Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Kozai, Naofumi; Onuki, Toshihiko; Komarneni, S.*
Journal of Materials Chemistry, 17(12), p.2993 - 2996, 2002/12
Here we report the extremely high and selective uptake of selenium oxyanions by a novel exchanger, NiZn
(OH)
(OCOCH
)
・nH
O that has brucite-type hydroxide layers with OCOCH
anions in the interlayers. This Ni-Zn basic salt exhibited very high selectivity for Se(IV) (Kd = 9.0x10
ml/g with an initial Se(IV) concentration of 1x10
M) in the presence of 0.1M Cl
solution while the well known anionic clay, Mg
Al(OH)
NO
・nH
O showed a Kd of 6.0x10
ml/g under the same conditions. The uptake of Se(IV) on the Ni-Zn basic salt was found to be irreversible when treated with solutions containing 1N Cl
, 1N NO
, or 1N PO
, while the Se(IV) sorbed on anionic clay was easily desorbed in a 1M Cl
solution. This novel exchanger also showed high Kd (2.6
10
ml/g at an initial Se concentration of 1
10
M) for Se(VI) and therefore it is expected to be useful for decontamination and removal of selenium oxyanions from contaminated water.