Abstract

The study deals with the uranium removal from a raffinate solution (nitric acid waste solution from the production of uranium yellowcake) using an extractant-impregnated material. A polyamide sheet (Nylon 6,6) was impregnated with trioctylphosphine oxide and tested for uranium removal. The factors affecting the impregnation process, namely, extractant concentration, impregnation time, volume/mass ratio, impregnation temperature, and diluent type were studied. The effect of the initial uranium concentration, adsorption temperature, contact time, and pH on the uranium adsorption on the prepared sheet was also studied. The uranium adsorption behavior was described using adsorption isotherms.

中文翻译：

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用三辛基膦氧化物改性尼龙6,6以去除水溶液中的铀

摘要

该研究涉及使用浸有萃取剂的材料从提余液（铀黄饼生产中产生的硝酸废液）中去除铀。用三辛基膦氧化物浸渍聚酰胺片材（尼龙6,6），并测试其去除铀的能力。研究了影响浸渍过程的因素，即萃取剂的浓度，浸渍时间，体积/质量比，浸渍温度和稀释剂类型。还研究了初始铀浓度，吸附温度，接触时间和pH值对所制备薄片上铀吸附的影响。用吸附等温线描述了铀的吸附行为。