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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EI - Biotechnology and bionics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Frontiers in Environmental Science

ISSN

2296-665X

e-ISSN

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Volume of the periodical

4

Issue of the periodical within the volume

13

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

1-8

UT code for WoS article

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EID of the result in the Scopus database

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