Unlocking the Potential of Isopropanol as an Eco-Friendly Eluent for Large-Scale Fractionation of Fulvic Acids via Preparative Reversed-Phase High-Performance Liquid Chromatography and Multidimensional RP-HPLC: Evaluation of Molecular Diversity and Element Composition DOI
Dmitry S. Volkov, Sophia Mikhailovna Byvsheva, Мikhail А. Proskurnin

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(46), P. 20444 - 20456

Published: Nov. 7, 2024

Humic substances are organic mixtures of extreme complexity, which significantly complicate their analysis by any method. Fractionation into more homogeneous seems to be almost the only way overcome these difficulties. Preparative high-performance liquid chromatography (HPLC) provides amounts required for both further fractionation and studies other methods. For first time, isopropyl alcohol (IPA) is proposed purposes; its advantages shown example groundwater fulvic acids (FA). IPA much safer than conventional solvents elutes most nonpolar compounds that nonelutable methanol acetonitrile. The isolated fractions differ in molecular composition, confirmed ultrahigh-resolution mass spectrometry spectroscopy. Stepwise IPA-gradient HPLC-UV each preparative fraction demonstrates possibilities multidimensional HPLC FA. were studied contents a broad range elements, relationships between trace-element compositions revealed. Our data reveals existence numerous different organometal FA composition; thus, approach can used in-depth study mechanisms element migration environment.

Language: Английский

Construction of a Spatial Distribution Relationship Network between Dissolved Organic Matter and Microbial Communities in Chlorobenzene-Polluted Groundwater DOI
Hui Li,

Zhikang Zhou,

Tianyu Xiang

et al.

ACS ES&T Water, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Dissolved organic matter (DOM) is an important geochemical feature connecting pollutants and microorganisms in groundwater. However, the patterns of DOM–microbial community interactions caused by spatial distribution differences remain unclear, necessitating construction a correlation network to elucidate relationships between DOM accurately predict biodegradation process pollutants. This study selected chlorobenzene (CBs)-contaminated bioremediation site analyze fluorescent components molecular structures Microbial metabolic activities were more active areas with high CBs concentration, leading significant microbial source contributions DOM. Intense degradation processes accompanied transformation highly oxidized unsaturated Co-occurrence analysis revealed that communities exhibited density, Pseudomonas playing crucial role The constructed DOM–CBs–microbial relationship showed indices, such as O/C, NOSC, CHO (%), strongly correlated structure could directly indicate CBs. characteristics their links provide rapid accurate method monitor contaminated

Language: Английский

Citations

0
Surface water infiltration and sediment degradation shaping dissolved organic matter in groundwater related to chronic kidney disease of unknown etiology DOI

Xianjiang Zeng,

Wei He,

Qiutong Shi

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: 652, P. 132699 - 132699

Published: Jan. 12, 2025

Language: Английский

Citations

0
Field detection of CODMn with portable optical emission spectrometer coupling with drone-based water sampler DOI
Yuanyuan Liu, Xiaofang Yang, Lin Yao

et al.

Sensors and Actuators B Chemical, Journal Year: 2025, Volume and Issue: 431, P. 137430 - 137430

Published: Feb. 17, 2025

Language: Английский

Citations

0
Impacts of repeated photochemical and microbial processes: selectively shaping of the dissolved organic matter pool DOI
Qi Chen, Christian Lønborg, Jiaxin Chen

et al.

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121159 - 121159

Published: Feb. 1, 2025

Language: Английский

Citations

0
Enclosure restoration regulates epiphytic microbial communities involved in carbon sequestration in a restored urban lake: A new insight from the stability of dissolved organic matter DOI

Siwen Hu,

Dayong Zhao, Rujia He

et al.

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145295 - 145295

Published: March 1, 2025

Language: Английский

Citations

0
Soil-derived Dissolved Organic Matter in Inland Wetlands along A Temperate River: Insights from Spectroscopic Characteristics Coupled with Machine Learning Methods DOI Creative Commons
Wenliang Ju, Dengke Ma, Meilian Chen

et al.

Water Research X, Journal Year: 2025, Volume and Issue: unknown, P. 100339 - 100339

Published: March 1, 2025

Language: Английский

Citations

0
From Retention Time to Functional Group Assignment: A Chemical Database‐Driven Approach for High‐Resolution Mass Data of Marine Dissolved Organic Matter DOI Creative Commons
Fabian Moye,

Marlo Bareth,

Boris Koch

et al.

Rapid Communications in Mass Spectrometry, Journal Year: 2025, Volume and Issue: 39(13)

Published: April 14, 2025

ABSTRACT Rationale The high chemodiversity of marine dissolved organic matter (DOM) has challenged identification singular DOM components. To infer chemical structure features with accurately determined molecular formulas, we assessed if empirically elution properties stoichiometrically identical isomers obtained from a database would predict features, such as the type and number functional groups, in structurally unknown isomers. Methods different origin (North Sea, Southern Ocean) was analysed by LC‐FT‐MS using two mass spectrometry methods. Chromatographic retention correlated calculated known PubChem. A total 7.7 million identifiers were queried for their computed octanol–water coefficients (logP). 50 most intense formulas PubChem data files. structural assigned to logP bins across window, correlate contribution database‐derived time Results intensity‐weighted average C x H y O z Ocean water, predicted all good agreement values stored comparatively longer same isomer North Sea versus suggests decoration fewer alcohol groups more ring structures esters. Earlier eluting are likely contain rings alcohols, while later ones linear/branched Conclusions We hypothesised belonging older water elute earlier than young less degraded molecules present water. This hypothesis verified based on three exemplarily selected cooccurring samples. Our strategy circumvents issues chimeric fragmentation spectra furthermore adds new physicochemical descriptor molecules.

Language: Английский

Citations

0
NMR as a Discovery Tool: Exploration of Industrial Effluents Discharged Into the Environment DOI Creative Commons

Kiera Ronda,

Jeremy R. Gauthier,

Khanisha Singaravadivel

et al.

Magnetic Resonance in Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 13, 2025

ABSTRACT NMR provides unprecedented molecular information, urgently needed by environmental researchers and policy makers. However, is underutilized in sciences due to the lack of available technologies, limited environmental‐specific training opportunities, easy‐to‐use workflows. has considerable potential as a discovery tool for novel pollutants, by‐products, exemplified recent degradation by‐product rubber additive, 6PPD‐quinone, now considered one most toxic compounds presently known. This work represents proof‐of‐concept case study highlighting use profile effluents from 38 industries across Ontario, Canada. Wastewater various industrial sectors were analyzed using several 1D 2D 1 H/ 13 C 19 F experiments screened both unconcentrated after lyophilization. Common species could be identified human metabolic databases, but databases desperately need further development. An example manually identifying unusual signatures included; these resulted phosphinic phosphonic acids originating electroplating industry, which impacts are not well understood. Basic H quantification performed ERETIC, while an optimized approach combining relaxation agents steady‐state‐free‐precession NMR, reduce detection limits (at 500 MHz) sub‐ppb (< μg/L) under 15 min, demonstrated. The future benchtop (80 also considered. paper guide others interested applying spectroscopy media demonstrates complementary assist MS pollutant discovery.

Language: Английский

Citations

0
Characteristics of water dissolved organic matter in Zoige alpine wetlands, China DOI Creative Commons

Jinzhi Wang,

Zhengyi Hu,

Lijuan Cui

et al.

Chemical and Biological Technologies in Agriculture, Journal Year: 2024, Volume and Issue: 11(1)

Published: Aug. 29, 2024

Dissolved organic matter (DOM) plays a significant role in the biogeochemical cycle of crucial elements aquatic ecosystem. However, it is still not clear on spectral characteristics water DOM different types alpine wetlands, which have less anthropogenic influences and intensive ultraviolet radiation. Here, we collected 107 samples from marsh, lake, river wetlands Zoige plateau, China, analyzed chemical characteristics, compositions, potential sources chromophoric by combining UV–vis spectroscopy excitation–emission matrix fluorescence coupled with parallel factor analysis (EEMs-PARAFAC). UVC UVA fulvic-like substances were prevailing components DOM, accounted for 23.74–71.59% 16.76–30.01% total intensity, respectively. Compared lake fluoresce intensities higher marsh wetland. Marsh possessed highest SUVA254, E2/E3, E2/E4, E4/E6 suggesting humification degree, relative molecular nominal size, aromaticity. And E2/E4 ratios most than 12, indicating was mainly derived autochthonous wetlands. Wetland strongly affected plateau. These findings may be beneficial sustainable management

Language: Английский

Citations

1
Reactivity and Molecular Transformation of Dissolved Organic Matter during the Treatment of Coal Gasification Wastewater DOI
Yuguo Li, Yahe Zhang, Min Liu

et al.

ACS ES&T Water, Journal Year: 2024, Volume and Issue: 4(11), P. 4908 - 4916

Published: Oct. 10, 2024

The coal gasification process generates a large amount of toxic and highly concentrated industrial wastewater, posing significant challenges for its efficient treatment due to the presence dissolved organic matter (DOM). This paper employs high-resolution tandem mass spectrometry delineate molecular composition structure characterization wastewater (CGW) DOM, as well reaction activity in processes. results showed that CGW DOM is predominantly composed oxygenated nitrogenous compounds, with inducing shift toward saturation oxidized states polyphenols polycyclic aromatic compounds. In comparison oxygen- sulfur-containing nitrogen-containing compounds posed greater challenge degradation, particularly those exist form nitrogen heterocycle rings. Furthermore, indene ring-based oxygen-containing exhibited lower removal efficiencies than their benzene counterparts during treatment. effluent from advanced oxidation processes mainly characterized by prevalence simple naphthenic rings, indenes, etc., conjunction multiple hydroxyl carboxyl functional groups. These observations are crucial comprehensive understanding pollutant transformation mechanisms, facilitating accurate effective implementation contributing energy conservation consumption reduction.

Language: Английский

Citations

1