We report the extremely high and selective uptake of selenium oxyanions by a novel anion exchanger, Ni1-xZn2x(OH)2(OCOCH3)2x · nH2O (0.15 < x < 0.25). The tested Ni-Zn basic salt (x = 0.24) exhibited very high selectivity for Se(IV) [Kd = 9.0 × 104 cm3/g with an initial Se(IV) concentration of 1 × 10-4M] in the presence of 0.1 M Cl- solution. The uptake of Se(IV) on the Ni-Zn basic salt was irreversible when treated with solutions containing 1 N Cl-, 1 N NO3-, or 1 N PO43-. This novel exchanger also showed high Kd (2.6 × 103 cm3/g) for Se(VI), and therefore it is expected to be useful for decontamination and removal of selenium oxyanions from contaminated water.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering