2024-03-28T12:32:22Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00013337
2022-12-14T03:45:50Z
1309:1310
Adsorption of rare earth ions onto the cell walls of wild-type and lipoteichoic acid-defective strains of Bacillus subtilis
Moriwaki, Hiroshi
Koide, Remi
Yoshikawa, Ritsuko
Warabino, Yuya
Yamamoto, Hiroki
Rare earth ion
Bacillus subtilis 168
Lipoteichoic acid
Lipoteichoic acid-defective strain
Adsorbent
The aim of this study is to investigate the potential of cell walls of wild-type and lipoteichoic acid-defective strains of Bacillus subtilis 168 to adsorb rare earth ions. Freeze-dried cell powders prepared from both strains were used for the evaluation of adsorption ability for the rare earth ions, namely, La(III), Eu(III), and Tm(III). The rare earth ions were efficiently adsorbed onto powders of both wild-type strain (WT powder) and lipoteichoic acid-defective strain (a dagger LTA powder) at pH 3. The maximum adsorption capacities for Tm(III) by WT and a dagger LTA powders were 43 and 37 mg g(-1), respectively. Removal (in percent) of Tm(III), La(III), and Eu(III) from aqueous solution by WT powder was greater than by a dagger LTA powder. These results indicate that rare earth ions are adsorbed to functional groups, such as phosphate and carboxyl groups, of lipoteichoic acid. We observed coagulated a dagger LTA powder in the removal of rare earth ions (1-20 mg L-1) from aqueous solution. In contrast, sedimentation of WT powder did not occur under the same conditions. This unique feature of a dagger LTA powder may be caused by the difference of the distribution between lipoteichoic acid and wall teichoic acid. It appears that a dagger LTA powder is useful for removal of rare earth ions by adsorption, because aggregation allows for rapid separation of the adsorbent by filtration.
Article
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY. 97(8):3721-3728 (2013)
journal article
SPRINGER
2013-04
application/pdf
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
8
97
3721
3728
0175-7598
AA10503386
https://soar-ir.repo.nii.ac.jp/record/13337/files/Adsorption_rare_earth_ions_onto.pdf
eng
22684329
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?CMD=search&DB=pubmed&term=22684329
10.1007/s00253-012-4200-3
https://doi.org/10.1007/s00253-012-4200-3
The original publication is available at www.springerlink.com