1.1 This test method covers the determination of the relative activation level of remnant carbon present in coal fly ash by measuring the adsorption of iodine from aqueous solution. The mass of iodine adsorbed (in milligrams) by 1 g of carbon using test conditions listed herein is called the iodine number. 1.2 The units stated in SI are to be regarded as the 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 to use. Specific hazard statements are given in Section 8.

Keywords

Rationale

The purpose of this test method is to assess quantitatively the adsorption capacity of a specific coal fly ash for a standard aqueous solution of iodine. Determination of the adsorption capacity is accomplished by establishing the adsorption isotherm for the combination of materials being assessed. The isotherm is a plot of iodine adsorbed versus the initial bulk concentration of iodine in the test solution. The adsorption capacity is expressed in units of g iodine/kg ash.

The title and scope are in draft form and are under development within this ASTM Committee.