Organic matter character as a critical factor determining the fate and stability of its association with iron in sediments

Result code in 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>

Alternative codes found

RIV/00025798:_____/22:00000124 RIV/60076658:12310/22:43904979

Result on the web

<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>

Result language

angličtina

Original language name

Organic matter character as a critical factor determining the fate and stability of its association with iron in sediments

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10617 - Marine biology, freshwater biology, limnology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Soils and Sediments

ISSN

1439-0108

e-ISSN

1614-7480

Volume of the periodical

22

Issue of the periodical within the volume

6

Country of publishing house

DE - GERMANY

Number of pages

11

Pages from-to

1865-1875

UT code for WoS article

000779266700001

EID of the result in the Scopus database

2-s2.0-85127595454