Am的胶体行为研究  

Colloidal Behavior of Americium

作　　者：贯鸿志[1] 周舵[1] 龙浩骑[1] 姚军[1] 王波[1] 姜涛[1] 宋志鑫[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2011年第2期84-88,共5页Journal of Nuclear and Radiochemistry

摘　　要：研究了低氧条件下去离子水、北山地下水、超滤地下水三种不同体系中Am的胶体行为。考察了pH值、离子强度、初始浓度等因素对Am胶体行为的影响。结果表明,实验范围（pH=6~9）内,pH的升高使Am胶体的含量增加;离子强度对Am胶体行为有显著影响;Am初始浓度远小于溶解度时,其对Am胶体行为影响不显著;研究还发现地下水中存在的天然胶体、阴离子都会对Am的胶体行为产生重要影响;并用PHREEQC计算了实验条件下Am溶解度控制相的饱和指数,用于实验结果的讨论。The formation of Am colloid in deionized water,Beishan groundwater,and ultrafiltrated groundwater was studied and the influence of pH,ionic strength,and americium initial concentration on the colloidal behavior of Am was investigated under anoxic condition in this paper.Experimental results indicate that formation of Am colloid is influenced strongly by pH and ionic strength.The amount of Am colloid increases with the increase of pH value（pH=6-9）.The original concentration of Am has no significant effect on the formation of americium colloid if it is far lower than the solubility of Am,while the natural colloid and anions existing in groundwater can strongly affect the colloidal behavior of Am.The saturation indices of the solid phase which controlled Am solubility under different experiment conditions were calculated and used in the discussion of the experiment results.

关 键 词：AM 胶体行为 地下水 PHREEQC 

分 类 号：O615.1[理学—无机化学]