卤化银添加剂对^(125)Ⅰ在北山花岗岩岩粉中的吸附作用研究  

Influence of Silver Halide Additives on the Sorption of Iodine-125 on Beishan Granite Powder

作　　者：陈涛[1] 田文宇[1] 孙茂[1] 黎春[1] 刘晓宇[1] 王路化[1] 王祥云[1] 刘春立[1] 

机构地区：[1]北京分子科学国家实验室,北京大学化学与分子工程学院应用化学系,北京100871

出　　处：《无机化学学报》2009年第5期761-766,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20471005,10775008);教育部博士点基金(No.20060001032);国防科工委军工遗留专项基金(No.科工计[2007]840)资助项目

摘　　要：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 influence of silver halide additives （AgCl, AgBr, AgI） on the sorption of ^125I on Beishan Granite powder was studied by column and batch sorption methods. The results indicate that silver halide additives could enhance the sorption of ^125I on Beishan Granite powder with effective distribution coefficients （Kd,e） greater than 1.0×10^3mL·g^-1. When isotopic carrier of ^125I is added, silver chloride and silver bromide still enhance the sorption of ^125I on Beishan Granite Powder with Kd,e values greater than 1.0×10^3mL·g^-1. Among the three, silver bromide has the highest power in enhancing the sorption of ^125I on the granite powder, which may due to its crystal structure and photolysis ability.

关 键 词：卤化银 添加剂 北山花岗岩 125I 高放废物地质处置 

分 类 号：O613.44[理学—无机化学] O615.11[理学—化学]