摘要：为研究珍珠岩粉体对含⁹⁰Sr放射性核废液的吸附性能,利用Sr(NO₃)₂配置一定浓度的模拟核废液,以不同粒度的珍珠岩粉体为吸附剂,进行珍珠岩对模拟核废液中Sr²⁺的吸附性能研究。利用X射线荧光光谱仪、扫描电子显微镜和原子吸收光谱对样品中的元素含量、微观形貌及对Sr²⁺的吸附行为进行表征。结果表明:溶液为中性条件下,珍珠岩粉体对Sr²⁺的处理是以快速吸附机制进行的;珍珠岩对Sr²⁺的去除效果与样品的粒度呈一致性关系,粒度在75～100μm范围的珍珠岩对于Sr²⁺的处理效果最好,5 min时对Sr²⁺的去除率即可达到89%以上。珍珠岩粉体适合于对含Sr²⁺中性放射性废液进行快速处理。

关键词： 珍珠岩；锶；放射性；废液处理

Abstract：In order to investigate the adsorptive power of radioactive nuclear waste liquid with perlite powder used as adsorbent， Sr（NO₃）₂ was used as the simulacrum for radioactive waste liquid of middle level containing ⁹⁰Sr， and the natural perlite with different size was used as adsorbent. The adsorptive experiment of Sr²⁺ was conducted using perlite powder. The chemical compositions of perlite， micro-structures of the as-gained samples and adsorptive results of Sr²⁺ were irrespectively characterized by means of X-ray fluorescence spectrometry， scanning electron microscopy and atomic absorption spectrometry. The results indicated that the disposal of Sr²⁺ was quickly carried by perlite powder as adsorptive materials under the condition of pH=7， the relation between the treatment effect on Sr²⁺ particle size was consistent， the best treatment effect in which the remove rate was 89% after 5 min was found when the size of perlite was 75~100 μm. Perlite powder was a better candidate for the disposal of neutral solution containing Sr²⁺. 

Keywords：perlite； strontium； radioactive； disposal of waste liquid