摘要
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120 min;当溶液pH为2.5~5.02、39Pu溶液初始活度浓度为21.5 kBq/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2 mL/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。
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 Sargassurn 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 times 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.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2009年第6期505-508,共4页
Atomic Energy Science and Technology
关键词
钚
马尾藻
固定化
生物吸附
^239Pu
Sargassum fusiforme
immobilization
biosorption
