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Standard Test Method for Distribution Coefficients of Inorganic Species by the Batch Method
Automatische name übersetzung:
Standard Test Method for Verteilungskoeffizienten der anorganischen Spezies von der Batch-Methode
NORM herausgegeben am 1.10.2010
Bezeichnung normen: ASTM C1733-10
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.10.2010
SKU: NS-12336
Zahl der Seiten: 8
Gewicht ca.: 24 g (0.05 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
adsorption, attenuation, batch sorption, distribution coefficient, geochemical, ground water, ion exchange capacity, isotherm, liquid migration, short-term batch, ICS Number Code 13.080.99 (Other standards related to soil quality), 71.040.40 (Chemical analysis)
Significance and Use | ||||||||||||||||
The distribution coefficient,
Kd, is an experimentally
determined ratio quantifying the distribution of a chemical species
between a given fluid and geomedium sample under certain
conditions, including the attainment of constant aqueous
concentrations of the species of interest. The Kd concept is used in mass transport
modeling, for example, to assess the degree to which the movement
of a species will be delayed by interactions with the geomedium as
the solution migrates through the geosphere under a given set of
underground geochemical conditions (pH, temperature, ionic
strength, etc.). The retardation factor (Rf) is the ratio of the velocity of the
groundwater divided by the velocity of the contaminant, which can
be expressed as: |
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1. Scope | ||||||||||||||||
1.1 This test method covers the determination of distribution coefficients of chemical species to quantify uptake onto solid materials by a batch sorption technique. It is a laboratory method primarily intended to assess sorption of dissolved ionic species subject to migration through pores and interstices of site specific geomedia. It may also be applied to other materials such as manufactured adsorption media and construction materials. Application of the results to long-term field behavior is not addressed in this method. Distribution coefficients for radionuclides in selected geomedia are commonly determined for the purpose of assessing potential migratory behavior of contaminants in the subsurface of contaminated sites and waste disposal facilities. This test method is also applicable to studies for parametric studies of the variables and mechanisms which contribute to the measured distribution coefficient. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||||||
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Historisch
1.12.2011
Historisch
1.11.2009
Historisch
1.8.2013
Historisch
15.1.2013
Historisch
1.5.2014
Historisch
1.9.2012
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