Fractionation and characterization of dissolved organic matter (DOM) in refinery wastewater by revised phase retention and ion-exchange adsorption solid phase extraction followed by ESI FT-ICR MS

Fang, Zhi; He, Chen; Li, Yongyong; Chung, Keng H.; Chen, Xu; Shi, Quan

doi:10.1016/j.talanta.2016.10.064

Cited by 64 publications

(35 citation statements)

References 28 publications

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“…As such, the low values of DBE (i.e., <10) suggest that aromatic compounds may not be enriched in the HPOA and HPIN/B fractions. Such relatively low DBE values have also been reported for the HPOA fraction in other studies [6,7]. Although the TPIA fraction showed the highest DBE (12.3) among the three chemical fractions for this study, the fraction is not likely to contain a large amount of aromatic compounds, especially in condensed structures, because the DBE/C (0.5) was lower than threshold value of >0.7, which represents molecules with condensed aromatic rings [35].…”

Section: Comparison Of Molecular Composition Of the Three Chemical Frsupporting

confidence: 74%

“…Thus, there is no doubt that separating relatively homogeneous fractions from bulk DOM samples with respect to the chemical characteristics/composition would provide great benefits for DOM studies. In practice, this approach has been widely used as a pre-treatment method prior to further characterization of DOM structures [5][6][7]. The most common technique used to isolate chemically homogeneous DOM structures is via a sequence of fractionation through different types of resins with respect to hydrophobicity (or polarity).…”

Section: Introductionmentioning

confidence: 99%

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Comparing the Spectroscopic and Molecular Characteristics of Different Dissolved Organic Matter Fractions Isolated by Hydrophobic and Anionic Exchange Resins Using Fluorescence Spectroscopy and FT-ICR-MS

Derrien

Lee

Hur

2017

Water

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Despite the environmental significance of dissolved organic matter (DOM), characterizing DOM is still challenging due to its structural complexity and heterogeneity. In this study, three different chemical fractions, including hydrophobic acid (HPOA), transphilic acid (TPIA), and hydrophilic neutral and base (HPIN/B) fractions, were separated from bulk aquatic DOM samples, and their spectral features and the chemical composition at the molecular level were compared using both fluorescence excitation emission matrix-parallel factor analysis (EEM-PARAFAC) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The HPIN/B fraction was distinguished from the two acidic fractions (i.e., HPOA and TPIA) by the EEM-PARAFAC, while the TPIA fraction was discriminated by using the molecular parameters derived from the FT-ICR MS analyses. Statistical comparison suggests that the spectral dissimilarity among the three chemical fractions might result from the acido-basic properties of DOM samples, while the differences in molecular composition were more likely to be affected by the hydrophobicity of the DOM fractions. The non-metric multidimensional scaling map further revealed that the HPOA was the most heterogeneous among the three fractions. The number of overlapping formulas among the three chemical fractions constituted only <5% of all identified formulas, and those between two different fractions ranged from 2.0% to 24.1%, implying relatively homogeneous properties of the individual chemical fractions with respect to molecular composition. Although employing chemical fractionation achieved a lowering of the DOM heterogeneity, prevalent signatures of either acido-basic property or the hydrophobic nature of DOM on the characteristics of three chemical isolated fractions were not found for this study.

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Section: Comparison Of Molecular Composition Of the Three Chemical Frsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Comparing the Spectroscopic and Molecular Characteristics of Different Dissolved Organic Matter Fractions Isolated by Hydrophobic and Anionic Exchange Resins Using Fluorescence Spectroscopy and FT-ICR-MS

Derrien

Lee

Hur

2017

Water

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“…Refractory humic acid fractions are marked by increases in the condensed aromatic components with the highest DBE [40]. Humification processes involved in soil-derived organic matter formation are progressions where H/C ratios are steadily reduced [40] and the maximum molecular mass (24) 624 (18) 1842 (42) Sum of peak magnitudes assigned to fatty acids and sulfonic acids (×10 6 ) 19052 (25) 2394 (4) 1120 (2) Carbohydrates (×10 6 ) 0 (0) 0 (0) 0 (0) Unsaturated aliphatic compounds containing N (×10 6 ) 0 (0) 3 (0) 0 (0) Unsaturated aliphatic compounds (×10 6 Journal of Chemistry of condensed aromatic components is increased [19]. ere are more unsaturated aliphatic compounds in JFHA.…”

Section: Van Krevelen Diagram Analysismentioning

confidence: 99%

“…Due to its high resolution and accuracy, it can assign unique molecular formula to thousands of compounds [24]. Moreover, as a soft ionization technology, negative ion mode electrospray ionization (ESI) has high selectivity for polar molecules in complex mixtures [25], which can avoid complex separation procedures [26]. e purpose of this work is to investigate the molecular compositions of HAs from soil, river, and leonardite using ESI FT-ICR MS. e specific objectives are to (1) compare the diversity of molecular composition between HAs from different resources and (2) discuss the lability of diverse HAs.…”

Section: Introductionmentioning

confidence: 99%

Molecular Signatures of Humic Acids from Different Sources as Revealed by Ultrahigh Resolution Mass Spectrometry

Qin

et al. 2020

Journal of Chemistry

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Humic acid (HA) is extremely important for understanding the geochemical cycle of pollutants in different environments. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) has performed molecular-level analysis of two standard HAs from the Suwannee River (SRHA) and leonardite (LEHA) and HA from Jiufeng forest in Beijing (JFHA), which is impossible for other conventional instruments. Regardless of the source of HA, compounds containing more heteroatoms (such as nitrogen and sulfur) have a higher degree of unsaturation and aromaticity. JFHA, SRHA, and LEHA from soil, river, and leonardite, respectively, are arranged in order from the lowest to highest degree of humification, according to molecular unsaturation and aromaticity of HAs. Soil HA is more labile and contains many large molecular weight compounds with low unsaturation. Regardless of unsaturation, molecules of River HA have a homogeneous molecular mass distribution and contain many plant-derived lignin- and tannin-like compounds, which are more stable than lipid and more labile than condensed aromatics. Leonardite HA with a high degree of humification contains a large number of compounds with high aromaticity and more heteroatoms and has low lability. Our results reveal the diversity of humic acid at molecular level because of different degree of humification and the lability. These conclusions are significant for understanding the role of humic acid from different sources in pollutant transformation and the geochemical cycle at the molecular level.

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“…Since each detected mass peak can be analyzed for possible elemental com-position based on predefined chemical constraints, ESI FT-ICR-MS is regarded as a viable method to directly ascertain molecular composi-tion of each constituent in a complicated matrix without any prior ex-traction or separation steps (Han et al, 2016;Herzsprung et al, 2016). Till now, ESI FT-ICR-MS has been successfully applied to various fields, including 1) environmental science, e.g., characterization of organic matter at the detailed molecular level in natural waters (Altieri et al, 2009b;Herzsprung et al, 2016;Lv et al, 2016;Wozniak et al, 2008) and refinery wastewater (Fang et al, 2017), atmospheric dissolved organic nitrogen in precipitation (Altieri et al, 2009a), and organo-sulfates in atmospheric samples) (Schmitt-Kopplin et al, 2010); 2) medicine industry (e.g., investigation of the characteristic fragment ions of phillyrin) (Lin et al, 2016); 3) biology (e.g., identification of peptide de novo amino acid sequencing for a seven-protein mixture) (Guan et al, 2017), and characterization of the covalent interactions between cisplatin and Cox17-a key copper chaperone protein ; and 4) energy industry (e.g., analysis of oxygen compounds in the total organic acid content of crude oils) (Rojas-Ruiz and Orrego-Ruiz, 2016).…”

Section: Degradation Pathway Of 2-picolinic Acid By Strain Zd1mentioning

confidence: 99%

Isolation of a 2-picolinic acid-assimilating bacterium and its proposed degradation pathway

Zheng

Wang

Yan-li

et al. 2017

Bioresource Technology

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Burkholderia sp. ZD1, aerobically utilizes 2-picolinic acid as a source of carbon, nitrogen and energy, was isolated. ZD1 completely degraded 2-picolinic acid when the initial concentrations ranged from 25 to 300mg/L. Specific growth rate (μ) and specific consumption rate (q) increased continually in the concentration range of 25-100mg/L, and then declined. Based on the Haldane model and Andrew's model, μ and q were calculated as 3.9 and 16.5h, respectively. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) was used to determine the main intermediates in the degradation pathway. Moreover, attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) was innovatively used to deduce the ring cleavage mechanism of N-heterocycle of 2-picolinic acid. To our knowledge, this is the first report on not only the utilization of 2-picolinic acid by a Burkholderia sp., but also applying FT-ICR-MS and ATR-FTIR for exploring the biodegradation pathway of organic compounds.

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Fractionation and characterization of dissolved organic matter (DOM) in refinery wastewater by revised phase retention and ion-exchange adsorption solid phase extraction followed by ESI FT-ICR MS

Cited by 64 publications

References 28 publications

Comparing the Spectroscopic and Molecular Characteristics of Different Dissolved Organic Matter Fractions Isolated by Hydrophobic and Anionic Exchange Resins Using Fluorescence Spectroscopy and FT-ICR-MS

Comparing the Spectroscopic and Molecular Characteristics of Different Dissolved Organic Matter Fractions Isolated by Hydrophobic and Anionic Exchange Resins Using Fluorescence Spectroscopy and FT-ICR-MS

Molecular Signatures of Humic Acids from Different Sources as Revealed by Ultrahigh Resolution Mass Spectrometry

Isolation of a 2-picolinic acid-assimilating bacterium and its proposed degradation pathway

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