少根根霉吸附^(241)Am的研究

BIOSORPTION OF ^(241)Am BY R. ARRIHIZUS

研究了各种实验条件对少根根霉吸附2 41Am的影响。结果表明 :常温下 ,当2 41Am起始浓度为 5 .6～ 111MBq/L ,pH =1～ 3,干少根根霉与水相体积比为 1.3g/L时 ,吸附量为 4 .2～ 79.4MBq/g ,吸附率达 99%左右 ,吸附在 1h左右达到平衡。反应温度在 10～ 4 5℃之间变化对吸附影响不大。pH =1～ 3时 ,吸附率最大。干少根根霉与水相体积比为 0 .2～ 2 .5 g/L时 ,对吸附率影响不大。2 41Am液相浓度与吸附量符合Freundlich经验公式。 2 0 0 0多倍的金、银存在时 。

The biosorption of radionuclide 241 Am on R.arrihizus from aqueous solution and the effects of the experimental conditions on the biosorption are investigated by the batch technique. The experimental results show that the R.arrihizus is a very efficient sorbent. The biosorption reaches equilibration in 1 h , the optimum pH range is 1～3. No significant temperature effect on 241 Am biosorption is observed in the range of 10～45 ℃. No significant differences of biosorption in the presence and absence of Au 3+ or Ag +are observed. The relationship between concentrations of 241 Am in aqueous solutions and adsorption capacities of 241 Am can be described by the Freundlich adsorption equation.