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采用磷酸镁水泥(Magnesium phosphate cement,MPC)对核素Sr2+、Cs+进行固化,对固化体中Sr2+、Cs+的浸出性能进行了研究,并根据Fick第二定律建立了适用于磷酸镁体系的Sr2+、Cs+迁移模型,对核素Sr2+、Cs+在磷酸镁水泥固化体中的迁移进行预测。结果表明,磷酸镁水泥可以有效固化Sr和Cs,使核素Sr2+、Cs+在磷酸镁水泥固化体中浸出率较低;建立的一维衰变浸出模型可以有效地预测核素Sr2+、Cs+在磷酸镁水泥固化体中的迁移规律。
Magnesium phosphate cement (MPC) was used to solidify the radionuclides Sr2 + and Cs +, and the leaching performance of Sr2 + and Cs + in the solidified material was studied. According to Fick’s second law, Sr2 + Cs + migration model to predict the migration of Sr2 + and Cs + in the solid magnesium phosphate cement. The results show that magnesium phosphate cement can effectively solidify Sr and Cs so that the leaching rate of Sr2 + and Cs + in magnesium phosphate cement solidified body is low. The established one-dimensional decay leaching model can effectively predict the radionuclides Sr2 + and Cs + Migration of cement solidification body.