Preconcentration of Cs in Seawater
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1. Ammonium molybdo phosphate (AMP) 2. Copper ferrocyanate (Cu Fe(CN)6) 1 Ammonium molybdo phosphate (AMP) Sea Water (150 liters) Acidification to pH = 2 + tracers: 134 Cs + carriers: Cs (40 mg) + AMP Mix vigorously for 10 to 15 minutes. Allow to settle overnight. Remove supernatant. Collect AMP suspension AMP(Cs) suspension from sea water
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Marine Radionuclide
Transcript of Preconcentration of Cs in Seawater
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Ammonium molybdo phosphate (AMP)
Copper ferrocyanate (Cu Fe(CN)6) 1 Ammonium molybdo phosphate (AMP)
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AMP(Cs) suspension from sea watersettling, siphoning/decantingof supernatant solution,centrifuging AMP(Cs)AMP(Cs) precipitate (1st)+ 10M NaOH to dissolve AMP(Cs)centrifuge/filter insoluble residueCs+, NH3, (MoO3)12PO43- solution in NaOHheat, boil out NH3dilute to 500 mlacidify to pH = 2 with conc HCladd 1g fresh AMPAMP(Cs) precipitate (2nd) settling, decanting, centrifuging+10M NaOH to dissolve AMP(Cs)adjust volume to standard geometry134Cs, 137Cs solution for gamma spectrometry
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Cartridge preparation:
cartridges used in cotton with a stainless steel core.(Cuno Mycrowynd C-CCTY 1m cotton media, stainless steel core 316).2 Pre-concentration of caesium using CuFeCN6 cartridges.
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Use of cartridge:
a) With 134Cs tracer:
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b) Without 134Cs tracer:Note the salinity and the temperature.Filter the water through a 1m polypropylene cartridge.Use a flow meter to check the volume and the flow rate.Use two Cu Fe(CN)6 cartridges.
