ASTM D3860-98(R2020) pdf free download
ASTM D3860-98(R2020) pdf free download.Standard Practice for Determination of Adsorptive Capacity of Activated Carbon by Aqueous Phase Isotherm Technique
1. Scope
1.1 This practice covers the determination of the adsorptive capacity ofactivated carbon to remove undesirable constituents from water and waste water. It can be used to evaluate the adsorptive capacity of activated or reactivated carbon. 1.2 This practice is not recommended unless special precau- tions are taken to reduce loss during sample preparation and analysis. 1.3 This practice is recommended to determine the adsorp- tive capacity ofactivated carbon for the following applications, but is not limited to these applications: 1.3.1 Removal of color from dye mill waste water, 1.3.2 Removal of taste or odor constituents, or both, from potable waters, 1.3.3 Removal of toxicants from water, 1.3.4 Removal of surface-active agents from water, 1.3.5 Removal of BOD 5 from sanitary waste waters, and 1.3.6 Removal of TOC from industrial waste waters. 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.6 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions: 3.1.1 For definitions ofterms used in this practice relating to activated carbon, refer to Terminology D2652. 3.1.2 For definition of terms used in this practice relating to water, refer to Terminology D1129.
4. Summary of Practice
4.1 This practice consists of the determination of the ad- sorptive capacity of activated carbon for adsorbable constitu- ents by contacting the aqueous solution with activated carbon, determining the amount of the constituents removed, and calculating the adsorptive capacity from a Freundlich isotherm plot. 4.1.1 Sample weights of activated carbon may have to be adjusted, depending on the concentration of adsorbable con- stituents in the water.
5. Significance and Use
5.1 This practice is used when activated carbon is consid- ered as an adsorbent in treating water. Since both granular and powdered activated carbons are commercially available, a standard practice is needed to ensure that the activated carbons are evaluated under the same test conditions. Specified particle size carbon is to be used to ensure that the same test conditions are used. The practice is generally performed at 20 °C; however, other temperatures may be used and noted.
6. Interferences
6.1 The water sample must not contain any immiscible oil. 6.2 Generally, membrane filters contain a slight amount of leachable surfactants and wetting agents that might be a source of detectable error in waters having low concentrations of adsorbable constituents.
7. Apparatus
7.1 Agitator, able to keep slurried activated carbon in suspension. N OTE 1—A wrist-action shaker or a magnetic stirrer is suitable as an agitator. 7.2 Grinding Mill, capable ofgrinding material so that 95 % passes through a 325-mesh sieve. 7.3 Vacuum or Pressure-Filtration Apparatus. 7.4 Membrane Filters, 0.40 to 0.45 µm. 7.5 Erlenmeyer Flasks, glass stoppered, 500-mL and 1000-mL capacity. 7.6 Analytical Balance, capable of weighing to the nearest 0.1 mg. 7.7 Oven, forced-air circulation, capable of temperature regulation between 145 and 155 °C. 7.8 Constant-Temperature Water Bath, capable of tempera- ture regulation of 20 6 1 °C. 7.9 Pipet, 100 mL.
