TY - JOUR
T1 - Mechanisms Responsible for Adsorption of Molybdate ions on Alumina for the Production of Medical Radioisotopes
AU - Fujita, Yoshitaka
AU - Niizeki, Tomotake
AU - Fukumitsu, Nobuyoshi
AU - Ariga, Katsuhiko
AU - Yamauchi, Yusuke
AU - Malgras, Victor
AU - Kaneti, Yusuf Valentino
AU - Liu, Chia Hung
AU - Hatano, Kentaro
AU - Suematsu, Hisayuki
AU - Suzuki, Tatsuya
AU - Tsuchiya, Kunihiko
N1 - Funding Information:
This work was supported by Grant-in-Aid from the Ministry of Education, Science, Sports and Culture of Japan (17H04256) and the JST-ERATO Yamauchi Materials Space-Tectonics Project (JPMJER2003). This work was performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australia’s researchers.
Publisher Copyright:
© 2022 The Chemical Society of Japan.
PY - 2022
Y1 - 2022
N2 - In this work, the mechanisms responsible for the adsorption of molybdate ions on alumina are investigated using in-depth surface analyses of alumina specimens immersed in solutions containing different molybdate ions at different pH values. The obtained results reveal that when alumina is immersed in an acidic solution containing molybdate ions, the hydroxyl groups present on the surface are removed to generate positively charged sites, and molybdate ions (MoO42- or AlMo6O24H63-) are adsorbed via an electrostatic interaction. Alumina dissolves slightly in an acidic solution to form AlMo6O24H63-, which is more easily desorbed than MoO42-. Furthermore, the enhancement in the Mo adsorption or desorption property may be achieved by enriching the surface of the alumina adsorbent with many OH groups and optimizing Mo solution to adsorb molybdate ions on alumina as MoO42- ions. These findings will assist researchers in engineering more efficient and stable alumina-based adsorbents for molybdenum adsorption used in medical radioisotope (99Mo/99mTc) generators.
AB - In this work, the mechanisms responsible for the adsorption of molybdate ions on alumina are investigated using in-depth surface analyses of alumina specimens immersed in solutions containing different molybdate ions at different pH values. The obtained results reveal that when alumina is immersed in an acidic solution containing molybdate ions, the hydroxyl groups present on the surface are removed to generate positively charged sites, and molybdate ions (MoO42- or AlMo6O24H63-) are adsorbed via an electrostatic interaction. Alumina dissolves slightly in an acidic solution to form AlMo6O24H63-, which is more easily desorbed than MoO42-. Furthermore, the enhancement in the Mo adsorption or desorption property may be achieved by enriching the surface of the alumina adsorbent with many OH groups and optimizing Mo solution to adsorb molybdate ions on alumina as MoO42- ions. These findings will assist researchers in engineering more efficient and stable alumina-based adsorbents for molybdenum adsorption used in medical radioisotope (99Mo/99mTc) generators.
KW - Adsorption mechanisms
KW - Alumina
KW - Metal ion adsorption
UR - http://www.scopus.com/inward/record.url?scp=85126327775&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85126327775&partnerID=8YFLogxK
U2 - 10.1246/bcsj.20210249
DO - 10.1246/bcsj.20210249
M3 - Article
AN - SCOPUS:85126327775
SN - 0009-2673
VL - 95
SP - 129
EP - 137
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
IS - 1
ER -