KETAHANAN GELAS-LIMBAH AKTIVITAS TINGGI HASIL VITRIFIKASI MENGGUNAKAN BOTTOM ASH SEBAGAI GLASSFRITS

*Ratna Budiarti -  , Indonesia
Purwanto Purwanto -  , Indonesia
Herlan Martono -  , Indonesia
Published: 1 Mar 2012.
Open Access
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Section: Review Article
Language: EN
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Abstract

Vitrification is considered  as the most appropriate technology for HLW treatment.  However, it has constraints, those are processability, economic, and durability. The purposes of  this study are to examine the composition of materials using bottom ash  as an alternative glassfrits for vitrification, to
assess waste glass durability of selected glassfrits and analyze the economic advantage of bottom ash utilization as glassfrits.
This research was conducted with simulated High Level Waste. Glass–waste was melted at its melting point. Glasses  used in the study were borosilicate glass, bottom ash glass, and bottom ash glass added  B2O3.  Parameters  used  for  selected  glassfrits  are  melting  temperature,  leaching  rate

compressive strength and cost analysis. Selected glassfrits was analyzed using XRD and performed tests to determine the effect of pH on leaching rate. The results indicated that the addition of B2O3 in glass bottom ash reduced the melting temperature. This glass has a density of 2.78 g/cm3 , leaching rate of 6.99 x 10-7. Utilization of  bottom ash as a glassfrits can save 75, 34% of cost. The results of XRD analysis explained that the devitrification formed  a crystalline of Ca-Fe-Al-S-Si-O, Fe+2Fe2 O4+3, Ca-Mg-Fe-Ti-AlSiO. the influence of pH on the leaching rate showed that the highest leaching rate was at acidic condition Keywords: vitrification, chemical durability, mechanical durability, bottom ash

Keywords
vitrification, chemical durability, mechanical durability, bottom ash

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