Document Details


Title:
THE CONCENTRATION OF TRACE ELEMENTS FROM SEA WATER BY ION EXCHANGE
Subject Terms:
ION EXCHANGE; SEAWATER; CHELATING AGENTS; IRON 59; ZINC 65; SILVER 110; ADSORPTION; DIAGRAMS
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1966 Dec 06
Declassification Status:
Unknown
Document Pages:
0034
Accession Number:
NV0060300
Document Number(s):
USNRDLTR6710
Originating Research Org.:
UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATOR
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
A STUDY WAS CONDUCTED TO DETERMINE THE FEASIBILITY OF CONCENTRATING TR ACE ELEMENTS FOUND IN SEA WATER BY ION EXCHANGE. THE CONVENTIONAL ION -EXCHANGE MATERIALS ARE NOT SUFFICIENTLY SPECIFIC IN SEA WATER FOR THI S TASK. HOWEVER, CHELEX 100, A CHELATING RESIN, HAS SUPERIOR PROPERTI ES FOR ACCOMPLISHING SUCH SEPARATIONS. CHELEX 100 QUANTITATIVELY REMO VES DIVALENT COBALT FROM SEA WATER. IN THE COURSE OF THE INVESTIGATIO N IT WAS FOUND THAT COBALT EXISTS ALSO AS A COBALT PLUS 3 COMPLEX IN S EA WATER. THIS COMPLEX IS NOT RETAINED BY THE CHELATING RESIN. BY TH E COMBINATION OF CHELEX 100 AND ACTIVATED CHARCOAL IN A COLUMN ALL OF THE COBALT COULD BE SEPARATED. ALL OF THE COBALT IN SEA WATER COULD A LSO BE CONCENTRATED ON CHELEX 100 IF THE COBALT PLUS 3 SPECIES WAS FIR ST REDUCED WITH A SUITABLE METAL. ELECTROREDUCTION AND THE USE OF OTH ER REDUCING AGENTS WAS ABOUT 99 PERCENT EFFECTIVE. PRELIMINARY INVEST IGATIONS WITH IRON-59, ZINC-65, AND METASTABLE SILVER 110 SHOWED THAT THE ZINC AND IRON ALSO COULD BE CONCENTRATED WITH CHELEX 100. ONLY 54 PERCENT OF THE SILVER WAS RETAINED. IRON IS QUITE SIMILAR TO COBALT IN ITS BEHAVIOR IN SEA WATER: TWO OXIDATION STATES EXIST SIMULTANEOUS LY BUT ONLY ONE IS QUANTITATIVELY ADSORBED.


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