globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2017.11.015
Scopus记录号: 2-s2.0-85036632033
论文题名:
Extensive processing of sediment pore water dissolved organic matter during anoxic incubation as observed by high-field mass spectrometry (FTICR-MS)
作者: Valle J.; Gonsior M.; Harir M.; Enrich-Prast A.; Schmitt-Kopplin P.; Bastviken D.; Conrad R.; Hertkorn N.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129
起始页码: 252
结束页码: 263
语种: 英语
英文关键词: Anaerobic respiration ; DOM ; FTICR-MS ; Methane ; Sediment ; Solid phase extraction
Scopus关键词: Biodegradation ; Biogeochemistry ; Carbon dioxide ; Gas chromatography ; Greenhouse gases ; Lakes ; Mass spectrometry ; Metabolites ; Methane ; Mineralogy ; Molecules ; Organic carbon ; Phase separation ; Sediments ; Synthesis (chemical) ; Water ; Anaerobic degradation ; Anaerobic mineralization ; Anaerobic respiration ; Dissolved organic matters ; FT-ICR MS ; Microbial degradation ; Solid-phase extraction ; Ultrahigh resolution mass spectrometries ; Anoxic sediments ; alicyclic compound ; aromatic compound ; carbon ; carbon dioxide ; carboxyl rich alicyclic acid ; dissolved organic matter ; element ; fulvic acid ; lignin ; lipid ; methane ; organic carbon ; organic matter ; penicilloyl polylysine ; resin ; tannin ; unclassified drug ; water ; carbon ; organic compound ; water ; anaerobic digestion ; anoxic conditions ; biomineralization ; dissolved organic matter ; extraction method ; lacustrine deposit ; mass spectrometry ; methane ; molecular analysis ; oxidation ; porewater ; respiration ; sediment chemistry ; surficial sediment ; transformation ; Article ; biotransformation ; bulk density ; carbon mineralization ; chemical composition ; fractionation ; gas chromatography ; incubation time ; ion cyclotron resonance mass spectrometry ; lake ; large scale production ; metabolite ; molecule ; oxidation ; oxygen evolution ; oxygenation ; priority journal ; sediment ; solid phase extraction ; anaerobic growth ; chemistry ; electrospray mass spectrometry ; lake ; mass fragmentography ; mass spectrometry ; metabolism ; molecular weight ; oxidation reduction reaction ; Methane ; Respiration ; Sediments ; Norway ; Anaerobiosis ; Carbon ; Carbon Dioxide ; Gas Chromatography-Mass Spectrometry ; Lakes ; Mass Spectrometry ; Methane ; Molecular Weight ; Organic Chemicals ; Oxidation-Reduction ; Solid Phase Extraction ; Spectrometry, Mass, Electrospray Ionization ; Water
英文摘要: Dissolved organic matter (DOM) contained in lake sediments is a carbon source for many microbial degradation processes, including aerobic and anaerobic mineralization. During anaerobic degradation, DOM is partially consumed and transformed into new molecules while the greenhouse gases methane (CH4) and carbon dioxide (CO2) are produced. In this study, we used ultrahigh resolution mass spectrometry to trace differences in the composition of solid-phase extractable (PPL resin) pore water DOM (SPE-DOM) isolated from surface sediments of three boreal lakes before and after 40 days of anoxic incubation, with concomitant determination of CH4 and CO2 evolution. CH4 and CO2 production detected by gas chromatography varied considerably among replicates and accounted for fractions of ∼2–4 × 10−4 of sedimentary organic carbon for CO2 and ∼0.8–2.4 × 10−5 for CH4. In contrast, the relative changes of key bulk parameters during incubation, such as relative proportions of molecular series, elemental ratios, average mass and unsaturation, were regularly in the percent range (1–3% for compounds decreasing and 4–10% for compounds increasing), i.e. several orders of magnitude higher than mineralization alone. Computation of the average carbon oxidation state in CHO molecules of lake pore water DOM revealed rather non-selective large scale transformations of organic matter during incubation, with depletion of highly oxidized and highly reduced CHO molecules, and formation of rather non-labile fulvic acid type molecules. In general, proportions of CHO compounds slightly decreased. Nearly saturated CHO and CHOS lipid-like substances declined during incubation: these rather commonplace molecules were less specific indicators of lake sediment alteration than the particular compounds, such as certain oxygenated aromatics and carboxyl-rich alicyclic acids (CRAM) found more abundant after incubation. There was a remarkable general increase in many CHNO compounds during incubation across all lakes. Differences in DOM transformation between lakes corresponded with lake size and water residence time. While in the small lake Svarttjärn, CRAM increased during incubation, lignin-and tannin-like compounds were enriched in the large lake Bisen, suggesting selective preservation of these rather non-labile aromatic compounds rather than recent synthesis. SPE-DOM after incubation may represent freshly synthesized compounds, leftover bulk DOM which is primarily composed of intrinsically refractory molecules and/or microbial metabolites which were not consumed in our experiments. In spite of a low fraction of the total DOM being mineralized to CO2 and CH4, the more pronounced change in molecular DOM composition during the incubation indicates that diagenetic modification of organic matter can be substantial compared to complete mineralization. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113101
Appears in Collections:气候减缓与适应

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作者单位: Helmholtz Zentrum Munich, German Research Center for Environmental Health, Neuherberg, Germany; University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, Solomons, United States; Department for Chemical-Technical Analysis, Research Center Weihenstephan for Brewing and Food Quality, Technische Universität München, Freising-Weihenstephan, Germany; Linköping University, Department of Thematic Studies–Environmental Change, Linköping, Sweden; Federal University of Rio de Janeiro, Department of Botany, Rio de Janeiro, Brazil; Max Planck Institute for Terrestrial Microbiology, Marburg, Germany

Recommended Citation:
Valle J.,Gonsior M.,Harir M.,et al. Extensive processing of sediment pore water dissolved organic matter during anoxic incubation as observed by high-field mass spectrometry (FTICR-MS)[J]. Water Research,2018-01-01,129
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