ASTM D5744-07
(Test Method)Standard Test Method for Laboratory Weathering of Solid Materials Using a Humidity Cell
Standard Test Method for Laboratory Weathering of Solid Materials Using a Humidity Cell
SCOPE
1.1 This kinetic test method covers a laboratory weathering procedure that (1) enhances reaction-product transport in the aqueous leach of a solid material sample of specified mass, and (2) measures rates of weathering-product mass release. Soluble weathering products are mobilized by a fixed-volume aqueous leach that is performed and collected weekly. Leachate samples are analyzed for pH, alkalinity/acidity, specific conductance, sulfate, and other selected analytes.
1.1.1 This test method is intended for use to meet kinetic testing regulatory requirements for mining waste rock and ores sized to pass a 6.3-mm (0.25-in.) Tyler screen.
1.1.2 Interlaboratory testing of this method has been confined to mine waste rock. Application of this test method to metallurgical-processing waste (for example, mill tailings) is outside the scope of the test method.
1.2 This test method is a modification of a laboratory weathering procedure developed originally for mining wastes (1-3). However, it may have useful application wherever gaseous oxidation coupled with aqueous leaching are important mechanisms for contaminant mobility.
1.3 This test method calls for the weekly leaching of a well-characterized solid material sample (weighing at least 1000-g), with water of specified purity, and the collection and chemical characterization of the resulting leachate. Test duration is determined by the users objectives of the test.
1.4 As described, this test method may not be suitable for some materials containing plastics, polymers, or refined metals. These materials may be resistant to traditional particle size reduction methods.
1.5 Additionally, this test method has not been tested for applicability to organic substances and volatile matter.
1.6 This test method is not intended to provide leachates that are identical to the actual leachate produced from a solid material in the field or to produce leachates to be used as the sole basis of engineering design.
1.7 This test method is not intended to simulate site-specific leaching conditions. It has not been demonstrated to simulate actual disposal site leaching conditions. Furthermore, the test is not designed to produce effluents that are in chemical equilibrium with the solid phase sample.
1.8 This test method is intended to describe the procedure for performing the laboratory weathering of solid materials to generate leachates. It does not describe all types of sampling and analytical requirements that may be associated with its application.
1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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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Designation:D5744–07
Standard Test Method for
Laboratory Weathering of Solid Materials Using a Humidity
1
Cell
This standard is issued under the fixed designation D5744; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope material in the field or to produce leachates to be used as the
sole basis of engineering design.
1.1 This kinetic test method covers a laboratory weathering
1.7 Thistestmethodisnotintendedtosimulatesite-specific
procedure that (1) enhances reaction-product transport in the
leaching conditions. It has not been demonstrated to simulate
aqueousleachofasolidmaterialsampleofspecifiedmass,and
actualdisposalsiteleachingconditions.Furthermore,thetestis
(2)measuresratesofweathering-productmassrelease.Soluble
not designed to produce effluents that are in chemical equilib-
weathering products are mobilized by a fixed-volume aqueous
rium with the solid phase sample.
leachthatisperformedandcollectedweekly.Leachatesamples
1.8 This test method is intended to describe the procedure
are analyzed for pH, alkalinity/acidity, specific conductance,
for performing the laboratory weathering of solid materials to
sulfate, and other selected analytes.
generate leachates. It does not describe all types of sampling
1.1.1 This test method is intended for use to meet kinetic
and analytical requirements that may be associated with its
testingregulatoryrequirementsforminingwasterockandores
application.
sized to pass a 6.3-mm (0.25-in.) Tyler screen.
1.9 The values stated in SI units are to be regarded as the
1.1.2 Interlaboratory testing of this method has been con-
standard. The values given in parentheses are for information
fined to mine waste rock. Application of this test method to
only.
metallurgical-processing waste (for example, mill tailings) is
1.10 This standard does not purport to address all of the
outside the scope of the test method.
safety concerns, if any, associated with its use. It is the
1.2 This test method is a modification of a laboratory
responsibility of the user of this standard to establish appro-
weathering procedure developed originally for mining
2
priate safety and health practices and determine the applica-
wastes(1-3). However, it may have useful application wher-
bility of regulatory limitations prior to use.
ever gaseous oxidation coupled with aqueous leaching are
important mechanisms for contaminant mobility.
2. Referenced Documents
1.3 This test method calls for the weekly leaching of a
3
2.1 ASTM Standards:
well-characterized solid material sample (weighing at least
D75 Practice for Sampling Aggregates
1000-g), with water of specified purity, and the collection and
D276 Test Methods for Identification of Fibers in Textiles
chemical characterization of the resulting leachate. Test dura-
D420 Guide to Site Characterization for Engineering De-
tion is determined by the user’s objectives of the test.
sign and Construction Purposes
1.4 As described, this test method may not be suitable for
D653 Terminology Relating to Soil, Rock, and Contained
some materials containing plastics, polymers, or refined met-
Fluids
als.These materials may be resistant to traditional particle size
D737 Test Method for Air Permeability of Textile Fabrics
reduction methods.
D1067 Test Methods for Acidity or Alkalinity of Water
1.5 Additionally, this test method has not been tested for
D1125 Test Methods for Electrical Conductivity and Resis-
applicability to organic substances and volatile matter.
tivity of Water
1.6 This test method is not intended to provide leachates
D1193 Specification for Reagent Water
that are identical to the actual leachate produced from a solid
D1293 Test Methods for pH of Water
D1498 Test Method for Oxidation-Reduction Potential of
1
This test method is under the jurisdiction ofASTM Committee D34 on Waste Water
Management and is the direct responsibility of Subcommittee D34.01.04 on Waste
Leaching Techniques.
Current edition approved Oct. 1, 2007. Published November 2007. Originally
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approvedin1996.Lastpreviouseditionapprovedin2001asD5744-96(2001).DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/D5744-07. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
Theboldfacenumbersinparenthesesrefertothelistofreferencesattheendof Standards volume information, refer to the standard’s Document Summary page on
this standard. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5744–07
D2234/
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D5744–96 (Reapproved 2001) Designation: D 5744 – 07
Standard Test Method for
AcceleratedLaboratory Weathering of Solid Materials Using
1
a Modified Humidity Cell
This standard is issued under the fixed designation D5744; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1This test method covers a procedure that accelerates the natural weathering rate of a solid material sample so that diagnostic
weathering products can be produced, collected, and quantified. Soluble weathering products are mobilized by a fixed-volume
aqueous leach that is performed, collected, and analyzed weekly.When conducted in accordance with the following protocol, this
laboratory test method has accelerated metal-mine waste-rock weathering rates by at least an order of magnitude greater than
observed field rates
1.1 This kinetic test method covers a laboratory weathering procedure that (1) enhances reaction-product transport in the
aqueous leach of a solid material sample of specified mass, and (2) measures rates of weathering-product mass release. Soluble
weathering products are mobilized by a fixed-volume aqueous leach that is performed and collected weekly. Leachate samples are
analyzed for pH, alkalinity/acidity, specific conductance, sulfate, and other selected analytes.
1.1.1 This test method is intended for use to meet kinetic testing regulatory requirements for mining waste rock and ores sized
to pass a 6.3-mm (0.25-in.) Tyler screen.
1.1.2 Interlaboratory testing of this method has been confined to mine waste rock. Application of this test method to
metallurgical-processing waste (for example, mill tailings) is outside the scope of the test method.
2
1.2 This test method is a modification of a laboratory weathering procedure developed originally for mining wastes (1)1-3) .
1.1.1This test method is intended for use to meet kinetic testing regulatory requirements for mining waste and ores.
1.2This test method is a modification of an accelerated weathering test method developed originally for mining wastes (2-4) .
However, it may have useful application wherever gaseous oxidation coupled with aqueous leaching are important mechanisms
for contaminant mobility.
1.3This test method calls for the weekly leaching of a 1000-g solid material sample, with water of a specified purity, and the
collectionandchemicalcharacterizationoftheresultingleachateoveraminimumperiodof20weeks.However,itmayhaveuseful
application wherever gaseous oxidation coupled with aqueous leaching are important mechanisms for contaminant mobility.
1.3 Thistestmethodcallsfortheweeklyleachingofawell-characterizedsolidmaterialsample(weighingatleast1000-g),with
water of specified purity, and the collection and chemical characterization of the resulting leachate.Test duration is determined by
the user’s objectives of the test.
1.4 Asdescribed,thistestmethodmaynotbesuitableforsomematerialscontainingplastics,polymers,orrefinedmetals.These
materials may be resistant to traditional particle size reduction methods.
1.5 Additionally, this test method has not been tested for applicability to organic substances and volatile matter.
1.6 This test method is not intended to provide leachates that are identical to the actual leachate produced from a solid material
in the field or to produce leachates to be used as the sole basis of engineering design.
1.7This1.7 This test method is not intended to simulate site-specific leaching conditions. It has not been demonstrated to
simulate actual disposal site leaching conditions. Furthermore, the test is not designed to produce effluents that are in chemical
equilibrium with the solid phase sample.
1.8 Thistestmethodisintendedtodescribetheprocedureforperformingtheacceleratedlaboratoryweatheringofsolidmaterials
to generate leachates. It does not describe all types of sampling and analytical requirements that may be associated with its
application.
1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.10 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD34onWasteManagementandisthedirectresponsibilityofSubcommitteeD34.01.04onWasteLeaching
Techniques.
Curre
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