Cs的实验室建模,Sr,U,Upa河的浮游植物固定Pu,切尔诺贝利事故后受到影响,已经进行了。由于生物地球化学过程,选择某些条件将放射性核素牢固地固定在底部沉积物中。通过沉淀从水相中去除放射性核素的过程是基于浮游植物对放射性核素的积累,受到氮源和磷源的刺激。经过八天的刺激,浮游光养生物量,以浮游生物属的蓝细菌为主,出现在水样中。美国的有效性,在一个月内观察到Pu和Sr通过转移到底部沉积物而纯化。添加硫酸铵和磷酸盐(氨磷)导致脱硫杆菌属的硫酸盐和铁还原细菌的活化,脱硫带,Desulfosporomusa,Desulfosporosinus,热脱硫,硫单胞菌,硫杆菌,Sulfuritalea,假单胞菌,形成硫化亚铁沉淀物,如黄铁矿,纤锌矿,水提拉岩,等。,在厌氧底部沉积物中。通过热力学模型验证了在实验室条件下获得的沉积物的生物矿物组成。
Laboratory modeling of Cs, Sr, U, Pu immobilization by phytoplankton of the river Upa, affected after the Chernobyl accident, has been carried out. Certain conditions are selected for strong fixation of radionuclides in bottom sediments due to biogeochemical processes. The process of radionuclide removal from the water phase via precipitation was based on their accumulation by phytoplankton, stimulated by nitrogen and phosphorus sources. After eight days of stimulation, planktonic phototrophic biomass, dominated by cyanobacteria of the genus Planktothrix, appears in the water sample. The effectiveness of U, Pu and Sr purification via their transfer to bottom sediment was observed within one month. The addition of ammonium sulfate and phosphate (Ammophos) led to the activation of sulfate- and iron-reducing bacteria of the genera Desulfobacterota, Desulfotomaculum, Desulfosporomusa, Desulfosporosinus, Thermodesulfobium, Thiomonas, Thiobacillus, Sulfuritallea, Pseudomonas, which form sulphide ferrous precipitates such as pyrite, wurtzite, hydrotroillite, etc., in anaerobic bottom sediments. The biogenic mineral composition of the sediments obtained under laboratory conditions was verified via thermodynamic modeling.