Elution of Ions from Melting Snow. Chromatographic Versus Metamorphic Mechanisms

Columns of natural and laboratory-aged snow grains and frozen water droplets were washed with deionized distilled water and with synthetic precipitation solutions to investigate both snowpack chemical fractionation and preferential ion elution. Concentrations of Cl-, NO-3 and So2-4 in sequential fra...

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Bibliographic Details
Main Authors: Cragin, James H., Hewitt, Alan D., Colbeck, Samuel C.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1993
Subjects:
Physical Chemistry
Snow
Ice and Permafrost
Crystallography
*SNOW
*CRYSTAL GROWTH
*ELUTION
IONS
CRYSTALS
MELTING
CHROMATOGRAPHY
FRACTIONATION
DISTILLED WATER
ANIONS
LABORATORIES
ICE
PRECIPITATION
SNOW CRYSTAL GROWTH
MELTWATER
PE61102A
WU002
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA270430
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA270430
Description
Summary:Columns of natural and laboratory-aged snow grains and frozen water droplets were washed with deionized distilled water and with synthetic precipitation solutions to investigate both snowpack chemical fractionation and preferential ion elution. Concentrations of Cl-, NO-3 and So2-4 in sequential fractions of the column's eluate showed no chromatographic effects, indicating that ice crystals do not possess selective affinity for inorganic anions. Consequently, preferential chemical elution previously observed in melting snow is not caused by snow acting as a chromatographic column. Additional column experiments involving elution from frozen solution drops and from aged snow showed that both fractionation and preferential elution were strongly influenced by ion exclusion during the snow crystal growth.

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