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Acrylic fibers coated with copper hexacyanoferrate to determine 137Cs activity in coastal seawater of Vietnam

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A method employing 137Cs sorption to copper hexacyanoferrate (Cu2[Fe(CN)6])-coated fibers for determining 137Cs activity in seawater is presented in this paper. The Cu2[Fe(CN)6]-coated fibers were packed into a PVC cartridge and used to treat 300 L of seawater, exhibiting a 137Cs sorption efficiency of above 99%. The Cu2[Fe(CN)6]-fiber samples containing 137Cs were subsequently dried and placed into a 500 mL Marinelli beaker to determine the activity concentrations by gamma spectrometry. This method was applied to seawater of the Phuoc Dinh and Vinh Hai coastal areas in Ninh Thuan province, Vietnam. The activity concentrations of 137Cs in the surveyed areas ranged from 1.14 to 1.44 Bq/m3. The activities of 137Cs in the seawater samples of this work were compared with those observed in seawater on the coasts of Vietnam and other countries along the South China Sea.

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The work is done within the framework of the KC.05.17/16-20 project. The authors would like to thank the program management board and the leaders for creating favorable conditions for the group to carry out this work.

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Correspondence to Nguyen Trong Ngo or Le Ngoc Chung.

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Ngo, N.T., Thang, L.X., Van Phuc, N. et al. Acrylic fibers coated with copper hexacyanoferrate to determine 137Cs activity in coastal seawater of Vietnam. J Radioanal Nucl Chem 326, 919–924 (2020).

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