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描述了硫酸铵溶液中铀矿坑水样品中铀的电沉积层特性。电沉积液为10ml0.8M的硫酸铵溶液,电流密度0.6A/cm2,pH值为2.5,电镀1h。电沉积经化学分离后的水样品和电沉积的纯硝酸铀酰样品进行了比较,并对二者分别做了红外(IR)光谱、扫描电镜(SEM)、元素分析以及α能谱测量。IR谱上铀酰离子的反对称伸缩振动峰在887cm-1附近,使电沉积在不锈钢片上的铀主要以铀酰离子水合物的形式存在,有一部分NH4+以NH3的形式替代水合物中的水,使电沉积层中铀的化合物形式为UO2(OH)2.xNH3.yH2O或者UO2(OH)2-x.(ONH4)x.yH2O,铀酰离子通过链的形式形成聚合结构。SEM照片显示电沉积层均匀,没堆积成团现象出现。α谱表明电沉积层中铀的同位素主要是238U和234U,相应的α能量峰4198和4773keV很显著,没其它峰的干扰。
Describes the electrodeposition characteristics of uranium in uranium mine water samples from ammonium sulfate solution. Electrodeposition solution is 10ml0.8M ammonium sulfate solution, the current density of 0.6A / cm2, pH value of 2.5, electroplating 1h. The electrodeposited water sample was compared with the electrodeposited pure uranyl nitrate sample. The IR spectra, scanning electron microscopy (SEM), elemental analysis and α-energy spectrum measurements of the two samples were done respectively. IR spectra of uranyl ion antisymmetric stretching vibration peak around 887cm-1, so that the electrodeposition of stainless steel uranium mainly in the form of uranyl ion hydrate, a part of NH4 + in the form of NH3 instead of hydrate water So that the uranium compound in the electrodeposited layer is in the form of UO2 (OH) 2.xNH3.yH2O or UO2 (OH) 2-x. (ONH4) x.yH2O. The uranyl ion forms a polymeric structure through the chain. SEM photo shows the electrodeposition uniform, no accumulation of clusters appear phenomenon. The α spectrum shows that the isotopes of uranium in the electrodeposited layer are mainly 238U and 234U, and the corresponding α energy peaks of 4198 and 4773 keV are significant with no interference from other peaks.