Organic matter character as a critical factor determining the fate and stability of its association with iron in sediments
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F22%3A00562700" target="_blank" >RIV/60077344:_____/22:00562700 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/00025798:_____/22:00000124 RIV/60076658:12310/22:43904979
Výsledek na webu
<a href="https://link.springer.com/article/10.1007/s11368-022-03207-x" target="_blank" >https://link.springer.com/article/10.1007/s11368-022-03207-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11368-022-03207-x" target="_blank" >10.1007/s11368-022-03207-x</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Organic matter character as a critical factor determining the fate and stability of its association with iron in sediments
Popis výsledku v původním jazyce
Purpose Complexes of organic matter (OM) with iron (Fe) oxyhydroxides (OM-Fe) prevent/reduce microbial degradation and enhance its stabilization in soils and sediments. Missing in most studies regarding the quality of OM-Fe complexes is in this study addressed by optical method characterization using absorbance and fluorescence, which is a unique approach in combination with sequential extraction methods. This study finds the quality of OM which promotes the stability of the OM-Fe aggregates with respect to the rate of redox dissolution of Fe mineral phases. Methods Sediment samples from a mesotrophic freshwater reservoir were sequentially extracted to distinguish Fe oxyhydroxides solubility at different dissolution times. This allowed us to assess the OM-Fe association with easily reducible Fe-bearing minerals vs. more stable yet reducible fractions. The quality of the sequentially extracted DOM associated with different redox reactivity mineral phases was evaluated by UV-Vis and fluorescence spectroscopy using a parallel factor analysis (PARAFAC) model. Results Humic-like substances render soluble and labile OM-Fe associations, while non-humic substances enhance the stability of such associations under reducing conditions. In anoxic sediments, non-humic substances are stabilized in the OM-Fe associations. Conclusion This study described the fate of OM-Fe in anoxic sediments by coupling sequential extractions with UV-Vis and fluorescence spectroscopy characterization. This is a new reliable and simple approach for evaluating the stability of OM-Fe aggregates in sediments, soils, and/or wastewater treatment sludge.
Název v anglickém jazyce
Organic matter character as a critical factor determining the fate and stability of its association with iron in sediments
Popis výsledku anglicky
Purpose Complexes of organic matter (OM) with iron (Fe) oxyhydroxides (OM-Fe) prevent/reduce microbial degradation and enhance its stabilization in soils and sediments. Missing in most studies regarding the quality of OM-Fe complexes is in this study addressed by optical method characterization using absorbance and fluorescence, which is a unique approach in combination with sequential extraction methods. This study finds the quality of OM which promotes the stability of the OM-Fe aggregates with respect to the rate of redox dissolution of Fe mineral phases. Methods Sediment samples from a mesotrophic freshwater reservoir were sequentially extracted to distinguish Fe oxyhydroxides solubility at different dissolution times. This allowed us to assess the OM-Fe association with easily reducible Fe-bearing minerals vs. more stable yet reducible fractions. The quality of the sequentially extracted DOM associated with different redox reactivity mineral phases was evaluated by UV-Vis and fluorescence spectroscopy using a parallel factor analysis (PARAFAC) model. Results Humic-like substances render soluble and labile OM-Fe associations, while non-humic substances enhance the stability of such associations under reducing conditions. In anoxic sediments, non-humic substances are stabilized in the OM-Fe associations. Conclusion This study described the fate of OM-Fe in anoxic sediments by coupling sequential extractions with UV-Vis and fluorescence spectroscopy characterization. This is a new reliable and simple approach for evaluating the stability of OM-Fe aggregates in sediments, soils, and/or wastewater treatment sludge.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10617 - Marine biology, freshwater biology, limnology
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Soils and Sediments
ISSN
1439-0108
e-ISSN
1614-7480
Svazek periodika
22
Číslo periodika v rámci svazku
6
Stát vydavatele periodika
DE - Spolková republika Německo
Počet stran výsledku
11
Strana od-do
1865-1875
Kód UT WoS článku
000779266700001
EID výsledku v databázi Scopus
2-s2.0-85127595454