Studies on the acidification of carbonate waste stream for separation of di-butyl phosphate and recovery of metal

IF 1.4 3区 化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR
Satyabrata Mishra, Pankaj, Chayan Patra, Debojyoti Ghosh, N. Desigan, P. Velavendan, K. A. Venkatesan, Ananthasivan Krishnamurthy
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引用次数: 0

Abstract

Abstract The aqueous waste generated during the treatment of Purex lean organic phase with alkaline carbonate solution contains washable degradation products and actinides in the form of carbonate complex. Management of such aqueous waste demands quantitative removal of the main degradation product, dibutyl phosphate (HDBP) and actinides from aqueous solution. In this context, batch studies have been carried out on the separation of HDBP from aqueous solution using n-dodecane (n-DD). For this purpose, the extraction behaviour of HDBP in n-DD was studied after acidification of alkaline carbonate solution with nitric acid. The studies with simulated waste containing HDBP and U(VI) nitrate showed the loss of U(VI) as precipitate during acidification as the uranium–DBP was poorly soluble in aqueous phase. However, the loss of U(VI) decreased with increase of aqueous phase acidity showing that the adjusted acidity of the carbonate waste plays an important role in the recovery of actinides.
关于酸化碳酸盐废液以分离磷酸二丁酯和回收金属的研究
摘要 在用碱性碳酸盐溶液处理 Purex 贫有机相的过程中产生的水性废物含有碳酸盐复合物形式的可洗涤降解产物和锕系元素。要对此类水性废物进行管理,就必须从水溶液中定量去除主要降解产物磷酸二丁酯(HDBP)和锕系元素。为此,我们利用正十二烷(n-DD)对从水溶液中分离 HDBP 进行了批量研究。为此,在用硝酸酸化碱性碳酸盐溶液后,对正十二烷中 HDBP 的萃取行为进行了研究。对含有 HDBP 和硝酸铀(VI)的模拟废物进行的研究表明,由于铀-DBP 在水相中的溶解度很低,因此在酸化过程中,铀(VI)会以沉淀的形式流失。然而,随着水相酸度的增加,U(VI) 的损失也在减少,这表明碳酸盐废物的调整酸度在锕系元素的回收中起着重要作用。
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来源期刊
Radiochimica Acta
Radiochimica Acta 化学-核科学技术
CiteScore
2.90
自引率
16.70%
发文量
78
审稿时长
6 months
期刊介绍: Radiochimica Acta publishes manuscripts encompassing chemical aspects of nuclear science and technology.
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