Study the Effect of Rice Husk Ash on Durability of Cemented Radioactive Waste Block | ||
| Egyptian Journal of Chemistry | ||
| Volume 66, Issue 12, December 2023, Pages 11-20 PDF (333 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2023.182097.7359 | ||
| Authors | ||
| yassmin farid dawood* 1; Mohamed Abdel Geleel2; amaal tawfik3; Nagwa Abd El-fattah Badawy4; amina elsisi5 | ||
| 1Master student, Nuclear fuel cycle department, Nuclear and radiation safety research center, Egyptian Atomic Energy Authority (EAEA), | ||
| 2prof of radiation chemistry,nuclear fuel cycle safety department, nuclear and radiation safety research center, Egyptian atomic energy authority | ||
| 3Pro. Of radiation physics, Nuclear fuel cycle department, Nuclear and radiation safety research center, Egyptian Atomic Energy Authority (EAEA) | ||
| 4prof of physical chemistry, Chemistry Department, Faculty of Science (girls), Al-Azhar University, Cairo, Egypt | ||
| 5Pro. Of physical chemistry, chemistry department, science faculty (girls), El Azhar university | ||
| Abstract | ||
| The aim of this work is to investigate the usage of rice husk ash in improving the properties of Portland cement which used in solidification of radioactive waste. Untreated and potassium Hydroxide (KOH)-treated rice husk ash loaded with Cobalt, Strontium and Cesium were fixed on ordinary Portland cement. In the present study, Cobalt, Strontium and Cesium ions were used instead of Cobalt, Strontium and Cesium isotopes because the chemical behavior of the metal ions is similar to radioisotopes. Mechanical properties, effect of temperature on the compressive strength and leaching behavior of the final solid waste block had been studied. The results obtained showed that the compressive strength increases by an increasing amount of additives added for untreated rice husk ash, but decreases for KOH treated rice husk ash blocks. Infrared analysis (IR) and Thermogravimetric analysis (TGA) were performed. Effect of contact time and initial concentration on the leaching process using distilled water and underground water as leachants had been investigated. The results showed the effective use of ordinary Portland cement in solidifying and stabilizing radioactive waste and using rice husk ash as substitution cementing material is effective in enhancing the properties of cemented radioactive waste matrices. | ||
| Keywords | ||
| Portland cement; Radioactive waste; Rice Husk ash; Compressive strength; Leaching | ||
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