Large-scale study on groundwater dissolved organic matter reveals a strong heterogeneity and a complex microbial footprint DOI Creative Commons
Astrid Harjung, Johannes Schweichhart,

Grit Rasch

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 854, P. 158542 - 158542

Published: Sept. 8, 2022

Dissolved organic matter (DOM) in terrestrial groundwater is generally low concentration compared to inland surface waters. However, the overall amount of DOM huge, as there 100 times more fresh than water. To date, research on has merely focused specific threats humans such e.g. and heavy metal complexations from hydrocarbon contamination. A comprehensive, large-scale study still missing. Here, we examine properties a approach with regards characteristics land use altitude, aquifer well microbial features. We analyzed 1600 water samples bodies all over Austria their quantity, quality bacterial abundance (BA). was evaluated self-organizing maps fluorescence excitation-emission-matrices (EEMs) combined Ward clustering subsequent parallel factor analysis describe each cluster. how these clusters differed among other, based DOC nitrate concentrations, BA selected environmental characteristics. Our results show that components resemble found other studies, studies forest streams, dark ocean, agricultural catchments wastewater treatment plants. The latter were associated cluster characterized by urban use, high concentrations. Clusters an increased high-molecular weight humic components, commonly vascular plant soil origin, correlated higher abundance. This observation provides evidence elevated numbers suspended bacteria mainly originate surface. shows can be fast monitoring tool identify aquifers under anthropogenic stress delineate sensitive recharge areas surface-groundwater interaction.

Language: Английский

Thermal responses of dissolved organic matter under global change DOI Creative Commons
Ang Hu, Kyoung‐Soon Jang, Andrew J. Tanentzap

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 17, 2024

The diversity of intrinsic traits different organic matter molecules makes it challenging to predict how they, and therefore the global carbon cycle, will respond climate change. Here we develop an indicator compositional-level environmental response for dissolved quantify aggregated individual that positively negatively associate with warming. We apply assess thermal sediment in 480 aquatic microcosms along nutrient gradients on three Eurasian mountainsides. Organic consistently temperature change within across contrasting zones. At a compositional level, warmer sites has stronger shows functional reorganization towards lower thermodynamic favorability microbial decomposition. is more sensitive warming at higher nutrients, increased sensitivity up 22% each additional 1 mg L

Language: Английский

Citations

18
Marine Recalcitrant Dissolved Organic Matter Gained by Processing at Sandy Subterranean Estuaries DOI
Peng Zhang, Yinghui Wang, Biwei Yang

et al.

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

Published: Feb. 13, 2025

The sandy subterranean estuary (STE) connecting fresh groundwater to saline sea water is characterized by strong geochemical (salinity, redox, and pH) gradients, with evidence emerging for its role as a hot spot consumption of labile substrates. This inspired us conduct study evaluate whether this holds true dissolved organic matter (DOM), especially given the still mysterious origin marine recalcitrant DOM. Here, characterization DOM 21 samples (depth 1-13 m, salinity 3.9‰ 32.4‰) across 65 m transect an STE located in coastal Guangdong, China, has found systematic biotransformation toward "recalcitrant" carboxyl-rich alicyclic molecules (CRAM). fraction CRAM (%CRAM) increases from 33.1% 76.7% increasing degree degradation salinity. Further, processing DOM, including more "biolabile" lower %CRAM released aquitard, active under oxic conditions than reducing conditions. Given large quantities that recirculates through STEs globally, amount (RDOM) entering ocean after likely be considerable. While studies are needed, can gain CRAM-like compounds way.

Language: Английский

Citations

2
Novel insights into the DOM-driven processes affecting nitrogen cycling in shallow aquifers of the West Liao River Plain: Evidence from FT-ICR MS and isotope analyses DOI

Jiaqi Jiang,

Chunli Su, Hongyan Geng

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 132969 - 132969

Published: Feb. 1, 2025

Language: Английский

Citations

2
Transformation of dissolved organic matter in landfill leachate during a membrane bioreactor treatment DOI
Zhepei Gu,

Min Bao,

Chen He

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 856, P. 159066 - 159066

Published: Sept. 26, 2022

Language: Английский

Citations

41
Complementary Elucidation of the Molecular Characteristics of Groundwater Dissolved Organic Matter Using Ultrahigh-Resolution Mass Spectrometry Coupled with Negative- and Positive-Ion Electrospray Ionization DOI
Ziqi Zhou, Qing‐Long Fu, Manabu Fujii

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(11), P. 4690 - 4700

Published: March 11, 2023

The formula assignment of the Fourier transform ion cyclotron resonance mass spectrometry coupled with positive-ion electrospray ionization [ESI(+)-FT-ICR MS] is challenging because extensive occurrence adducts. However, there a paucity automated methods for ESI(+)-FT-ICR MS spectra. novel algorithm spectra developed herein has been applied to elucidate composition dissolved organic matter (DOM) in groundwater during air-induced ferrous [Fe(II)] oxidation. DOM were profoundly impacted by [M + Na]+ adducts and, lesser extent, K]+ Oxygen-poor and N-containing compounds frequently detected when FT-ICR was operated ESI(+) mode, while components higher carbon oxidation states preferentially ionized negative-ion [ESI(−)] mode. Values difference between double-bond equivalents number oxygen atoms from −13 13 are proposed aquatic DOM. Furthermore, first time, Fe(II)-mediated formation highly toxic iodine species reported rich Fe(II), iodide, results this study not only shed light on further development comprehensive characterization ESI(−)-FT-ICR but also highlight importance appropriate treatment specific prior use.

Language: Английский

Citations

33
Microplastics Reshape the Fate of Aqueous Carbon by Inducing Dynamic Changes in Biodiversity and Chemodiversity DOI
X. Liu, Shuting Wang, Mu Li

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(28), P. 10415 - 10425

Published: July 1, 2023

The interactions among dissolved organic matter (DOM), microplastics (MPs) and microbes influence the fate of aqueous carbon greenhouse gas emissions. However, related processes mechanisms remain unclear. Here, we found that MPs determined by influencing biodiversity chemodiversity. release chemical additives such as diethylhexyl phthalate (DEHP) bisphenol A (BPA) into phase. microbial community, especially autotrophic bacteria Cyanobacteria, showed a negative correlation with released from MPs. inhibition autotrophs promoted CO2 Meanwhile, stimulated metabolic pathways tricarboxylic acid (TCA) cycle to accelerate DOM biodegradation process, then transformed presented low bioavailability, high stability, aromaticity. Our findings highlight an urgent need for chemodiversity surveys assess ecological risks MP pollution impact on cycle.

Language: Английский

Citations

30
New insights into the mechanism of phosphate release during particulate organic matter photodegradation based on optical and molecular signatures DOI

Minli Guo,

Xiaolu Li, Yi Wang

et al.

Water Research, Journal Year: 2023, Volume and Issue: 236, P. 119954 - 119954

Published: April 8, 2023

Language: Английский

Citations

29
Molecular composition of dissolved organic matter across diverse ecosystems: Preliminary implications for biogeochemical cycling DOI
Chen He, Yuanbi Yi, Ding He

et al.

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 344, P. 118559 - 118559

Published: July 5, 2023

Language: Английский

Citations

27
Will various interpretation strategies of the same ultrahigh‐resolution mass spectrometry data tell different biogeochemical stories? A first assessment based on natural aquatic dissolved organic matter DOI
Yuanbi Yi, Chen He,

Katrin Klaproth

et al.

Limnology and Oceanography Methods, Journal Year: 2023, Volume and Issue: 21(6), P. 320 - 333

Published: May 10, 2023

Abstract Fourier ion cyclotron resonance mass spectrometry (FT‐ICR MS), one of the state‐of‐the‐art ultrahigh‐resolution techniques, is widely used in dissolved organic matter (DOM) research. As research that focuses on identifying DOM molecular fingerprints increases tremendously, there and will be an urgent need to compare among studies. Different groups usually use various types data processing interpretation strategies. It critical explore if different strategies impact comparability FT‐ICR MS results their biogeochemical interpretations. To address this question, we selected samples along a freshwater‐to‐marine continuum measured by negative‐ion mode electrospray ionization MS. We interpreted raw using strategies, compared evaluated strategy‐induced effects Our show total 3827 formulas account for 91.6% ± 4.1% (on average) intensity are assigned all while 6521 8.4% not commonly three conclude (i) do significantly affect geochemical stories relied composition, (ii) comparison based gives more reliable than formular number alone. Moreover, also provide (by our strategies) community interpretation. aim call attention improving facilitating integration composition global

Language: Английский

Citations

25
Dissolved Organic Matter Sources in High Arsenic Groundwater From a Sand‐Gravel Confined Aquifer DOI
Zhipeng Gao, Huaming Guo,

Wen Qiao

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2023, Volume and Issue: 128(2)

Published: Feb. 1, 2023

Abstract Sources of dissolved organic matter (DOM) triggering arsenic enrichment in deep confined groundwater is a highly debated issue. Along these lines, the spectroscopic and molecular characteristics DOM were monitored both shallow unconfined from Songnen Basin, China. Results demonstrated that with higher concentrations was characterized by more abundant labile compounds than groundwater. The three‐end‐member mixing model estimated had fraction surface water, while primarily recharged lateral flow. Groundwater sources fluorescence index (FI) values, which suggests sourced water stronger terrestrial signatures. However, mainly situ sedimentary release or by‐products microbial activity Higher values degradation (I_deg) indicate undergone greater extents one. anoxic environments occurred via pathway where saturated low‐molecular‐mass preferentially degraded to produce mid‐molecular‐mass unsaturated, aromatic, This explained significant positive correlations between FI I_deg values. A state conducive work successfully identified distinct DOM, proposed paradigm processing pathways during under environments.

Language: Английский

Citations

24