The caused environmental pollution problems by nuclear is very urgent, any country treats it with caution. Under existed technologies, geological disposal is recognized as the most effective methods. For security and efficient, the very low level radioactive waste (VLLW) is separated from the medium-low-level radioactive waste, and the design of the repository could meet the environmental requirements without very strict geological condition, however, the barrier material of the VLLW repository still is key to radioactive waste disposal. A candidate sites, which was for the disposal of VLLW in Southwestern China, were built in the terraces of alluvial valley. We focused on the multiple geological barrier system on the near-surface geological disposal. The multiple barrier technology is reflected at natural barriers (natural geological body) and engineering barriers (material). For the absorption of the barrier, batch tests and column experiments method were applied for the influencing factors and mechanism of adsorption.
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