Developemnt of Rapid Monitoring for Dissolved Radioactive Cesium with a Cartridge Type of Prussian blue-impregnated Nonwoven Fabric

Rapid quantification of radiocesium dissolved in water by using nonwoven fabric cartridge filters impregnated with potassium zinc ferrocyanide

“…This cartridge is hereafter called the nonwoven fabric cartridge filter impregnated with potassium zinc ferrocyanide ("Zn-C"). A similar cartridge filter that employs nonwoven fabric impregnated with PB (i.e., a PB-C) has been developed; its performance in absorbing dissolved radiocesium in water has been reported by Yasutaka et al [12] and Tsuji et al [13].…”

“…137 Cs collected by the Zn-C, and distribution of Cs in the Zn-C Yasutaka et al [12] and Tsuji et al [13] recommend that, for non-destructive measurement of 137 Cs concentrations, a Ge semiconductor detector covered in a plastic case be used to test samples collected by PBCs (Photo 1). Using non-destructive detection measurement, to calculate the actual 137 Cs radioactivity (Bq) or concentration (Bq L −1 ), the detected 137 Cs radioactivity or concentration was divided by a non-destructive detection efficiency (geometric efficiency).…”

“…The authors previously found the non-destructive detection efficiency of the PB-C to be 0.77 by calculating the ratio of 137 Cs radioactivity in the cartridge as measured by non-destructive detection to the actual radioactivity of 137 Cs [12]. Here, the non-destructive detection efficiency of the Zn-C was calculated by using the same method, compared actual radioactivity of the 137 Cs in the Zn-C and radioactivity of the 137 Cs measured by non-destructive detection method.…”

“…* Yasutaka et al [12], * * Tsuji et al [13]. Zn-C, nonwoven fabric cartridge filter impregnated with potassium zinc ferrocyanide; PB-C, cartridge filter using nonwoven fabric impregnated with Prussian blue investigated.…”

“…Cartridge filters impregnated with PB ("PB-C" hereinafter) have been shown to rapidly absorb dissolved radiocesium. Two such devices connected in series have recovered 92% of dissolved radiocesium at a flow rate of 2.5 L/min [12]. However, the absorption efficiency of the PB-C decreases in the case of water samples that are either somewhat acidic or somewhat basic [13,14].…”