In power plants biomass combustion produces large quantities of biomass bottom ash wastes. During the combustion process, the produced ashes are enriched in the radionuclides. The different enrichment of the various radionuclides within a radioactive series, such as that of ²²⁶Ra, ²²⁸Ra, ²²⁸Th, ⁴⁰K, ²¹⁰Pb and ¹³⁷Cs results in the disturbance of radioactive secular equilibrium. The production of energy from renewable resources, such as biomass, is increasing rapidly. As the demand for bioenergy production increases, waste products from biomass combustion will increase too and will become a relevant environmental and economic problem. Therefore, environmentally friendly, and economic solutions to recycle the resulting by-products are essential. This research provides a real opportunity to save cement thus disposing the waste by using zeolitized biomass bottom ash as supplementary cementitious materials. The zeolitized products were examined by X-ray diffraction (XRD), X-ray fluorescence spectrometer (XRF) spectroscopy and high-resolution gamma spectrometry. In all investigated cases, compressive strength in hardened cement pastes and concrete samples slightly increases by replacing from 3% to 5% of Portland cement with zeolitized ashes. The results showed that natural radionuclides as ²²⁶Ra, ²²⁸Ra, ²²⁸Th, ⁴⁰K are concentrated in similar way as in case of ashes obtained from combustion. However, addition of biomass leads to concentration of artificial radionuclide ¹³⁷Cs that is still commonly present in biomass due to Chernobyl disaster. The observed activity concentration of ¹³⁷Cs reaches the level of natural radionuclides concentration. Taking into consideration the contribution of ¹³⁷Cs to gamma dose (usage of expanded activity index formula) may lead to exceeding the value of 1 in some cases. Calculated differences between activity indexes reach 13%.

在发电厂中，生物质燃烧产生大量的生物质底灰废物。在燃烧过程中，产生的骨灰富含放射性核素。放射性系列中各种放射性核素的不同富集，例如²²⁶ Ra，²²⁸ Ra，²²⁸ Th，⁴⁰ K，²¹⁰ Pb和^137的富集Cs导致放射性长期平衡的扰动。由可再生资源（例如生物质）生产的能源正在迅速增长。随着对生物能源生产的需求增加，来自生物质燃烧的废物也将增加，并且将成为相关的环境和经济问题。因此，循环利用所产生的副产物的环保和经济解决方案至关重要。这项研究提供了一个真正的机会来节省水泥，从而通过使用沸石化的生物质底灰作为辅助胶结材料来处理废物。通过X射线衍射（XRD），X射线荧光光谱仪（XRF）光谱和高分辨率伽马光谱法检查了沸石产品。在所有调查的案例中，通过用沸石灰代替3％至5％的波特兰水泥，硬化水泥浆和混凝土样品的抗压强度会略有提高。结果表明，天然放射性核素为²²⁶ Ra，²²⁸ Ra，²²⁸ Th，⁴⁰ K的浓缩与燃烧产生的灰分相似。但是，由于切尔诺贝利灾难，生物质的添加导致人工放射性核素¹³⁷ Cs的浓度仍然普遍存在于生物质中。观测到的¹³⁷ Cs的活动浓度达到了天然放射性核素的浓度水平。考虑到¹³⁷ Cs对伽马剂量的贡献（使用扩展的活性指数公式）在某些情况下可能导致超过1的值。活动指标之间的计算差异达到13％。