腐殖酸胶体对超铀核素存在形态的影响研究

INFLUENCE OF HUMIC ACID COLLOID ON THE SPECIATION OF TRU NUCLIDES

摘要: 研究了在腐殖酸存在时,地下水中237Np,238Pu和241Am的存在形态以及在黄土上的吸附。研究结果表明,在地下水中存在腐殖酸时,237Np形成了假胶体,且胶体份额随腐殖酸浓度的增大而增大;238Pu和241Am的胶体份额也随腐殖酸浓度增大而增大。在地下水中存在腐殖酸时,这几种核素在黄土上吸附能力减弱。

Abstract: The colloid forming of transuranic nuclides in the loessial groundwater when humic acid exists and the influence of the presence of humic acid on the adsorption of these nuclides on loess are studied. The results show that when humic acid existed in the groundwater,237Np can form pseudocolloid,and the fraction of the colloid increase with the humic acid concentration;the situation for 238Pu and 241Am is the same.The results also indicate that the exist of humic acid weaken the adsorption of these nuclides on loess.