Iron, Cobalt, and Gadolinium Transport in Methanogenic Granules Measured by 3D Magnetic Resonance Imaging

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F16%3A43902956" target="_blank" >RIV/60461373:22320/16:43902956 - isvavai.cz</a>

Výsledek na webu

<a href="http://journal.frontiersin.org/article/10.3389/fenvs.2016.00013/full" target="_blank" >http://journal.frontiersin.org/article/10.3389/fenvs.2016.00013/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fenvs.2016.00013" target="_blank" >10.3389/fenvs.2016.00013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Iron, Cobalt, and Gadolinium Transport in Methanogenic Granules Measured by 3D Magnetic Resonance Imaging

Popis výsledku v původním jazyce

Description of processes such as bioaccumulation, bioavailability and biosorption of heavy metals in biofilm matrixes requires the quantification of their transport. This study shows 3D MRI measurements of the penetration of free (Fe2+, Co2+ and Gd3+) and complexed ([FeEDTA]2MINUS SIGN and [GdDTPA]2MINUS SIGN ) metal ions in a single methanogenic granule. Interactions (sorption or precipitation) between free metals and the biofilm matrix result in extreme shortening of the spin-spin relaxation time (T2) and a decrease of the amplitude (A0) of the MRI signal, which hampers the quantification of the metal concentration inside the granular sludge matrix. MRI images clearly showed the presence of distinct regions (dead or living biomass, cracks, and precipitates) in the granular matrix, which influenced the metal transport. For the free metal ions, a reactive barrier was formed that moved through the granule, especially in the case of Gd3+. Chelated metals penetrated faster and without reaction front. Diffusion of [GdDTPA]2MINUS SIGN could be quantified, revealing the course of its transport and the uneven (0.2-0.4 mmol.LMINUS SIGN 1) distribution of the final [GdDTPA]2MINUS SIGN concentration within the granular biofilm matrix at equilibrium.

Název v anglickém jazyce

Iron, Cobalt, and Gadolinium Transport in Methanogenic Granules Measured by 3D Magnetic Resonance Imaging

Popis výsledku anglicky

Description of processes such as bioaccumulation, bioavailability and biosorption of heavy metals in biofilm matrixes requires the quantification of their transport. This study shows 3D MRI measurements of the penetration of free (Fe2+, Co2+ and Gd3+) and complexed ([FeEDTA]2MINUS SIGN and [GdDTPA]2MINUS SIGN ) metal ions in a single methanogenic granule. Interactions (sorption or precipitation) between free metals and the biofilm matrix result in extreme shortening of the spin-spin relaxation time (T2) and a decrease of the amplitude (A0) of the MRI signal, which hampers the quantification of the metal concentration inside the granular sludge matrix. MRI images clearly showed the presence of distinct regions (dead or living biomass, cracks, and precipitates) in the granular matrix, which influenced the metal transport. For the free metal ions, a reactive barrier was formed that moved through the granule, especially in the case of Gd3+. Chelated metals penetrated faster and without reaction front. Diffusion of [GdDTPA]2MINUS SIGN could be quantified, revealing the course of its transport and the uneven (0.2-0.4 mmol.LMINUS SIGN 1) distribution of the final [GdDTPA]2MINUS SIGN concentration within the granular biofilm matrix at equilibrium.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EI - Biotechnologie a bionika

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Frontiers in Environmental Science

ISSN

2296-665X

e-ISSN

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Svazek periodika

4

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

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EID výsledku v databázi Scopus

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