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Designation: C 400 – 98 - Quicklime and Hydrated Lime for Neutralization of Waste Acid1

This standard is issued under the fixed designation C 400; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. | Designation C 400 98 Standard Test Methods for Quicklime and Hydrated Lime for Neutralization of Waste Acid1 This standard is issued under the fixed designation c 400 the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This test method covers the testing of quicklime and hydrated lime for use in the treatment of waste acid solutions and includes the characterization of the liming material and of the acid waste. Note 1 When ageccd upon bv the maiiul actincr and the purchaser this method may be used directly to evaluate the lime requirement for a plant waste acid and in the preparation of the lime slurry the pH the time temperature and other conditions of treatment may be adjusted to conform to plant practice. Otherwise the test shall be performed as described in this method. Note 2 Under oome conditiolls ff ksst the lime n c uin n i r t mav vary substantially from that indicated by ultimate chemical analysis or by the use of a determination of available alkalinity by titration to a stoichiometric end point. 1.2 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. 2. Referenced Documents 2.1 ASTM Standards C 50 Methods of Sampling Inspection Packing and Marking of Lime and Limestone Products2 E 70 Test Method for pH of Aqueous Solutions with the Glass Electrode3 3. Terminology 3.1 Definitions 3.1.1 neutralization coeficiem the number off parts off lime required to neutralize one million parts by weight of sulfuric acid solution 1.5 to a pH of 4.4 in 30 min see Note 1 . 3.1.2 pH a measure .