TY - JOUR
T1 - Biosorption of rare earth elements by Escherichia coli
AU - Hosomomi, Yukiho
AU - Baba, Yuzo
AU - Kubota, Fukiko
AU - Kamiya, Noriho
AU - Goto, Masahiro
PY - 2013
Y1 - 2013
N2 - Biosorption, which takes place by passive metal-sequestering, has recently attracted attention as an alternative to conventional separation processes such as precipitation and solvent extraction. In this work, the adsorption behavior of rare earth elements (REEs) onto an Escherichia coli (E. coli) bacterial adsorbent was examined. The adsorption of REEs increased with increasing pH of the feed solution. Also, E. coli showed a higher selectivity for heavier REEs, especially for scandium. To elucidate the adsorption mechanism, the functional groups on the E. coli were chemically modified. By analyzing the adsorption behavior and FT-IR spectra of these E. coli samples before and after adsorption, it was confirmed that REEs are adsorbed at phosphate and carboxyl groups on the surface of E. coli. It is concluded that E. coli is a potential novel adsorbent for REEs.
AB - Biosorption, which takes place by passive metal-sequestering, has recently attracted attention as an alternative to conventional separation processes such as precipitation and solvent extraction. In this work, the adsorption behavior of rare earth elements (REEs) onto an Escherichia coli (E. coli) bacterial adsorbent was examined. The adsorption of REEs increased with increasing pH of the feed solution. Also, E. coli showed a higher selectivity for heavier REEs, especially for scandium. To elucidate the adsorption mechanism, the functional groups on the E. coli were chemically modified. By analyzing the adsorption behavior and FT-IR spectra of these E. coli samples before and after adsorption, it was confirmed that REEs are adsorbed at phosphate and carboxyl groups on the surface of E. coli. It is concluded that E. coli is a potential novel adsorbent for REEs.
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U2 - 10.1252/jcej.13we031
DO - 10.1252/jcej.13we031
M3 - Article
AN - SCOPUS:84880753320
VL - 46
SP - 450
EP - 454
JO - Journal of Chemical Engineering of Japan
JF - Journal of Chemical Engineering of Japan
SN - 0021-9592
IS - 7
ER -