Response of dissolved organic matter (DOM) and microbial community to submerged macrophytes restoration in lakes: A review

Environmental Research, Год журнала: 2023, Номер 231, С. 116185 - 116185

Опубликована: Май 17, 2023

Язык: Английский

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Advances in the characterization and monitoring of natural organic matter using spectroscopic approaches

Water Research, Год журнала: 2020, Номер 190, С. 116759 - 116759

Опубликована: Дек. 17, 2020

Язык: Английский

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The impacts of reservoirs on the sources and transport of riverine organic carbon in the karst area: A multi-tracer study

Water Research, Год журнала: 2021, Номер 194, С. 116933 - 116933

Опубликована: Фев. 15, 2021

Язык: Английский

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Changes in groundwater dissolved organic matter character in a coastal sand aquifer due to rainfall recharge

Water Research, Год журнала: 2019, Номер 169, С. 115201 - 115201

Опубликована: Окт. 18, 2019

Dissolved organic matter (DOM) in groundwater is fundamentally important with respect to biogeochemical reactions, global carbon cycling, heavy metal transport, water treatability and potability. One source of DOM from the transport vadose zone by rainfall recharge. Changes precipitation patterns associated natural climate variability change are expected alter load character released these areas, which ultimately impacts on quality treatability. In order investigate potential changes after recharge, we sampled shallow a coastal peat-rich sand aquifer New South Wales, Australia, during an extended period low (average daily rate < 1.6 mm day−1 over 8 months prior sampling), two events (84 98 respectively). We assess composition correcting for dilution novel combination advanced analytical techniques: liquid chromatography detection (LC-OCD) negative-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). also chemistry pre- post-rainfall. Post-rainfall, show that dilution-corrected amount highly aromatic molecular formulae (i.e. those categorised into groups polyphenolics condensed aromatics) were 1.7 2.0 times higher respectively than pre-rainfall samples. attribute this flushing peat-derived buried material groundwater. identify periods can lead hydrophilic/HOC ratios (median = 4.9, n 14). Redundancy analysis (RDA) was used compare HOC fraction FT-ICR MS compound groups. has more samples, less similar post-rainfall This suggests decline water-borne hydrophobics observed could be preferential adsorption hydrophobic DOM, making samples treatable potable supply. Post-rainfall observe significant increases arsenic (leading concentrations greater 3 World Health Organisation drinking limit 10 μg / L). Increases due may therefore peatland areas ways impact bioavailability, increase concentrations, reducing ease treatment human consumption. To best our knowledge, first study chemical sedimentary rich environment through multiple techniques.

Язык: Английский

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Photochemical Behavior of Microbial Extracellular Polymeric Substances in the Aquatic Environment

Environmental Science & Technology, Год журнала: 2021, Номер 55(22), С. 15090 - 15099

Опубликована: Сен. 15, 2021

Microbially derived extracellular polymeric substances (EPSs) occupy a large portion of dissolved organic matter (DOM) in surface waters, but the understanding photochemical behaviors EPS is still very limited. In this study, characteristics from different microbial sources (Shewanella oneidensis, Escherichia coli, and sewage sludge flocs) were investigated terms production reactive species (RS), such as triplet intermediates (3EPS*), hydroxyl radicals (•OH), singlet oxygen (1O2). The steady-state concentrations •OH, 3EPS*, 1O2 varied ranges 2.55–8.73 × 10–17, 3.01–4.56 10–15, 2.08–2.66 10–13 M, respectively, which within range reported for DOM other sources. RS among isolates due to diversity their composition. A strong degradation protein-like components was identified by excitation emission matrix fluorescence with parallel factor analysis, relatively, humic-like remained stable. Fourier-transform ion cyclotron resonance mass spectrometry further revealed that aliphatic resistant irradiation, while portions lower H/C ratios higher O/C more susceptible photolysis, leading phototransformation saturation aromaticity. With EPS, could effectively promote antibiotic tetracycline. findings study provide new insights into photoinduced self-evolution interrelated fate contaminants aquatic environment.

Язык: Английский

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Characterization and biogeochemical implications of dissolved organic matter in aquatic environments

Journal of Environmental Management, Год журнала: 2021, Номер 294, С. 113041 - 113041

Опубликована: Июнь 11, 2021

Язык: Английский

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Relative contributions of different sources to DOM in Erhai Lake as revealed by PLS-PM

Chemosphere, Год журнала: 2022, Номер 299, С. 134377 - 134377

Опубликована: Март 29, 2022

Язык: Английский

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Interactions between white and black carbon in water: A case study of concurrent aging of microplastics and biochar

Water Research, Год журнала: 2023, Номер 238, С. 120006 - 120006

Опубликована: Апрель 26, 2023

Язык: Английский

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Burial or mineralization: Origins and fates of organic matter in the water–suspended particulate matter–sediment of macrophyte- and algae-dominated areas in Lake Taihu

Water Research, Год журнала: 2023, Номер 243, С. 120414 - 120414

Опубликована: Июль 25, 2023

Язык: Английский

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Towards (better) fluvial meta-ecosystem ecology: a research perspective

npj Biodiversity, Год журнала: 2024, Номер 3(1)

Опубликована: Фев. 7, 2024

Rivers are an important component of the global carbon cycle and contribute to atmospheric exchange disproportionately their total surface area. Largely, this is because rivers efficiently mobilize, transport metabolize terrigenous organic matter (OM). Notably, our knowledge about magnitude globally relevant fluxes strongly contrasts with lack understanding underlying processes that transform OM. Ultimately, OM processing en route oceans results from a diverse assemblage consumers interacting equally pool resources in spatially complex network heterogeneous riverine habitats. To understand interaction between OM, we must therefore account for spatial configuration, connectivity, landscape context at scales ranging local ecosystems entire networks. Building such explicit framework fluvial across may also help us better predict poorly understood anthropogenic impacts on cycling, instance human-induced fragmentation changes flow regimes, including intermittence. Moreover, current unprecedented human-driven loss biodiversity. This least partly due mechanisms operating scales, as interference migration habitat homogenization, comes largely unknown functional consequences. We advocate here comprehensive networks connecting two aware but disparate lines research (i) metacommunities biodiversity, (ii) biogeochemistry contribution cycle. argue agenda focusing regional scale-that is, river network-to enable deeper mechanistic naturally arising biodiversity-ecosystem functioning coupling major driver biogeochemically fluxes.

Язык: Английский

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