Abstract

Samples of Egyptian phosphate ore obtained from Om Salmah mine at El-Sibaiya, Nile valley, were analyzed for some lanthanides and concomitant elements by instrumental neutron activation analysis. The use of a high-resolution HPGe detector connected to a PC-based multichannel analyzer enabled simultaneous nondestructive multielement analysis in a single irradiation run with good accuracy. The following elements were determined after relatively short cooling time (5 days): lanthanides (La, Ce, Eu, Nd, Sm, Gd, Tb, Yb), concomitant elements (Ba, Br, Ca, Co, Cr, Fe, Hf, Na, Rb, Sb, Sc, Se, Sr, Zn, Zr), and actinides (Th, U). After longer cooling time, the following elements were determined: La, Ce, Nd, Eu, Gd, Tb, Yb, and the concomitant elements: Cr, Fe, Hf, Nb, Sc, Th, Co, Zn, and Zr. Adsorption experiments were performed on synthesized inorganic ion exchangers: zirconium titanium phosphate (ZTP) with different Zr : Ti molar ratios and ceric tungstate (CeW), as well as on organic cation and anion exchangers: Dowex-50×8 and Dowex-1×8, respectively. The adsorption was performed from solutions containing dilute HCl and HNO₃, formed by dissolving the irradiated phosphate samples in aqua regia, diluting, and cooling for a certain time. The effect of some factors on the adsorption was studied. Some options for separating the elements were suggested.

中文翻译：

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埃及磷酸盐样品的仪器中子活化分析及其元素含量的吸附研究

摘要

通过仪器中子活化分析，分析了从尼罗河谷El-Sibaiya的Om Salmah矿获得的埃及磷酸盐矿石的样品中的镧系元素和伴随元素。与基于PC的多通道分析仪连接的高分辨率HPGe检测器的使用可在单次辐照运行中以高精度同时进行无损多元素分析。在较短的冷却时间（5天）后确定了以下元素：镧系元素（La，Ce，Eu，Nd，Sm，Gd，Tb，Yb），伴随元素（Ba，Br，Ca，Co，Cr，Fe，Hf ，Na，Rb，Sb，Sc，Se，Sr，Zn，Zr）和act系元素（Th，U）。经过更长的冷却时间后，确定了以下元素：La，Ce，Nd，Eu，Gd，Tb，Yb和伴随的元素：Cr，Fe，Hf，Nb，Sc，Th，Co，Zn和Zr。在合成的无机离子交换剂：具有不同Zr：Ti摩尔比和铈钨酸盐（CeW）的磷酸锆钛（ZTP）以及有机阳离子和阴离子交换剂：Dowex-50×8和Dowex-1×上进行了吸附实验。 8，分别。从含稀HCl和HNO的溶液中进行吸附_{如图3所示}，通过将辐照过的磷酸盐样品溶解在王水中，稀释并冷却一定时间而形成。研究了一些因素对吸附的影响。建议了一些用于分隔元素的选项。