^(241)Am在砂土中的存在形式研究  

Existing Form of ^(241)Am in Sandy Soil

作　　者：施燕梅[1] 王旭辉[1] 周国庆[1] 张海涛[1] 谢金川[1] 李梅[1] 王耀芹[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《原子能科学技术》2012年第3期263-267,共5页Atomic Energy Science and Technology

摘　　要：采用Tessier连续提取法,研究了某地区受放射性污染砂质土壤以及未受污染土壤中人工加入示踪剂后241 Am的存在形式。结果表明,两类土壤中241 Am的存在形式差异明显,原位放射性污染土壤中的241 Am均以残渣态这种优势态存在,核素能稳定存在于土壤中;而人工加入的外源示踪241 Am在相当长的一段时间内以碳酸盐结合态为主要存在形式,与土壤结合不稳固,迁移活性高,对环境具有潜在的威胁。The Tessier sequential extraction method was employed to study the existing form of Z41Am in sandy soil samples which were contaminated by radioactivity. In addi- tion, the process was also applied to the soil into which241Am was added purposely. The experimental results reveal that the associations of 241 Am in two kinds of soils are quite different from each other. In the radioactively contaminated soil, a significant pro- portion of 241 Am was associated with residual phase. It indicates that 241 Am in the soil has rather low possibility for migration. However, the 241 Am in simulant soil was main- ly associated with carbonate fraction for a long time after added into the soil. It indicates that 241Am in simulant soil has high possibility for migration.

关 键 词：241Am 连续提取 存在形式 

分 类 号：O614[理学—无机化学]