Colloids in groundwater or geological barriers generally play a key role in the migration of special nuclides. Adsorption characteristics of strontium were investigated on porous media in the presence of colloidal Fe(OH)₃ from the Beishan Site, the only high-level radioactive waste disposal site candidate in China. The effects of colloid amounts, solid contents, and pH were determined and studied by batch texts. The results revealed that the presence of colloidal Fe(OH)₃ in porous media contributed to promotion of the sorption effect, and the influencing factors had a significant impact on the adsorption process. The sorption ability increased with increasing colloid amount when the equilibrium time was approximately 10 h under an optimal solid-liquid ratio of 20 g L⁻¹. The sorption effect in alkaline conditions was better than that under acidic conditions. The sorption kinetics indicated that the strong chemical interaction and/or surface complexation contributed primarily to strontium sorption. The sorption isotherms and model fitting revealed that the sorption of strontium onto porous media in the presence of colloidal Fe(OH)₃ was a monolayer adsorption, and the presence of colloidal Fe(OH)₃ is an important factor that greatly influences the removal of strontium from aqueous solutions. These findings provide useful information for the treatment of strontium in radioactive waste disposal sites.

地下水或地质屏障中的胶体通常在特殊核素的迁移中起关键作用。在存在唯一的高放废物处置场所的北山遗址中，在胶态Fe（OH）₃存在下，研究了多孔介质上锶的吸附特性。通过批处理文本确定和研究胶体数量，固体含量和pH的影响。结果表明，多孔介质中胶体Fe（OH）₃的存在促进了吸附作用的提高，其影响因素对吸附过程具有重要影响。当最佳固液比为20 g L ^-1时，平衡时间约为10 h，吸附能力随胶体量的增加而增加。。碱性条件下的吸附效果好于酸性条件下的吸附效果。吸附动力学表明强的化学相互作用和/或表面络合主要是锶的吸附。吸附等温线和模型拟合表明，在胶体Fe（OH）₃存在下锶在多孔介质上的吸附是单层吸附，而胶体Fe（OH）₃的存在是一个重要的因素，极大地影响了Fe（OH）₃的去除。水溶液中的锶。这些发现为放射性废物处置场中锶的处理提供了有用的信息。