Chemical species of Am in contaminated desert soil particles was investigated by using the standard sequential extraction procedures

so as to assess the mobility of Am in soil in nuclear accident.It was found that 19.5% 60% of Am was bound to reducible fraction.The content of 241Am bound to oxidisable and residual fraction increased with decreasing particle size.High correlations were found between the Am concentration and amount of organic

Illite

Fe2O3 matter in soil particles.The results showed that Am is difficult to migrate in this site.Organic and mineral matters play an important part for Am accumulation in soils.