ASTM D5919-96(2001)

Standard Practice for Determination of Adsorptive Capacity of Activated Carbon by a Micro-Isotherm Technique for Adsorbates at ppb Concentrations

SCOPE
1.1 This practice covers the assessment of activated carbon for the removal of low concentrations of adsorbable constituents from water and wastewater using the bottle point isotherm technique. It can be used to characterize the adsorptive properties of virgin and reactivated activated carbons.  
1.2 This practice can be used in systems with constituent concentrations in the low milligrams per litre or micrograms per litre concentration ranges.  
1.3 This practice can be used to determine the adsorptive capacity of and Freundlich constants for volatile organic compounds provided the handling procedures described in this practice are followed carefully.  
1.4 The following safety caveat applies to the procedure section of this practice: 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.

General Information

• Status: Historical
• Publication Date: 09-Mar-1996
• ICS: 13.030.40 - Installations and equipment for waste disposal and treatment
• ICS: 13.060.30 - Sewage water
• Technical Committee: D28 - Activated Carbon
• Drafting Committee: D28.02 - Liquid Phase Evaluation

Relations

• Replaces: ASTM D5919-96 - Standard Practice for Determination of Adsorptive Capacity of Activated Carbon by a Micro-Isotherm Technique for Adsorbates at ppb Concentrations
• Effective Date: 10-Mar-1996
• Replaced By: ASTM D5919-96(2006) - Standard Practice for Determination of Adsorptive Capacity of Activated Carbon by a Micro-Isotherm Technique for Adsorbates at ppb Concentrations
• Effective Date: 01-Oct-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D 5919–96 (Reapproved 2001)
Standard Practice for
Determination of Adsorptive Capacity of Activated Carbon
by a Micro-Isotherm Technique for Adsorbates at ppb
1
Concentrations
This standard is issued under the fixed designation D 5919; 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 3.1.2 Fordefinitionsoftermsusedinthispracticerelatingto
water, refer to Terminology D1129.
1.1 This practice covers the assessment of activated carbon
for the removal of low concentrations of adsorbable constitu-
4. Summary of Practice
entsfromwaterandwastewaterusingthebottlepointisotherm
4.1 This practice consists of the determination of the ad-
technique. It can be used to characterize the adsorptive
sorptive capacity of activated carbon for adsorbable constitu-
properties of virgin and reactivated activated carbons.
ents by contacting the aqueous solution contained in an
1.2 This practice can be used in systems with constituent
essentially zero head space container with activated carbon,
concentrations in the low milligrams per litre or micrograms
determining the amount of the constituents removed, and
per litre concentration ranges.
calculating the adsorptive capacity and the Freundlich con-
1.3 This practice can be used to determine the adsorptive
stants, K and 1/n, from a Freundlich isotherm plot.
capacity of and Freundlich constants for volatile organic
4.1.1 The weights of activated carbon used in this practice
compounds provided the handling procedures described in this
may have to be adjusted to achieve reasonable levels of
practice are followed carefully.
removal of the constituent. The best data is obtained when
1.4 The following safety caveat applies to the procedure
carbondosagesareselectedthatresultinnomorethan90%or
section of this practice: This standard does not purport to
nolessthan10%oftheadsorbableconstituentsbeingremoved
address all of the safety concerns, if any, associated with its
from the water by the carbon.
use. It is the responsibility of the user of this standard to
4.1.2 If carbon dosages used are less than 1 mg, larger
establish appropriate safety and health practices and deter-
volumes of the aqueous solution may be used, such as 1000
mine the applicability of regulatory limitations prior to use.
mL.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
2 5.1 This practice allows the adsorption capacity at equilib-
D1129 Terminology Relating to Water
2 riumofanactivatedcarbonforadsorbableconstituentspresent
D1193 Specification for Reagent Water
in water to be determined.The Freundlich K and 1/n constants
D3370 Practices for Sampling Water from Closed Con-
2 that can be calculated based upon information collected using
duits
3 this practice can be used to estimate carbon loading capacities
D2652 Terminology Relating to Activated Carbon
3 andusagesratesfortheconstituentpresentinawaterstreamat
D2867 Test Method for Moisture in Activated Carbon
other concentrations.
3. Terminology
6. Interferences
3.1 Definitions:
6.1 The water shall not contain any nondissolved compo-
3.1.1 Fordefinitionsoftermsusedinthispracticerelatingto
nents.
activated carbon, refer to Terminology D2652.
6.2 The presence of naturally occurring organic compounds
such as humic acids in the water being studied may signifi-
1
cantly affect the ability of the carbon to adsorb the constituent
This practice is under the jurisdiction of ASTM Committee D28 on Activated
Carbon and is the direct responsibility of Subcommittee D28.02 on Liquid Phase
of interest. Results obtained when using water other than
Evaluation.
reagent grade water may be unique for the particular water
Current edition approved March 10, 1996. Published May 1996.
2 used and it may not be possible to apply these results to other
Annual Book of ASTM Standards, Vol 11.01.
3
Annual Book of ASTM Standards, Vol 15.01. water systems.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D 5919–96 (2001)
6.3 The adsorption isotherm data collected using this prac- 10.3 The bottle is tightly capped and inverted three to five
tice can be affected by the ionic strength, pH and temperature times to mix the contents.
of the water, and the presence and growth of microorganisms. 10.4 Thebottlesarethencentrifugedat2000rpmfor15min
to settle the activated carbon. The supernate is poured off and
7. Apparatus the procedure is repeated until the supernatant is clear.Allow-
ing the mixture to sit for a period of time to allow the carbon
...