原子能科学技术2016，Vol.50Issue(2)：242-246,5.DOI:10.7538/yzk.2016.50.02.0242
Np在 Np-水-膨润土平衡体系中的形态及价态分布
Speciation and Valence of Np in Balanced System of Np-groundwater-bentonite
姜涛 1龙浩骑 1王波 1包良进 1周舵1
作者信息
- 1. 中国原子能科学研究院放射化学研究所，北京 102413
- 折叠
摘要
Abstract
The speciation and valence distributions and effect of pH on the speciation and valence distributions of Np in the balanced system of Np‐groundwater‐bentonite were studied by batch experiments and solvent extraction methods .The results indicate that the valence of Np in groundwater is penta‐valent state , and tetra‐ and penta‐valent states were obtained on bentonite .With the increase of pH ,the percentage of Np(Ⅴ ) in bentonite increases at first and then decreases at pH>9 .With the increase of CO2 -3 , the percentage of Np(Ⅴ) in bentonite decreases .The calculation results of PHREEQCI show that NpO2+ is the main speciation of Np at pH < 9 ,and NpO2 OH at pH > 9 . NpO2 (CO3 )3 -2 and NpO2 (CO3 )5 -3 are the main speciations of Np at high concentration CO2 -3 solution .The valence of Np is not affected by pH .关键词
Np/膨润土/形态/价态Key words
neptunium/bentonite/speciation/valence分类
化学化工引用本文复制引用
姜涛,龙浩骑,王波,包良进,周舵..Np在 Np-水-膨润土平衡体系中的形态及价态分布[J].原子能科学技术,2016,50(2):242-246,5.
