Sorption behavior of europium(III) and curium(III) on the cell surfaces of microorganisms
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| 024 | 7 | 0 | |a 10.1524/ract.92.9.741.55006 |2 doi |
| 035 | |a (NATIONALLICENCE)gruyter-10.1524/ract.92.9.741.55006 | ||
| 245 | 0 | 0 | |a Sorption behavior of europium(III) and curium(III) on the cell surfaces of microorganisms |h [Elektronische Daten] |c [Takuo Ozaki, J. B. Gillow, Takaumi Kimura, T. Ohnuki, Zenko Yoshida, Arokiasamy J. Francis] |
| 520 | 3 | |a We investigated the association of europium(III) and curium(III) with the microorganisms Chlorella vulgaris, Bacillus subtilis, Pseudomonas fluorescens, Halomonas sp., Halobacterium salinarum, and Halobacterium halobium . We determined the kinetics and distribution coefficients (Kd) for Eu(III) and Cm(III) sorption at pH 3-5 by batch experiments, and evaluated the number of water molecules in the inner-sphere (NH₂O) and the degree of strength of ligand field (RE/M) for Eu(III) by time-resolved laser-induced fluorescence spectroscopy (TRLFS). Exudates from C. vulgaris, Halomonas sp., and H. halobium had an affinity for Eu(III) and Cm(III). The log Kd of Eu(III) and Cm(III) showed that their sorption was not fully due to the exchange with three protons on the functional groups on cell surfaces. The halophilic microorganisms (Halomonas sp., Halobacterium salinarum, H. halobium) showed almost no pH dependence in log Kd, indicating that an exchange with Na+ on the functional groups was involved in their sorption. The Δ NH₂O(=9-NH₂O) for Eu(III) on C. vulgaris was 1-3, while that for the other microorganisms was over 3, demonstrating that the coordination of Eu(III) with C. vulgaris was predominantly an outer-spherical process. The RE/M for Eu(III) on halophilic microorganisms was 2.5-5, while that for non-halophilic ones was 1-2.5. This finding suggests that the coordination environment of Eu(III) on the halophilic microorganisms is more complicated than that on the other three non-halophilic ones. | |
| 540 | |a © 2004 Oldenbourg Wissenschaftsverlag GmbH | ||
| 690 | 7 | |a Laboratory techniques, experiments |2 nationallicence | |
| 690 | 7 | |a Analytical chemistry |2 nationallicence | |
| 690 | 7 | |a Inorganic chemistry |2 nationallicence | |
| 700 | 1 | |a Ozaki |D Takuo |4 aut | |
| 700 | 1 | |a Gillow |D J. B. |4 aut | |
| 700 | 1 | |a Kimura |D Takaumi |4 aut | |
| 700 | 1 | |a Ohnuki |D T. |4 aut | |
| 700 | 1 | |a Yoshida |D Zenko |4 aut | |
| 700 | 1 | |a Francis |D Arokiasamy J. |4 aut | |
| 773 | 0 | |t Radiochimica Acta/International journal for chemical aspects of nuclear science and technology |d Oldenbourg Wissenschaftsverlag GmbH |g 92/9-11/2004(2004-11-01), 741-748 |x 0033-8230 |q 92:9-11/2004<741 |1 2004 |2 92 |o ract | |
| 856 | 4 | 0 | |u https://doi.org/10.1524/ract.92.9.741.55006 |q text/html |z Onlinezugriff via DOI |
| 908 | |D 1 |a research article |2 jats | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1524/ract.92.9.741.55006 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Ozaki |D Takuo |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Gillow |D J. B. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Kimura |D Takaumi |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Ohnuki |D T. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Yoshida |D Zenko |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Francis |D Arokiasamy J. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Radiochimica Acta/International journal for chemical aspects of nuclear science and technology |d Oldenbourg Wissenschaftsverlag GmbH |g 92/9-11/2004(2004-11-01), 741-748 |x 0033-8230 |q 92:9-11/2004<741 |1 2004 |2 92 |o ract | ||
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| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-gruyter | ||