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利用柱法实验和批次实验研究了卤化银(AgCl、AgBr、AgI)对125I在甘肃北山花岗岩中的吸附现象。结果表明在无载体的情况下,卤化银添加剂有利于125I在北山花岗岩岩粉中的吸附,有效分配系数(Kd,e)均大于1.0×103 mL.g-1。在有载体的情况下,氯化银和溴化银仍然对125I在北山花岗岩岩粉中有良好的吸附作用,Kd,e大于1.0×103 mL.g-1。其中,溴化银的吸附效果最好,这可能与其晶体结构和光解性质有关。
The adsorption of 125I on Beishan granite in Gansu Province was studied by using columnar and batch experiments with silver halide (AgCl, AgBr, AgI). The results show that the silver halide additive is favorable for the adsorption of 125I in Beishan granite rock powder in the absence of carrier, and the effective partition coefficient (Kd, e) is greater than 1.0 × 103 mL.g-1. In the presence of a carrier, silver chloride and silver bromide still adsorbed 125I in Beishan granite rock powder with Kd, e greater than 1.0 × 103 mL.g-1. Among them, silver bromide has the best adsorption effect, which may be related to its crystal structure and photolysis properties.