1、Designation:D178217Standard Test Methods forOperating Performance of Particulate Cation-ExchangeMaterials1This standard is issued under the fixed designation D1782;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of theoperating capacity of particulate cation-exchange materialswhen used for the remova
3、l of calcium,magnesium,and sodiumions from water.It is intended for use in testing both new andused materials.The following two test methods are included:SectionsTest Method ASodium Cycle8 to 14Test Method BHydrogen Cycle15 to 211.2 The values stated in SI units are to be regarded asstandard.The val
4、ues given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard
5、 to establish appro-priate safety,health and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Prin
6、ciples for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1067 Test Methods for Acidity or Alkalinity of WaterD1126 Test Method for Hardness in WaterD1129
7、 Terminology Relating to WaterD1193 Specification for Reagent WaterD2687 Practices for Sampling Particulate Ion-Exchange Ma-terials3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in these standards,referto Terminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 Ce
8、rtain terms in these standards that relate specificallyto ion exchange are defined as follows:3.2.2 free mineral aciditythe quantitative capacity ofaqueous media to react with hydroxyl ions to pH 4.3.3.2.3hydrogen cyclethe operation of a cation-exchangecycle wherein the removal of specified cations
9、from influentwater is accomplished by exchange with an equivalent amountof hydrogen ion from the exchange material.3.2.4 theoretical free mineral aciditythe free mineral acid-ity that would result from the conversion of the anions ofstrong acids in solution to their respective free acids.4.Summary o
10、f Test Methods4.1 Test Method A consists of repeated cycles of backwash,brine regeneration,rinse,and exhaustion of the sample in theform of a bed in a transparent column.The exhausting mediumused is an ion-exchange test water.4.2 Test Method B consists of repeated cycles of backwash,acid regeneratio
11、n,rinse,and exhaustion of the sample in theform of a bed in a transparent column.The exhausting mediumused is an ion-exchange test water.5.Apparatus5.1 Test Assemble(see Fig.1),consisting of the following:5.1.1 Column,transparent,vertically supported,25.4 6 2.5mm(1.0 6 0.1 in.)in inside diameter and
12、 approximately 1500mm(60 in.)long.The bottom of the column shall be closed andprovided with an outlet of approximately 6-mm inside diam-eter.Connections shall be provided at top and bottom foradmission and removal of solutions as described in Section 10.Adequate means for measuring and regulating fl
13、ow shall beprovided.Calibrate the column in such a manner that thevolume readings required by the test method can be made.Make all measurements at 25 6 5C.5.1.2 Support,for the sample,so designed that the distancefrom the sample to the column outlet is at least 50 mm.A1These test methods are under t
14、he jurisdiction of ASTM Committee D19 onWater and are the direct responsibility of Subcommittee D19.08 on Membranes andIon Exchange Materials.Current edition approved Aug.1,2017.Published August 2017.Originallyapproved in 1960.Last previous edition approved in 2009 as D1782 95(2009).DOI:10.1520/D178
15、2-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C70
16、0,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 suggested supporting bed utilizes quartz,glass beads,or othermaterial 1.5 to 3.5 mm in diameter,insoluble in the reagentsused,and retaine
