摘要
采用阶梯法和脉冲法分别将腐殖酸和2 37Np注入石英砂柱中 ,研究了腐殖酸存在时对2 37Np迁移的影响。实验表明 ,在流量为 0 .0 8mL/min的情况下 ,腐殖酸浓度从 0增大至 1 0mg/L时 ,2 37Np在石英砂柱中的迁移加快 ,浓度继续升高到 2 0mg/L、5 0mg/L后未见显著变化 ;2 37Np在石英砂柱中的滞留因腐殖酸的存在而有减轻趋势 (从无腐殖酸时的 8.3 %到HA为 5 0mg/L时的 5 .0 % )。滞留在石英砂柱中的2 37Np ,除了与吸附在石英砂上的腐殖酸结合外 。
The migration of ()^(237)Np was investigated in quartz packed columns with existance of humic acid. Mobility of ()^(237)Np was found to increase as the concentration of humic acid was increased from 0 to 10 mg/L, which seemed to keep steady with higher concentrations (20, 50 mg/L). Retention of ()^(237)Np in quartz packed columns decresed with the existance of humic acid 〔Retention fraction decreased from 8.3%(without HA) to 5.0%(50mg/L HA)〕.There were at least two species of ()^(237)Np retained in quartz columns, apart from those binding with humic acid sorbed on quartz. (
出处
《辐射防护》
CAS
CSCD
北大核心
2004年第6期383-387,402,共6页
Radiation Protection
