Sorption behaviour of Am on marl groundwater colloids

摘要

The sorption of americium on marl colloids is studied in a comprehensive way. In Na-HCO_3 groundwater conditions, americium in the concentration range 3×10~-11 -3×10~-10M sorbs onto groundwater colloids. In these tests, the colloid concentration is rather high, i.e. C_coll 7±1.3 mg~-1 for sizes 50-5000 nm or N_coll(1.7±0.1) ×10~111~-1 for sizes larger than 100 nm. These colloids are mainly chlorite and smectite/illite with an average size smaller than 500 nm.