固定化马尾藻生物吸附239Pu实验研究

采用藻酸钙作为载体对马尾藻生物吸附剂进行固定化处理，并通过静态和动态实验法对固定化马尾藻生物吸附剂吸附²³⁹Pu的特性进行研究。初步的实验结果表明：固定化马尾藻生物吸附剂对²³⁹Pu的吸附平衡时间为120min；当溶液pH为2.5～5.0、²³⁹Pu溶液初始活度浓度为21.5kBq/L时，固定化马尾藻生物吸附剂对239Pu的吸附率达99.2%以上；在动态实验中，流速控制在2mL/min，重复进行5次吸附-解吸实验后，吸附率仍达98.0%以上；固定化马尾藻生物吸附剂具有较好的化学稳定性和机械强度、费用低、吸附率高和可重复使用等特点，是一种较好的²³⁹Pu生物吸附剂。

Biosorption of 239pu by Immobilized Sargassum fusiforme

Sargassum fusiforme was immobilized with calcium alginates and its biosorption property to 239Pu was studied by batch and column methods. Biosorption equilibrium time of immobilized Sargassum fusiforme biosorbent to ²³⁹Pu is 120 min and biosorption efficiency is over 99.2% when the initial concentration of ²³⁹Pu is 21.5 kBq/L and pH is 2.5-5.0. After five repetition biosorption-desorption cycles biosorption efficiency is still over 98.0% when the velocity of flow is 2 mL/min in column experiment. Immobilized Sargassum fusiforme biosorbent is better to ²³⁹Pu due to its better chemical stability, mechanical strength, lower cost, high biosorption efficiency and repeated biosorption-desorption cycles.