absorbance measurements as surrogates for the molecular weight and aromaticity of dissolved organic matter DOI Creative Commons
Julie A. Korak, Garrett McKay

Environmental Science Processes & Impacts, Journal Year: 2024, Volume and Issue: 26(10), P. 1663 - 1702

Published: Jan. 1, 2024

Dissolved organic matter (DOM) is ubiquitous in aquatic environments and challenging to characterize due its heterogeneity. Optical measurements (

Language: Английский

Citations

9
Humic Substances: Bridging Ecology and Agriculture for a Greener Future DOI Creative Commons
Angela Maffia, Mariateresa Oliva, Federica Marra

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(2), P. 410 - 410

Published: Feb. 6, 2025

Humic substances (HSs) are emerging as multifunctional natural catalysts in sustainable agriculture, offering novel opportunities to enhance soil health, plant productivity, and environmental resilience. This review synthesizes recent insights into the chemical diversity, biological mechanisms, ecological impacts of HSs, presenting a new perspective on their role dynamic agents agroecosystems. Derived from decomposed organic matter, HSs regulate critical processes such nutrient cycling, carbon sequestration, pollutant detoxification. Unlike microbial biomass, which undergo rapid mineralization due active dynamism, exhibit significant resistance biodegradation, leading prolonged residence time that spans years or even centuries. stability allows maintain functional roles over extended periods, contributing long-term health ecosystem sustainability. Their integration agricultural systems has demonstrated profound effects, including improved structure, increased water retention, stimulation activity, collectively bolster stress tolerance yield. Notably, it been proposed hormone-like properties, influencing signaling pathways root architecture acquisition. Moreover, contribute remediation by regulating leaching heavy metals, mitigating runoff, fostering climate highlights synergistic potential combining with amendments like compost biochar, positioning cornerstone regenerative farming practices. Addressing challenges variability composition application methods, discussion underscores urgency developing standardized approaches harness full potential. By framing versatile adaptive tools, this paves way for advancing while addressing global food security change.

Language: Английский

Citations

1
Synthesis and Evaluation of a Novel Cross-Linked Biochar/Ferric Chloride Hybrid Material for Integrated Coagulation and Adsorption of Turbidity and Humic Acid from Synthetic Wastewater: Implications for Sludge Valorisation DOI
Pamphile Ndagijimana, Hongwei Rong, Luchun Duan

et al.

Environmental Research, Journal Year: 2024, Volume and Issue: 255, P. 119134 - 119134

Published: May 13, 2024

Language: Английский

Citations

4
Characterization of a Newly Available Coastal Marine Dissolved Organic Matter Reference Material (TRM-0522) DOI Creative Commons
Stacey L. Felgate, Alexander J. Craig, Lindon W. K. Moodie

et al.

Analytical Chemistry, Journal Year: 2023, Volume and Issue: 95(16), P. 6559 - 6567

Published: April 13, 2023

Recent methodological advances have greatly increased our ability to characterize aquatic dissolved organic matter (DOM) using high-resolution instrumentation, including nuclear magnetic resonance (NMR) and mass spectrometry (HRMS). Reliable DOM reference materials are required for further method development data set alignment but do not currently exist the marine environment. This presents a major limitation biogeochemistry related fields, natural product discovery. To fill this resource gap, we prepared coastal material (TRM-0522) from 45 m deep seawater obtained ∼1 km offshore of Sweden's west coast. Over 3000 molecular formulas were assigned by direct infusion HRMS, confirming sample diversity, distribution in van Krevelen space was typical sample, with majority region H/C 1–1.5 O/C 0.3–0.7. The extracted pool more nitrogen (N)- sulfur (S)-rich than terrestrial (SRFA). MZmine3 processing ultrahigh-performance liquid chromatography (UPLC)-HRMS/MS revealed 494 resolvable features (233 negative mode; 261 positive mode) over wide range retention times masses. NMR indicated low contributions aromatic protons and, generally speaking, lignin, humic, fulvic substances associated samples. Instead, carboxylic-rich aliphatic molecules most abundant components, followed carbohydrates functionalities. is consistent very specific UV absorbance SUVA254 value 1.52 L mg C–1 m–1. When combined comparisons existing (Suwannee River acid Pony Lake acid), these results suggest that TRM-0522 useful otherwise unavailable use biogeochemistry.

Language: Английский

Citations

10
Advancing chemical lability assessments of organic matter using a synthesis of FT-ICR MS data across diverse environments and experiments DOI Creative Commons
Juliana D’Andrilli, Carlos M. Romero, Phoebe Zito

et al.

Organic Geochemistry, Journal Year: 2023, Volume and Issue: 184, P. 104667 - 104667

Published: Aug. 23, 2023

Patterns in Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) data provide perspective on how organic matter (OM) character is shaped by natural processes. Here, we reevaluate and update the molecular lability boundary (MLB) approach to assess OM using a synthesis of FT-ICR MS data. Now included are MLBL (biolability) indices (i.e., proportion hydrogen-to-carbon ratios ≥ 1.5) freshwaters, plant litter biochar leachates, soils, oils across US, trends dissolved (DOM) from laboratory experiments examining isolated microbial, photochemical, thermal degradation, biogeochemical interpretations biolability patterns ecosystems influenced human activity (e.g., fertilizer addition agricultural management). Photo-processing increased hydrogen saturation OM, describing products higher (> values). DOM values decreased during microbial degradation Laboratory with treatments showed larger changes than exhibited field samples systems managed humans. We interpret N- and/or S-containing above MLB as production or use heterogeneously biolabile material. interpreted labile composition indicate autochthonous production, biomass growth, nutrient accumulation, biological stream soil samples. The most recent our suggest that should be reframed for biotic, thermal, photochemical A broader provides useful tool decompose large, complex, process-driven into more simple informative indicators ecosystem form function.

Language: Английский

Citations

10
Recent Developments on the Three-Dimensional Structure of Dissolved Organic Matter: Toward a Unified Description DOI
Kari E. Norris, Joseph J. Pignatello, Elena A. Vialykh

et al.

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

Published: Feb. 10, 2025

Advancing a common understanding about the chemical composition, size, and three-dimensional (3D) structure of dissolved organic matter (DOM) is paramount to deciphering its impact on involvement in environmental processes, such as fate transport contaminants carbon cycling. Traditionally, DOM has been described collection solvent-separated molecules or macromolecules. More recently, depicted "supramolecular assembly", individual associations held together by non-covalent interactions. The supramolecular assembly model broadly invoked rationalize certain behaviors properties DOM, yet complexity made it difficult fully unravel nature contributions intermolecular Discussed this perspective evidence regarding thermodynamic drivers associations, molecular sorption optical DOM. While single observations may be rationalized former structural models, model, combined shows that 3D best mixed dynamic (MDAM). MDAM depicts small, tightly knit assemblies strong hydrogen bonds, which form large through weak interactions only at specific pH values, high ionic strength, concentration.

Language: Английский

Citations

0
Qualitatively elucidating the molecular characteristics of precursors for saturated halogenated disinfection byproducts in chlorinated urban eutrophic lake water by ultrahigh-resolution mass spectrometry DOI
Shixi Wu, Qing‐Long Fu, Manabu Fujii

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 489, P. 137709 - 137709

Published: Feb. 22, 2025

Language: Английский

Citations

0
Chemical signatures of microbial life in an ecological end-member: Shifting hydroclimate and sediment fluxes influence DOM biogeochemistry in Lake Fryxell, a permanently ice-covered lake in the McMurdo Dry Valleys of Antarctica DOI Creative Commons
Garrett Rue, Diane M. McKnight

Arctic Antarctic and Alpine Research, Journal Year: 2025, Volume and Issue: 57(1)

Published: April 14, 2025

Language: Английский

Citations

0
Chlorpyrifos fate in the Arctic: Importance of analyte structure in interactions with Arctic dissolved organic matter DOI Creative Commons
Lauren E. O’Connor, Pippin Robison,

Ginna Quesada

et al.

Water Research, Journal Year: 2023, Volume and Issue: 242, P. 120154 - 120154

Published: June 3, 2023

Language: Английский

Citations

7
Distributions of humic substances in an estuarine region (Otsuchi Bay, Japan) determined using electrochemical and optical methods DOI
Ying Ping Lee, Kuo Hong Wong, Hajime Obata

et al.

Marine Chemistry, Journal Year: 2023, Volume and Issue: 256, P. 104301 - 104301

Published: Aug. 10, 2023

Language: Английский

Citations

4