Bark, a suitable biosorbent for the removal of uranium from wastewater-From laboratory to industry

Loïc Jauberty; Vincent Gloaguen; Cédric Astier; Vincent Delpech; Pierre Krausz; Isabelle Niort; A. Berland; Anne Royer; Jean-Louis Decossas

Bark, a suitable biosorbent for the removal of uranium from wastewater-From laboratory to industry

Loïc Jauberty ¹ Vincent Gloaguen ¹ Cédric Astier ¹ Vincent Delpech ¹ Pierre Krausz ¹ Isabelle Niort A. Berland Anne Royer Jean-Louis Decossas ^*

* Auteur correspondant

1 LCSN - Laboratoire de Chimie des Substances Naturelles

Abstract : This paper shows that natural materials such as barks can successfully replace synthetic resins for industrial purposes. Evaluated in batch conditions, biosorption of uranium on suitably prepared Douglas fir barks took place in less than 10 min and appeared to be optimum at pH>4. The biosorption process of uranium (uranyl form UO2 2+) was characterized in the optimal physico-chemical conditions and could be mathematically modeled as a Langmuir isotherm. With a maximum uranium specific uptake qmaxvalue of 1.16 meq.g-1 (138 mgU.g-1) it was found that the sorption capability of Douglas fir barks was at 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 then monitored over a one-month period in a laboratory-scale chromatography column. The fixation capacity remained fairly constant throughout the whole testing period. Water radioactivity decreased from 1500 mBq.L-1 (0.12 mgU.L-1) to <5 mBq.L-1(0.4 μ gU.L-1) at the column exit. This technology was successfully transferred and tested through a pilot project under industrial conditions with the support of AREVA

Type de document :

Article dans une revue

Domaine :

Chimie / Chimie organique

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https://hal-unilim.archives-ouvertes.fr/hal-00926588
Contributeur : Vincent Sol <>
Soumis le : jeudi 9 janvier 2014 - 18:49:19
Dernière modification le : mardi 20 mars 2018 - 16:36:08

Bark, a suitable biosorbent for the removal of uranium from wastewater-From laboratory to industry

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Bark, a suitable biosorbent for the removal of uranium from wastewater-From laboratory to industry

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