A novel vanadosilicate with hexadeca-coordinated Cs(+) ions as a highly effective Cs(+) remover.
The effective removal of (137) Cs(+)  ions from contaminated groundwater and seawater and from radioactive nuclear waste solutions is crucial for public health and for the continuous operation of nuclear power plants. Various (137) Cs(+)  removers have been developed, but more effective (137) Cs(+)  removers are still needed. A novel microporous vanadosilicate with mixed-valence vanadium (V(4+) and V(5+) ) ions is now reported, which shows an excellent ability for Cs(+)  capture and immobilization from groundwater, seawater, and nuclear waste solutions. This material is superior to other known materials in terms of selectivity, capacity, and kinetics, and at very low Cs(+)  concentrations, it was found to be the most effective material for the removal of radioactive Cs(+)  ions under the test conditions. This novel vanadosilicate also contains hexadeca-coordinated Cs(+)  ions, which corresponds to the highest coordination number ever described.
Korea Center for Artificial Photosynthesis, Center for Nanomaterials, Department of Chemistry, Sogang University, Seoul 121-742 (Korea).
Shuvo Jit
SJ
Datta
Won Kyung
WK
Moon
Do Young
DY
Choi
In Chul
IC
Hwang
Kyung Byung
KB
Yoon
cesium; coordination modes; microporous materials; radioactive ions; vanadosilicate