Huge quantities of fly ash and bottom ash are generated from thermal power plants and it presents great concern for country, mainly due to the environmental effects. In this study, fly ashes and bottom ash were characterized from technical and radiological aspects. Health effect due to the activity of radionuclides ²²⁶Ra, ²³²Th and ⁴⁰K was estimated via radium equivalent activity (Raeq), external hazards index (H_ex), the external absorbed dose rate (D) and annual effective dose rate (EDR). The specific surface area (40.25 m^2 g−1), particle density (1.88 g cm⁻³) and LOI (23.49%) were typical for bottom ash. Siliceous fly ash contained 32% reactive silica. The annual effective dose rate for all ashes is ≤ 0.2 mSv y⁻¹. Both, fly ash and bottom ash present potential secondary raw materials to be used for building purposes as result of their technological and radiological assessment.

火力发电厂产生大量粉煤灰和底灰，引起国家高度关注，主要是对环境的影响。在这项研究中，飞灰和底灰从技术和放射学方面进行了表征。放射性核素²²⁶ Ra、  ²³² Th 和 ⁴⁰ K的活度对健康的影响 通过镭当量活度 (Raeq)、外部危害指数 (H _ex )、外部吸收剂量率 (D) 和年有效剂量率 (EDR)估算. 比表面积（40.25 m ^{2 g-1}），颗粒密度（1.88 g cm ^-3) 和 LOI (23.49%) 是底灰的典型值。含硅飞灰含有 32% 的活性二氧化硅。所有灰烬的年有效剂量率≤ 0.2 mSv y ^-1。由于其技术和放射学评估，粉煤灰和底灰都存在用于建筑目的的潜在二次原材料。