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

분석과학 2020년 33권 4호 p.186 ~ 196
강유겸, 박지영, 임종명, Jang Mee, 김현철, 이진홍,
소속 상세정보
강유겸 ( Kang Yoo-Gyum ) - Korea Atomic Energy Research Institute Environmental Radioactivity Assessment Team
박지영 ( Park Ji-Young ) - Korea Atomic Energy Research Institute Environmental Radioactivity Assessment Team
임종명 ( Lim Jong-Myoung ) - Korea Atomic Energy Research Institute Environmental Radioactivity Assessment Team
 ( Jang Mee ) - Korea Atomic Energy Research Institute Environmental Radioactivity Assessment Team
김현철 ( Kim Hyun-Cheol ) - Korea Atomic Energy Research Institute Environmental Radioactivity Assessment Team
이진홍 ( Lee Jin-Hong ) - Chungnam National University Deptarment of Environmental Engineering

Abstract


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.

키워드

actinide resin; actinides; concentration; seawater; ICP-MS; microwave digestion

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