Development of a method for rapid and simultaneous monitoring of particulate and dissolved radiocesium in water with nonwoven fabric cartridge filters

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

“…P-7 and the no. P-8 was described in Tsuji et al [13]. between 6.0 and 7.0; the electrical conductivity ranged from 467 to 1482 µS/cm.…”

“…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].…”

“…With the Zn-C method, suspended particles in the sampled river water were immediately filtered on-site with the 1-µm pore size nonwoven fabric cartridge filters (1-µm nominal pore size [13]; capable of collecting more than 81% of particles of pore size 0.4-0.5 µm [21]). Two Zn-Cs were used in series along the direction of flow.…”

“…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).…”

“…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]. To allow their use with water at a wide pH range, the efficiency of absorption of dissolved radiocesium by such cartridge filters must be improved.…”