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首页> 外文期刊>Separation and Purification Technology >Separation of Am(III) and trivalent lanthanides from simulated high-level wast using a hollow fiber-supported liquid membrane
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Separation of Am(III) and trivalent lanthanides from simulated high-level wast using a hollow fiber-supported liquid membrane

机译：使用中空纤维支撑液膜从模拟的高级废料中分离Am（III）和三价镧系元素

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摘要

Facilitated transport of actinides and lanthanides from nitrate medium has been investigated through a hollow fiber-supported liquid membrane using a mixture of N,N,N',N'-tetraoctyl diglycolamide (TODGA) and N,N-di-n-hexyl octanamide (DHOA) in normal paraffin hydrocarbon (NPH) as the carrier solvent. The influence of aqueous feed composition on the permeability of Am(III) is reported. Quantitative transport of Am(III) was observed in 45min from a feed solution containing 1g/L Nd at 3.5 M HNO3. Similarly, quantitative transport of Am(III) was also achieved in 30 min from a simulated high-level waste (SHLW) solution containing ～0.6 g/L total lanthanides. No significant transport of other metal ions present in SHLW was observed. Use of irradiated solvent suggested negligible change on the transport behaviour of Am(III). Hollow fiber-supported liquid membrane containing TODGA and DHOA in NPH appears promising for the separation of actinides from high-level waste.
机译：已研究了使用N，N，N'，N'-四辛基二甘醇酰胺（TODGA）和N，N-二-正己基辛酰胺的混合物通过中空纤维支撑的液膜从硝酸盐介质中促进a系元素和镧系元素运输的过程在正构烷烃（NPH）中作为（DHOA）的载体溶剂。报道了含水进料组成对Am（III）的渗透性的影响。从含有1g / L Nd的3.5 M HNO3的进料溶液中，在45分钟内观察到Am（III）的定量迁移。同样，还可以在30分钟内从模拟的高含量废液（总镧系元素含量约为0.6 g / L）实现Am（III）的定量运输。没有观察到SHLW中存在其他金属离子的显着迁移。使用辐照溶剂表明，Am（III）的运输行为变化可忽略不计。在NPH中包含TODGA和DHOA的中空纤维支撑液膜似乎有望从高放废物中分离act系元素。

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