International Journal of Environmental Research ( IF 2.6 ) Pub Date : 2021-02-22 , DOI: 10.1007/s41742-021-00324-2 Takashi Asada , Naoyuki Sato , Takumi Ozeki , Aoi Ito , Tsugiko Takase
Biochar-immobilized potassium nickel hexacyanoferrate (KNiFC) as a sorbent for removal of radioactive cesium (Cs) from aqueous solutions was prepared using a novel method. Japanese cedar sawdust loaded with NiSO4 using a ball mill was carbonized at various temperatures. The resultant Ni-loaded biochar was immersed in a K4[Fe(CN)6]·3H2O solution, and biochar-immobilized KNiFC was obtained. For comparison, Ni-loaded biochar was also prepared using the impregnation method. The loading of Ni using the ball mill resulted in a higher Ni amount in the biochar compared with the impregnation method. The carbonization at 400 °C was suitable for Cs adsorption on biochar and synthesis of KNiFC. Consequently, KNiFC immobilization on biochar improved the Cs sorption performance in aqueous solutions with Na+, K+, Ca2+, Mg2+, and Cs+. The sorption performance was selective in aqueous solutions with radioactive Cs and other cations of high concentration.
中文翻译:
使用球磨机制备的生物炭固定化六氰基高铁酸钾从水溶液中去除放射性Cs
使用一种新颖的方法,制备了固定有生物炭的六氰合铁酸钾镍(KNiFC)作为吸附剂,用于从水溶液中去除放射性铯(Cs)。使用球磨机将装有NiSO 4的日本雪松木屑在各种温度下碳化。将所得的载有Ni的生物炭浸入K 4 [Fe(CN)6 ]·3H 2中在溶液中,获得了固定有生物炭的KNiFC。为了比较,还使用浸渍方法制备了载有Ni的生物炭。与浸渍法相比,使用球磨机加载的镍导致生物炭中的镍含量更高。400°C的碳化适合于Cs在生物炭上的吸附和KNiFC的合成。因此,固定在生物炭上的KNiFC改善了Na +,K +,Ca 2 +,Mg 2+和Cs +的水溶液中Cs的吸附性能。在具有放射性Cs和其他高浓度阳离子的水溶液中,吸附性能具有选择性。