Development of the rapid preconcentration method for determination of actinides in large volume seawater sample using Actinide resin

被引:0
作者
Kang, Yoo-Gyum [1 ,2 ]
Park, Ji-Young [1 ]
Lim, Jong-Myoung [1 ]
Jang, Mee [1 ]
Kim, Hyuncheol [1 ]
Lee, Jin-Hong [2 ]
机构
[1] Korea Atom Energy Res Inst, Environm Radioact Assessment Team, Daejeon 34057, South Korea
[2] Chung Nam Natl Univ, Dept Environm Engn, Daejeon 34134, South Korea
基金
新加坡国家研究基金会;
关键词
actinide resin; actinides; concentration; seawater; ICP-MS; microwave digestion; PLUTONIUM ISOTOPES; EXTRACTION; SEPARATION; AMERICIUM; SR-90;
D O I
10.5806/AST.2020.33.4.186
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A simple and rapid preconcentration method of actinide from seawater using Actinide resin was developed and tested with the seawater spiked with a known U and Th. The developed method of Actinide resin based on column chromatography is less time-consuming and requires less labor compared with a typical co-precipitation technique for preconcentration of actinides. U and Th, which are relatively weak-bonded with Actinide resin among actinides, were used to determine the optimum flow rate of seawater sample and evaluate the capacity of Actinide resin to concentrate actinides from seawater. A flow rate of 50 mL min(-1) was available with Actinide resin 2 mL (BV, bed volume). When 5 or 10 L of seawater containing U were loaded on Actinide resin (2 mL, BV) at 50 mL min(-1), the recovery of U was 93 % and 86 %, respectively. For extraction of actinides bound with Actinide resin, we compared three methods: solvent extraction, ashing-acid digestion, and ashingmicrowave digestion. Ashing-microwave digestion method shows the best performance of which is the recovery of 100 % for U and 81 % for Th. For the preconcentration of actinides in 200 L of seawater, a typical coprecipitation method requires 2-3 days, but the developed method in this study is achieved the high recovery of actinides within 12 h.
引用
收藏
页码:186 / 196
页数:11
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