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Bark, a suitable biosorbent for the removal of uranium fromwastewater – From laboratory to industry

Published online by Cambridge University Press:  16 December 2011

L. Jauberty ,
V. Gloaguen ,
C. Astier ,
P. Krausz ,
V. Delpech ,
A. Berland ,
V. Granger ,
I. Niort ,
A. Royer  and
J.-L. Decossas
L. Jauberty
Affiliation:
Laboratoire de Chimie des Substances Naturelles EA1069, Faculté des Sciences et Techniques, 123 avenue Albert Thomas, 87060 Limoges, France Pe@rL SAS, 83 rue d’Isle, 87000 Limoges, France
V. Gloaguen
Affiliation:
Laboratoire de Chimie des Substances Naturelles EA1069, Faculté des Sciences et Techniques, 123 avenue Albert Thomas, 87060 Limoges, France
C. Astier
Affiliation:
Laboratoire de Chimie des Substances Naturelles EA1069, Faculté des Sciences et Techniques, 123 avenue Albert Thomas, 87060 Limoges, France
P. Krausz
Affiliation:
Laboratoire de Chimie des Substances Naturelles EA1069, Faculté des Sciences et Techniques, 123 avenue Albert Thomas, 87060 Limoges, France
V. Delpech
Affiliation:
Laboratoire de Chimie des Substances Naturelles EA1069, Faculté des Sciences et Techniques, 123 avenue Albert Thomas, 87060 Limoges, France Pe@rL SAS, 83 rue d’Isle, 87000 Limoges, France
A. Berland
Affiliation:
Pe@rL SAS, 83 rue d’Isle, 87000 Limoges, France
V. Granger
Affiliation:
Pe@rL SAS, 83 rue d’Isle, 87000 Limoges, France
I. Niort
Affiliation:
Pe@rL SAS, 83 rue d’Isle, 87000 Limoges, France
A. Royer
Affiliation:
Pe@rL SAS, 83 rue d’Isle, 87000 Limoges, France
J.-L. Decossas
Affiliation:
Pe@rL SAS, 83 rue d’Isle, 87000 Limoges, France
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Abstract

This paper shows that natural materials such as barks can successfully replace syntheticresins for industrial purposes. Evaluated in batch conditions, biosorption of uranium onsuitably prepared Douglas fir barks took place in less than 10 min and appeared to beoptimum at pH>4. The biosorption process of uranium (uranyl formUO\hbox{$_{\mathrm{\mathbf{2}}}^{\mathrm{\mathbf{2+}}}$}2+2)was characterized in the optimal physico-chemical conditions and could be mathematicallymodeled as a Langmuir isotherm. With a maximum uranium specific uptakeqmaxvalue of 1.16 meq.g-1 (138mgU.g-1) it was found that the sorption capability of Douglas fir barks wasat least five times higher for uranium than for other heavy metals such as lead.Adsorption of uranium contained in water leached from a former uranium mine was thenmonitored over a one-month period in a laboratory-scale chromatography column. Thefixation capacity remained fairly constant throughout the whole testing period. Waterradioactivity decreased from 1500 mBq.L-1 (0.12 mgU.L-1) to <5 mBq.L-1(0.4 μ gU.L-1) at the columnexit. This technology was successfully transferred and tested through a pilot projectunder industrial conditions with the support of AREVA NC.

Keywords

Uraniumbiosorptionwater treatmentbarks
Type
Research Article
Information
Radioprotection , Volume 46 , Issue 4 , October 2011 , pp. 443 - 456
Copyright
© EDP Sciences, 2011

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