Optimised recovery of lignin-derived phenols in a Scottish fjord by the CuO oxidation method

Pei Sun Loh, Axel E. J. Miller, Alison D. Reeves, S. Martyn Harvey, Julian Overnell

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    Lignin is found only in vascular plant tissues, hence monitoring of lignin in aquatic environments is important in the determination of the sources and fate of terrestrial organic matter (OM). Concentrations of lignin-derived phenols provide an estimate of the amount of terrestrial OM in a system. Other lignin parameters such as the ratios of syringyl to vanillyl (S/V) and cinnamyl to vanillyl (C/V) phenols provide information on vegetation sources; and the ratios of vanillic acid to vanillin, (Ad/Al)v, and syringic acid to syringaldehyde, (Ad/Al)s, indicate the degradation stage of lignin materials. Concentrations of lignin-derived phenols were determined for the surface and subsurface sediments of a Scottish sea loch, Loch Creran, using a CuO oxidation method. In order to achieve the highest methodological efficiency, a series of validation experiments for each procedural step were carried out. As a result, several procedural steps were optimized. It was found that a lower oxidation temperature resulted in higher product yield and the duration and temperature of the silylation step have no effect on the outcome of the process. Studies of seasonal variations of lignin parameters showed that the occasional increase in lignin content in sediment trap samples was attributable to materials discharged from River Creran and the incoming water from the direction of Creagan bridge. The flow regime caused resuspension of surface sediments and entrainment of lignin materials into the water column. Lignin parameters exhibited more significant trends across an axial transect of the loch (from the head to mouth). Total lignin content decreased and the C/V ratios increased from upper to lower Loch Creran as these lignin materials were transported further down the loch and were subjected to hydrodynamic sorting processes.

    Original languageEnglish
    Pages (from-to)1187-1194
    Number of pages8
    JournalJournal of Environmental Monitoring
    Volume10
    Issue number10
    DOIs
    Publication statusPublished - 2008

    Keywords

    • GULF-OF-MEXICO
    • TERRESTRIAL ORGANIC-MATTER
    • SURFACE SEDIMENTS
    • MARINE-SEDIMENTS
    • BALTIC SEA
    • HUMIC SUBSTANCES
    • CARBON
    • WASHINGTON
    • ESTUARY
    • RIVER

    Cite this

    Loh, Pei Sun ; Miller, Axel E. J. ; Reeves, Alison D. ; Harvey, S. Martyn ; Overnell, Julian. / Optimised recovery of lignin-derived phenols in a Scottish fjord by the CuO oxidation method. In: Journal of Environmental Monitoring. 2008 ; Vol. 10, No. 10. pp. 1187-1194.
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    title = "Optimised recovery of lignin-derived phenols in a Scottish fjord by the CuO oxidation method",
    abstract = "Lignin is found only in vascular plant tissues, hence monitoring of lignin in aquatic environments is important in the determination of the sources and fate of terrestrial organic matter (OM). Concentrations of lignin-derived phenols provide an estimate of the amount of terrestrial OM in a system. Other lignin parameters such as the ratios of syringyl to vanillyl (S/V) and cinnamyl to vanillyl (C/V) phenols provide information on vegetation sources; and the ratios of vanillic acid to vanillin, (Ad/Al)v, and syringic acid to syringaldehyde, (Ad/Al)s, indicate the degradation stage of lignin materials. Concentrations of lignin-derived phenols were determined for the surface and subsurface sediments of a Scottish sea loch, Loch Creran, using a CuO oxidation method. In order to achieve the highest methodological efficiency, a series of validation experiments for each procedural step were carried out. As a result, several procedural steps were optimized. It was found that a lower oxidation temperature resulted in higher product yield and the duration and temperature of the silylation step have no effect on the outcome of the process. Studies of seasonal variations of lignin parameters showed that the occasional increase in lignin content in sediment trap samples was attributable to materials discharged from River Creran and the incoming water from the direction of Creagan bridge. The flow regime caused resuspension of surface sediments and entrainment of lignin materials into the water column. Lignin parameters exhibited more significant trends across an axial transect of the loch (from the head to mouth). Total lignin content decreased and the C/V ratios increased from upper to lower Loch Creran as these lignin materials were transported further down the loch and were subjected to hydrodynamic sorting processes.",
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    author = "Loh, {Pei Sun} and Miller, {Axel E. J.} and Reeves, {Alison D.} and Harvey, {S. Martyn} and Julian Overnell",
    year = "2008",
    doi = "10.1039/b808970a",
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    Optimised recovery of lignin-derived phenols in a Scottish fjord by the CuO oxidation method. / Loh, Pei Sun; Miller, Axel E. J.; Reeves, Alison D.; Harvey, S. Martyn; Overnell, Julian.

    In: Journal of Environmental Monitoring, Vol. 10, No. 10, 2008, p. 1187-1194.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Optimised recovery of lignin-derived phenols in a Scottish fjord by the CuO oxidation method

    AU - Loh, Pei Sun

    AU - Miller, Axel E. J.

    AU - Reeves, Alison D.

    AU - Harvey, S. Martyn

    AU - Overnell, Julian

    PY - 2008

    Y1 - 2008

    N2 - Lignin is found only in vascular plant tissues, hence monitoring of lignin in aquatic environments is important in the determination of the sources and fate of terrestrial organic matter (OM). Concentrations of lignin-derived phenols provide an estimate of the amount of terrestrial OM in a system. Other lignin parameters such as the ratios of syringyl to vanillyl (S/V) and cinnamyl to vanillyl (C/V) phenols provide information on vegetation sources; and the ratios of vanillic acid to vanillin, (Ad/Al)v, and syringic acid to syringaldehyde, (Ad/Al)s, indicate the degradation stage of lignin materials. Concentrations of lignin-derived phenols were determined for the surface and subsurface sediments of a Scottish sea loch, Loch Creran, using a CuO oxidation method. In order to achieve the highest methodological efficiency, a series of validation experiments for each procedural step were carried out. As a result, several procedural steps were optimized. It was found that a lower oxidation temperature resulted in higher product yield and the duration and temperature of the silylation step have no effect on the outcome of the process. Studies of seasonal variations of lignin parameters showed that the occasional increase in lignin content in sediment trap samples was attributable to materials discharged from River Creran and the incoming water from the direction of Creagan bridge. The flow regime caused resuspension of surface sediments and entrainment of lignin materials into the water column. Lignin parameters exhibited more significant trends across an axial transect of the loch (from the head to mouth). Total lignin content decreased and the C/V ratios increased from upper to lower Loch Creran as these lignin materials were transported further down the loch and were subjected to hydrodynamic sorting processes.

    AB - Lignin is found only in vascular plant tissues, hence monitoring of lignin in aquatic environments is important in the determination of the sources and fate of terrestrial organic matter (OM). Concentrations of lignin-derived phenols provide an estimate of the amount of terrestrial OM in a system. Other lignin parameters such as the ratios of syringyl to vanillyl (S/V) and cinnamyl to vanillyl (C/V) phenols provide information on vegetation sources; and the ratios of vanillic acid to vanillin, (Ad/Al)v, and syringic acid to syringaldehyde, (Ad/Al)s, indicate the degradation stage of lignin materials. Concentrations of lignin-derived phenols were determined for the surface and subsurface sediments of a Scottish sea loch, Loch Creran, using a CuO oxidation method. In order to achieve the highest methodological efficiency, a series of validation experiments for each procedural step were carried out. As a result, several procedural steps were optimized. It was found that a lower oxidation temperature resulted in higher product yield and the duration and temperature of the silylation step have no effect on the outcome of the process. Studies of seasonal variations of lignin parameters showed that the occasional increase in lignin content in sediment trap samples was attributable to materials discharged from River Creran and the incoming water from the direction of Creagan bridge. The flow regime caused resuspension of surface sediments and entrainment of lignin materials into the water column. Lignin parameters exhibited more significant trends across an axial transect of the loch (from the head to mouth). Total lignin content decreased and the C/V ratios increased from upper to lower Loch Creran as these lignin materials were transported further down the loch and were subjected to hydrodynamic sorting processes.

    KW - GULF-OF-MEXICO

    KW - TERRESTRIAL ORGANIC-MATTER

    KW - SURFACE SEDIMENTS

    KW - MARINE-SEDIMENTS

    KW - BALTIC SEA

    KW - HUMIC SUBSTANCES

    KW - CARBON

    KW - WASHINGTON

    KW - ESTUARY

    KW - RIVER

    U2 - 10.1039/b808970a

    DO - 10.1039/b808970a

    M3 - Article

    VL - 10

    SP - 1187

    EP - 1194

    JO - Journal of Environmental Monitoring

    JF - Journal of Environmental Monitoring

    SN - 1464-0325

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    ER -