The efficient treatment of radioactive wastes arising from nuclear accidents and overuse of radioisotopes has become an important issue and much efforts have been made to protect environment from such toxic radioactive materials. Among them, radioactive iodine in water is regarded as one of the most palpable threat to human as it is generated by post-use of medical and industrial applications. Although a few adsorbents and purification processes have been reported, developing a better desalination method which is able to provide high removal efficiency, ion-selectivity, and reusability is still demanded. Herein, we report the hybrid composite membrane, composed of gold nanoparticles and cellulose acetate membranes, which has potential to be used for efficient desalination of radioactive iodine. A single filtration process using this membrane provided high removal efficiency with more than two orders of magnitude within a minute and excellent ion-selectivity in iodide anion removal. Moreover, the same operation can be applied several times without significant decrease of its performance. Therefore, it is anticipated that our work will be a new avenue on desalination process of radioactive iodine in various aqueous media.

中文翻译：

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使用工程化的纳米复合膜有效而选择性地去除放射性碘阴离子

核事故和放射性同位素的过度使用引起的放射性废物的有效处理已成为一个重要问题，并且已经做出了很多努力来保护环境免受此类有毒放射性物质的侵害。其中，水中的放射性碘被认为是对人体的最明显威胁，因为它是由医疗和工业应用的后期使用产生的。尽管已经报道了一些吸附剂和纯化方法，但是仍然需要开发一种能够提供高去除效率，离子选择性和可重复使用性的更好的脱盐方法。本文中，我们报道了由金纳米颗粒和醋酸纤维素膜组成的混合复合膜，它具有用于放射性碘有效脱盐的潜力。使用该膜的单次过滤过程可在一分钟内提供超过两个数量级的高去除效率，并且在去除碘化物阴离子方面具有出色的离子选择性。而且，同一操作可以应用几次，而不会显着降低其性能。因此，可以预见，我们的工作将成为各种水性介质中放射性碘脱盐工艺的新途径。