摘要
采用批示法(BATCH)研究不同浓度条件下87Sr在某放射性废物预选处置场围岩—花岗岩和砂岩中的吸附比,并利用面积修正公式求取分配系数。花岗岩和砂岩对87Sr的吸附机制研究结果表明:花岗岩和砂岩对87Sr的吸附机制为岩石中的Ca和K与水中的Sr之间的离子交换。由于砂岩中长石含量大,且胶结物质为钙质和泥质,因此砂岩对87Sr的吸附能力比花岗岩强。
Absorption ratio represents the distributing concentration ratio of a solute between solid phase and liquid phase.With Batch way, this paper mainly studies ()^(87)Sr absorption ratio in granite and sandstone which are the bedrocks in some radioactive waste disposal field in China and the absorption ratio change with ()^(87)Sr concentrations in water.The distribution coefficient with area revision formula for ()^(87)Sr in granite and sandstone and their absorption mechanism are calculated and analyzed.The result indicates that the absorption mechanism of granite and sandstone absorbing ()^(87)Sr is the ionic exchanges between ()^(87)Sr in water and Ca and K in granite and sandstone.As there is more feldspar in sandstone than in granite ,and the cement in sandstone is calcareous and mud, so the ability of ()^(87)Sr absorption of sandstone is stronger than that of granite.
出处
《矿物岩石》
CAS
CSCD
北大核心
2004年第2期30-34,共5页
Mineralogy and Petrology
