Bentonit-Pasir Kuarsa sebagai Kandidat Bahan Urug pada Penyimpanan Limbah Radioaktif
ABSTRACT: An investigation of
the contribution of quartz sand in the bentonite mixture as the backfill
materials on the shallow land burial of radioactive waste has been done. The
experiment objective is to determine the effect of quartz sand in a bentonite
mixture with bentonite particle sizes of -20+40, -40+60, and -60+80 mesh on the
retardation factor and the uranium dispersion in the simulation of uranium
migration in the backfill materials. The experiment was carried out by the
fixed bed method in the column filled by the bentonite mixture with a
bentonite-to-quartz sand weight percent ratio of 0/100, 25/75, 50/50, 75/25,
and 100/0 on the water saturated condition flown by uranyl nitrate solution at
concentration (Co) of 500 ppm. The concentration of uranium in the effluents in
interval 15 minutes represented as Ct was analyzed by spectrophotometer, then
using Co and Ct, retardation factor (R) and dispersivity () were determined.
The experiment data showed that the bentonite of -60+80 mesh and the quartz
sand of -20+40 mesh on bentonite-to-quartz sand with weight percent ratio of
50/50 gave the highest retardation factor and dispersivity of 18.37 and 0.0363
cm, respectively.
Penulis: Raharjo
Kode Jurnal: jpkimiadd050027
