The removal of metallic ions La3+, Eu3+ and Yb3+ from aqueous solution by immobilized biomass of Pseudomonas aeruginosa was investigated in batch and column reactors. Batch studies consisted in kinetic measurements for lanthanum adsorption by biomass-chitosan beads. Results did not show a significant effect of the presence of bacteria into chitosan matrix on the lanthanum uptake. Then, laboratory-scale fixed-bed column experiments were carried out using biomass-entrapped polyacrylamide gel beads, which contained approximately 48% (dry weight basis) of biomass. The lanthanum sorption was dependent on the superficial liquid velocity based on empty column in the range 0.76–2.29 m.h-1. The removal of lanthanide cations (2 mM) at pH 5.0 and 0.76 m/h was 198 μmol.g-1 (dry biomass) for lanthanum, 167 μmol.g-1 for europium and 192 μmol.g-1 for ytterbium (±10%). These results are of the order of 1.7–2 times lower than those observed in batch systems with free bacterial cells. Column experiments with mixed-cationsolutions showed the following sequence of preferential biosorption: Eu3+ >Yb3+ >La3+.
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Research Article|
September 01 2000
Selective biosorption of lanthanide (La, Eu, Yb) ions by an immobilized bacterial biomass
A.-C. Texier;
A.-C. Texier
*Département Systèmes Energétiques et Environnement, Ecole des Mines de Nantes, 4 rue Alfred Kastler, BP 20722, 44307 Nantes cedex 03, France
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Y. Andrès;
Y. Andrès
**Subatech UMR 6457, Ecole des Mines de Nantes, 4 rue Alfred Kastler, BP 20722, 44307 Nantes cedex 03, France
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P. Le Cloirec
P. Le Cloirec
*Département Systèmes Energétiques et Environnement, Ecole des Mines de Nantes, 4 rue Alfred Kastler, BP 20722, 44307 Nantes cedex 03, France
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Water Sci Technol (2000) 42 (5-6): 91–94.
Citation
A.-C. Texier, Y. Andrès, P. Le Cloirec; Selective biosorption of lanthanide (La, Eu, Yb) ions by an immobilized bacterial biomass. Water Sci Technol 1 September 2000; 42 (5-6): 91–94. doi: https://doi.org/10.2166/wst.2000.0500
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