Distribution, speciation and composition of humic substances in a macro-tidal temperate estuary
| Autor: | Matthieu Waeles, Ricardo Riso, Manon Mastin, Gabriel Dulaquais, Romain Davy, Arthur Aschehoug, Agathe Laes-Huon, Jérémy Devesa |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences media_common.quotation_subject Size-exclusion chromatography Humic substances Aquatic Science Oceanography 01 natural sciences Organic matter 14. Life underwater 0105 earth and related environmental sciences media_common Detection limit chemistry.chemical_classification geography geography.geographical_feature_category Chemistry 010604 marine biology & hydrobiology Estuary Suspended particulate matter Biogeochemistry Particulates Contamination 6. Clean water Speciation Certified reference materials 13. Climate action Environmental chemistry |
| Zdroj: | Estuarine Coastal And Shelf Science (0272-7714) (Elsevier BV), 2021-07, Vol. 255, P. 107360 (10p.) |
| ISSN: | 0272-7714 |
| Popis: | In aquatic environments, the term humic substances (HS) encompasses terrestrial and autochthonous refractory organic matter. HS are one of the main fractions of natural organic matter and are important chelators of trace elements. In environmental studies, the determination of HS is often restricted to the dissolved fraction, and the content of HS in the suspended particles remains unknown. In this work, we present the composition and dynamics of HS along the mixing gradient of a macrotidal estuary in both the dissolved and particulate fraction. After the isolation of particulate HS using a solid-liquid alkali extraction method, HS were characterized by size exclusion chromatography (SEC) and electrochemical methods. The method, validated using a certified reference material, demonstrated a low detection limit (μg-C L−1), a good repeatability (7.7%) an excellent reproducibility (1.3%) and was poorly prone to contamination (filter blank |
| Databáze: | OpenAIRE |
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