聚合铝对铀(Ⅵ)的吸附

摘要

研究了聚合铝对铀的吸附以及在含铝离子的溶液中用偶氮胂Ⅲ进行铀的测定方法的探索.研究表明:在1∶1(体积比)的盐酸介质中,当c(AlCl3)＜0.1 mol/L时,用偶氮胂Ⅲ测定铀误差小于10％,摩尔吸光系数仅103 L/(mol·cm).当聚合铝的羟铝比为2、铝浓度为5.64×10-3 mol/L时,可实现铀的吸附率在90％以上.因此聚合铝是一种很好的吸附铀的材料,并可实现含铀废水的减容,从而降低核废物处理成本.%This paper investigates the adsorption of uranium on the polyaluminium and the determination of uranium in the solution containing aluminum ion using Arsenazo III. Research shows that; the error of uranium determination using Arsenazo HI is less than 10% when the concentration of aluminum is less than 0. 1 mol/L in the 1 : 1 hydrochloric acid medium, molar absorption coefficient is 103 L/(mol · cm). When OH- is two times aluminum in the polyaluminum and the concentration of aluminum is 5. 64 × 10-3 mol/L, the removal rate of uranium can reach 90% or more. Therefore, polyaluminum is a kind of very good uranium adsorption materials, and it can realize the volume reduction of the waste water containing uranium, thus reducing the costs of nuclear waste disposal.