دورية أكاديمية
Iron Promotes the Retention of Terrigenous Dissolved Organic Matter in Subtidal Permeable Sediments.
| العنوان: | Iron Promotes the Retention of Terrigenous Dissolved Organic Matter in Subtidal Permeable Sediments. |
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| المؤلفون: | Zhou Z; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven 27570, Germany.; State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China., Waska H; Institute for Chemistry and Biology of the Marine Environment (ICBM), School of Mathematics and Science, Carl von Ossietzky Universität Oldenburg, Oldenburg 26129, Germany., Henkel S; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven 27570, Germany., Dittmar T; Institute for Chemistry and Biology of the Marine Environment (ICBM), School of Mathematics and Science, Carl von Ossietzky Universität Oldenburg, Oldenburg 26129, Germany.; Helmholtz Institute for Functional Marine Biodiversity, University of Oldenburg, Oldenburg 26129, Germany., Kasten S; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven 27570, Germany.; MARUM - Center for Marine Environmental Sciences, University of Bremen, Bremen 28359, Germany.; Faculty of Geosciences, University of Bremen, Bremen 28359, Germany., Holtappels M; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven 27570, Germany.; MARUM - Center for Marine Environmental Sciences, University of Bremen, Bremen 28359, Germany. |
| المصدر: | Environmental science & technology [Environ Sci Technol] 2024 Apr 09; Vol. 58 (14), pp. 6204-6214. Date of Electronic Publication: 2024 Apr 01. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 0213155 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5851 (Electronic) Linking ISSN: 0013936X NLM ISO Abbreviation: Environ Sci Technol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Washington DC : American Chemical Society Original Publication: Easton, Pa. : American Chemical Society, c1967- |
| مواضيع طبية MeSH: | Iron*/chemistry , Dissolved Organic Matter*, Seawater/chemistry ; Water ; Organic Chemicals |
| مستخلص: | Marine permeable sediments are important sites for organic matter turnover in the coastal ocean. However, little is known about their role in trapping dissolved organic matter (DOM). Here, we examined DOM abundance and molecular compositions (9804 formulas identified) in subtidal permeable sediments along a near- to offshore gradient in the German North Sea. With the salinity increasing from 30.1 to 34.6 PSU, the DOM composition in bottom water shifts from relatively higher abundances of aromatic compounds to more highly unsaturated compounds. In the bulk sediment, DOM leached by ultrapure water (UPW) from the solid phase is 54 ± 20 times more abundant than DOM in porewater, with higher H/C ratios and a more terrigenous signature. With 0.5 M HCl, the amount of leached DOM (enriched in aromatic and oxygen-rich compounds) is doubled compared to UPW, mainly due to the dissolution of poorly crystalline Fe phases (e.g., ferrihydrite and Fe monosulfides). This suggests that poorly crystalline Fe phases promote DOM retention in permeable sediments, preferentially terrigenous, and aromatic fractions. Given the intense filtration of seawater through the permeable sediments, we posit that Fe can serve as an important intermediate storage for terrigenous organic matter and potentially accelerate organic matter burial in the coastal ocean. |
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| فهرسة مساهمة: | Keywords: dissolved organic matter; iron; permeable sediments; redox cycling; terrestrial input |
| المشرفين على المادة: | E1UOL152H7 (Iron) 0 (Dissolved Organic Matter) 059QF0KO0R (Water) 0 (Organic Chemicals) |
| تواريخ الأحداث: | Date Created: 20240401 Date Completed: 20240410 Latest Revision: 20240425 |
| رمز التحديث: | 20240425 |
| مُعرف محوري في PubMed: | PMC11008242 |
| DOI: | 10.1021/acs.est.3c09531 |
| PMID: | 38557085 |
| قاعدة البيانات: | MEDLINE |
Find this issue from the American Chemical Society | تدمد: | 1520-5851 |
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| DOI: | 10.1021/acs.est.3c09531 |