粘土、硅藻土、聚乙烯瓶和玻璃瓶对碘的吸附行为

SORPTION BEHAVIOR OF IODINE ON CLAY,KIESEL- GUHR AND THE SURFACE OF POLYETHYLENE AND GLASS VESSELS

本文以Na^(125)I为示踪剂,在模拟地下水介质条件下研究了粘土和硅藻土对长寿命裂变产物^(129)I(T_(1/2)=1.57×10~7a)的吸附规律。实验发现,在pH6—7的地下水介质中,粘土和硅藻土对I^-的吸附服从Freundlich等温吸附经验公式,但吸附百分率较小(≤5％)。 对无载体^(125)I在实验用聚乙烯瓶和玻璃瓶上的吸附研究表明,碘的氧化态(I_3^-或IO_3^((?))要比I^-更易被吸附。

The sorption of the long-lived fission product 129I on clay and kieselguhr in the simulated underground water was investigated by taking Na125I as tracer. Results was shown that sorption of I- on clay and kieselguhr in the simulated underground water with 6-7 pK followed the Freundlich sorption law,the percent ratio of sorption was low≤5%).The sorption of the carrier-free 125I on the surface of polyethylene and glass vessels demonstrated that IO3- was sorbed easily than I-.