Cs Separation on AMP-PAN
and KNiFC-PAN Resins$1--
$03-3$1 contains an inorganic ion exchange material(ammonium molybdophosphate, AMP) dispersed in an inert
polymeric support (polyacrylonitrile, PAN). The AMP has beenshown to exhibit high selectivity for Cs from a wide range ofsolutions, including high acid concentrations and high salt
concentrations (sea water). The AMP is imbedded into the PAN
to improve the flow characteristics of packed columns. TheŵŵŽŶŝƵŵmaterial exhibits fast kinetics and high radiation stability, with noDŽůǇďĚŽWŚŽƐƉŚĂƚĞ
change in uptake observed for radiation doses of up to 1000kGy [1]. Recovery of Cs from the AMP-PAN resin requires
elution with 10 bed volumes of 5M NH4Cl or NH4NO3.
AMP-PAN has been used to remove Cs-137 from radioactive acidic waste streams containing high levels ofsodium and potassium [2]. Actual waste and waste simulants were loaded onto 1.5 mL columns at 0.7 mL/min. In thefirst cycle, 0.15% breakthrough of Cs-137 was measured after 1500 mL of feed (99.85% Cs-137 removal). Afterregenerating the column by eluting Cs-137 with 50 mL of 5M NH4NO3, 0.53% breakthrough of Cs-137 was measured
after 1250 mL of feed (99.47% removal of Cs-137). Average recovery of Cs-137 in the 5M NH4NO3 regeneration cycles
was 87%.
AMP-PAN has also been used to recover Cs-137 from sea water samples [3]. 5 mL columns of AMP-PAN wereused to process 20 L samples of sea water which had been acidified to pH 1-2. Stable Cs, measured by ICP-MS, wasused to trace the chemical recovery during the column separation. Flow rates of 35 mL/min were used. Recovery of Cswas 93.5 + 5.0%.

5HDJHQWVAMP-PAN Resin
5 mL Cartridges (HC5-R10-M)
2 mL Columns (HC-C50-M)
5 mL Columns (HC5-C20-M)
8 mL Columns (HC8-C20-M)
10 mL Columns (HC10-C20-M)
Nitric Acid (70%)
Deionized Water
Ammonium chloride or Ammonium Nitrate(TXLSPHQW
Vacuum Box (AR-24-BOX or AR-12-BOX)*
Cartridge Reservoir, 20mL (AR-200-RV20)*
Inner Support Tubes-PE (AR-1000-TUBE-PE)*
Yellow Outer Tips (AR-1000-OT)*
50 mL Centrifuge Tubes
Vacuum Pump**Or appropriately sized gravity flow column andaccessories (see reverse).

5HIHUHQFHV1) F. Sebesta, V. Stefula, “Composite ion exchanger with ammonium molybdophosphate and its properties” J.
Radioanal, Nucl. Chem., 140(1), 15-21 (1990).
2) Brewer, et al. “AMP-PAN column tests for the removal of Cs-137 from actual and simulated INEEL high-activitywastes,” Czechoslov J Phys, 49(S1), 959-964 (1999).
3) Pike, et al. “Extaction of cesium in seawater off Japan using AMP-PAN resin and quantification via gamma
spectroscopy and inductively coupled plasma mass spectrometry,” J Radioanal Nucl Chem, 296(1), 369-374 (2012).
4) Triskem INFOS, No 10, July 2013. http://www.triskem-international.com/scripts/files/59d1f4fc2ec7b3.42683976/
tki10_binder_en_web.pdf

.1L)&-3$1 contains an inorganic ion exchange material (potassium nickel
ferrocyanate, KNiFC) dispersed in an inert polymeric support (polyacrylonitrile,PAN). The KNiFC has been shown to exhibit high selectivity for Cs from a wide
range of solutions, including sea water and other environmental waters. The KNiFC
is imbedded into the PAN to improve the flow characteristics of packed columns.
KNiFC-PAN has been used to remove cesium from sea water samples [5].
WŽƚĂƐƐŝƵŵEŝĐŬĞů
100 L samples of sea water were processed through 25 mL columns of KNiFC-PAN
at flow rates of up to 300 mL/min. Stable Cs was added as a yield tracer (measured&ĞƌƌŽǇĂŶĂƚĞ;<Eŝ&Ϳ
by ICP-MS). Yields for cesium were 92.9 + 1.1% for 100 L samples of sea water
acidified to pH 1. For 100 L samples of sea water (unacidified), cesium yields were 90.2 + 2.7%.

5HDJHQWVKNiFC-PAN Bulk Resin (NC-B50-M)
Nitric Acid (70%)
Hydrochloric Acid (37%)
Deionized Water(TXLSPHQW
Empty Columns
2 mL snap tip (AC-141-AL)
2 mL cap tip (AC-100-MT-PP)
5 mL (AC-50E-5M)
20 mL (AC-20E-20M)
Column Reservoir
For 2 mL columns (AC-120-TK)
250 mL For 5 and 20 mL columns (AC-20X-20M)
Column Rack
15 hole for 2 mL columns (AC-103)
12 hole for 5 and 20 mL columns (AC-20M-RACK)
50 mL Centrifuge Tubes

Comparison of AMP-PAN and KNiFC-PAN Resins
Paramater
Cs Capacity
DensityRecommended sample pH
Sample Types
Regeneration

AMP-PAN64 mg / g dry resin
0.27 g/mL
1-2
Waste, Environmental
5M NH4Cl or NH4NO3

KNiFC-PAN
256 mg / g dry resin
0.20 g/mL
1-7
Environmental
None

5HIHUHQFHV5) Kamenik, et al. “Fast concentration of dissolved forms of cesium radioisotopes from large sea water samples,”J. Radioanal. Nucl. Chem., 292(2), 841-846 (2012)
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