钚在地下水中的存在形式及影响因素分析

摘要

The existing forms of plutonium in groundwater from a drilling hole in a study region was simulated by the geochemical modeling program PHREEQC. The main conclusions are as follows: the main existing form of plutonium in the groundwater is Pu (Ⅳ ) in Pu (CO3 )2 (OH)22- which take up 82. 28%, the subordination chemical form is Pu (V) as PuO2+, PuO2CO3- and Pu ( Ⅵ) as PuO2 (CO3)22- which take up 8. 52% , 7. 82% and 1. 17% respectively. In additon, the influence of pH and pE value on the existing forms of plutonium was also studied and it was found that pH and pE value have different impacts on the chemical form of plutonium.%运用PHREEQC模拟软件对西北某区钻孔地下水中钚的存在形式进行了模拟计算,结果显示,钚以Pu(Ⅳ)价态的Pu (CO3)2(OH)22-为主,占82.28％；其次为Pu (Ⅴ)价态的PuO2+、PuO2CO3-和Pu(Ⅵ)价态的PuO2 (CO3)22-,分别占8.52％、7.82％和1.17％.同时研究了pH值和pE值对钚在地下水中存在形式的影响.