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Description of ASTM-D4646 2008ASTM D4646 - 03(2008)Standard Test Method for 24-h Batch-Type Measurement of Contaminant Sorption by Soils and SedimentsActive Standard ASTM D4646 | Developed by Subcommittee: D34.01.04 Book of Standards Volume: 11.04 ASTM D4646Significance and Use This test method is meant to allow for a rapid (24 h) index of a geomedia's sorption affinity for given chemicals or leachate constituents. A large number of samples may be run using this test method to determine a comparative ranking of those samples, based upon the amount of solute sorbed by the geomedia, or by various geomedia or leachate constituents. The 24-h time is used to make the test convenient and also to minimize microbial degradation which may be a problem in longer-timed procedures. While K d values are directly applicable for screening and comparative ranking purposes, their use in predictive field applications generally requires the assumption that K d be a fixed value. While this test method may be useful in determining 24-h K d values for nonvolatile organic constituents, interlaboratory testing has been carried out only for the nonvolatile inorganic species, arsenic and cadmium. However, the procedure has been tested for single laboratory precision with polychlorinated biphenyls (PCBs) and is believed to be useful for all stable and nonvolatile inorganic, and organic constituents. This test method is not considered appropriate for volatile constituents. The 24-h time limit may be sufficient to reach a steady-state K d . However, to report this determination as a steady-state K d , this test method should be conducted for intermediate times (for example, 12, 18 and 22 h) to ensure that the soluble concentrations in the solution have reached a steady state by 24 h. Refer to Test Method D 4319 for an alternate procedure of longer duration. 1. Scope 1.1 This test method describes a procedure for determining the sorption affinity of waste solutes by unconsolidated geologic material in aqueous suspension. The waste solute may be derived from a variety of sources such as wells, underdrain systems, or laboratory solutions such as those produced by waste extraction tests like the Test Method D 3987 shake extraction method. 1.2 This test method is applicable in screening and providing relative rankings of a large number of geomedia samples for their sorption affinity in aqueous leachate/geomedia suspensions. This test method may not exactly simulate sorption characteristics that would occur in unperturbed geologic settings. 1.3 While this procedure may be applicable to both organic and inorganic constituents, care must be taken with respect to the stability of the particular constituents and their possible losses from solution by such processes as degradation by microbes, light, or hydrolysis. This test method should not be used for volatile chemical constituents (see 6.1). 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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.
ASTM Standards D1129 Terminology Relating to Water D1193 Specification for Reagent Water D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass D3987 Test Method for Shake Extraction of Solid Waste with Water D4319 Test Method for Distribution Ratios by the Short-Term Batch Method Keywords Organic compounds--water; Oxidation-reduction potential (ORP); Physicochemical processes; PCBs (polychlorinated biphenyls); Photodegradation; Resource recovery; Rotary solid waste extractor; Sediment toxicity testing; Soil; Solute sorption; Sorption capacity/rate; Steady-state bioconcentration; Time tests; Twenty-four hour testing; Underdrain systems; Volatility; Contamination--environmental; Distribution; Municipal solid waste (MSW); Geomedia sorption; Hazard assessment/potential; Hydrolysis; Nonvolatile matter content--waste materials; Inorganic compounds--water; Leachates/leaching; Oil contamination--ecological considerations in oil spill response; Marine environments; Microbiological examination; Absorption--soil/rock; Accelerated aging/testing; Biological data analysis--sediments; Breaking strength/tenacity; Chemical analysis--waste; Chemical analysis--water applications; Chemical-resistant materials/products; Chemicals (environmental analysis); Containment systems/applications; Wastewater testing/treatment; Wells; ICS Code ICS Number Code 13.080.05 (Examination of soil in general) DOI: 10.1520/D4646-03R08 ASTM International is a member of CrossRef. ASTM D4646This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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