Determination of uranium in seawater using chemical co-precipitation-ionic liquid electrodeposition by ICP-OES

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2025-02-10 DOI:10.1007/s10967-025-09989-x

Chol-Hun Yun, Pyong-Hun Kim, Chol-Jin Jo, Un-Hui Jang

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Abstract

In this paper, we report a new combined method of chemical coprecipitation-ionic liquid electrodeposition for the determination of trace uranium in seawater. The procedure involves coprecipitation of trace uranium on Fe(OH)₃ upon addition of ferric chloride and electrodeposition of uranium in EMIMBF₄ to determine by inductively coupled plasma optical emission spectrometry(ICP-OES). The solution, which ferric chloride was added to 1 L of seawater sample and adjusted the pH to 4, was placed at 80 °C for 30 min to coprecipitate uranium with iron hydroxide. The precipitate was then dissolved in nitric acid and electrodeposited in EMIMBF₄ to determine uranium by ICP-OES. The coefficient of diffusion (D) of electrodeposition of U (VI) on platinum electrode in EMIMBF₄ was evaluated, which was 3.31 × 10⁻⁹ cm²/s. The electrochemistry experiments indicated that the reduction of U (VI) at platinum electrode in EMIMBF₄ was a quasi-reversible single step two-electron transfer. The percent of chemical coprecipitation recovery of U (VI) was 98.9% and recovery in electrodeposition was 99.5%. Using combine of two methods can determined trace uranium in seawater.

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化学共沉淀-离子液体电沉积ICP-OES法测定海水中的铀

本文报道了化学共沉淀法-离子液体电沉积法测定海水中痕量铀的新方法。该方法包括在Fe(OH)3上加入氯化铁共沉淀微量铀，并在EMIMBF4中电沉积铀，通过电感耦合等离子体光学发射光谱法（ICP-OES）测定。将氯化铁加入1 L海水样品中，调节pH为4，在80℃下放置30 min，使铀与氢氧化铁共沉淀。将沉淀溶解于硝酸中，电沉积于EMIMBF4中，用ICP-OES法测定铀。对EMIMBF4中铂电极上U （VI）电沉积的扩散系数(D)进行了评价，其扩散系数为3.31 × 10−9 cm2/s。电化学实验表明，EMIMBF4中铂电极上U （VI）的还原是准可逆的单步双电子转移。化学共沉淀法U （VI）的回收率为98.9%，电沉积法回收率为99.5%。采用两种方法联合测定海水中痕量铀。

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.