Keyword search (4,164 papers available)

"Balind K" Authored Publications:

Title Authors PubMed ID
1 Organic matter preservation through complexation with iron minerals in two basins of a dimictic boreal lake with contrasting deep water redox regimes Joshani A; Mirzaei Y; Barber A; Balind K; Gobeil C; Gélinas Y; 38499107
CHEMBIOCHEM
2 Preservation of organic matter in marine sediments by inner-sphere interactions with reactive iron. Barber A, Brandes J, Leri A, Lalonde K, Balind K, Wirick S, Wang J, Gélinas Y 28336935
CHEMBIOCHEM

 

Title:Preservation of organic matter in marine sediments by inner-sphere interactions with reactive iron.
Authors:Barber A,  Brandes J,  Leri A,  Lalonde K,  Balind K,  Wirick S,  Wang J,  Gélinas Y
Link:https://www.ncbi.nlm.nih.gov/pubmed/28336935?dopt=Abstract
Publication:
Keywords:
PMID:28336935 Category:Sci Rep Date Added:2019-05-31
Dept Affiliation: CHEMBIOCHEM
1 GEOTOP and the Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke West, Montréal, Quebec, H4B 1R6, Canada.
2 Skidaway Institute of Oceanography, University of Georgia, 10 Ocean Science Circle, Savannah, GA, 31411, USA.
3 Department of Natural Sciences, Marymount Manhattan College, 221 E 71st St., New York, New York, 10021, USA.
4 National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY, 11973, USA.
5 Canadian Light Source Inc, Saskatoon, Saskatchewan, S7N 0X4, Canada.
6 GEOTOP and the Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke West, Montréal, Quebec, H4B 1R6, Canada. yves.gelinas@concordia.ca.

Description:

Preservation of organic matter in marine sediments by inner-sphere interactions with reactive iron.

Sci Rep. 2017 03 23;7(1):366

Authors: Barber A, Brandes J, Leri A, Lalonde K, Balind K, Wirick S, Wang J, Gélinas Y

Abstract

Interactions between organic matter and mineral matrices are critical to the preservation of soil and sediment organic matter. In addition to clay minerals, Fe(III) oxides particles have recently been shown to be responsible for the protection and burial of a large fraction of sedimentary organic carbon (OC). Through a combination of synchrotron X-ray techniques and high-resolution images of intact sediment particles, we assessed the mechanism of interaction between OC and iron, as well as the composition of organic matter co-localized with ferric iron. We present scanning transmission x-ray microscopy images at the Fe L3 and C K1 edges showing that the organic matter co-localized with Fe(III) consists primarily of C=C, C=O and C-OH functional groups. Coupling the co-localization results to iron K-edge X-ray absorption spectroscopy fitting results allowed to quantify the relative contribution of OC-complexed Fe to the total sediment iron and reactive iron pools, showing that 25-62% of total reactive iron is directly associated to OC through inner-sphere complexation in coastal sediments, as much as four times more than in low OC deep sea sediments. Direct inner-sphere complexation between OC and iron oxides (Fe-O-C) is responsible for transferring a large quantity of reduced OC to the sedimentary sink, which could otherwise be oxidized back to CO2.

PMID: 28336935 [PubMed]




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