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1、AAbsorption-Theholdingofasubstancewithinasolidbycohesiveorcapillaryforces.Accumulator-Apulsationdampenerinstalledonthesuctionand/ordischargelinesofpumps,generallyplungertype,tominimizepressuresurgesandprovideuniformityofflow.Accuracy-Theclosenessofagreementbetweenanobserv
2、edvalueandanacceptedreferencevalue.Whereanacceptedreferencevalueisnotavailable,ameasureofthedegreeofconformityofavaluegeneratedbyaspecificproceduretotheassumedoracceptedtruevalue,andincludesbothprecisionandbias.Acetylation-Substitutionofanacetylradicalforanactivehydrogen.
3、Specifically,formationofcelluloseacetatefromcellulose.Acidity-Thequantitativecapacityofaqueousmediatoreactwithhydroxylions.ActivatedCarbon-Granulatedorpowderedactivatedcarbonusedtoremovetastes,odor,chlorine,chloramines,andsomeorganicsfromwater.Afamilyofcarbonaceoussubstan
4、cesmanufacturedbyprocessesthatdevelopadsorptiveproperties.Adsorption-Theholdingofasubstanceontothesurfaceofasolidbychemicalsurfaceforces,withoutformingnewchemicalbonds.AerobicBacteria-Bacteriathatrequireoxygenforgrowth,seeBacteria,aerobes.Aggregate-Granularmaterialsuchass
5、and,gravel,crushedstone.AirScour-Distributingairovertheentirefilterareaatthebottomofafiltermediaflowingupwardtoimprovetheeffectivenessofbackwashingand/ortopermittheuseoflowerbackwashwaterflowrate.Algae-Anyofagroupofchieflyaquaticmonocellularplantswithchlorophylloftenmaske
6、dbyabrownorredpigment.Alkalinity-Thequantitativecapacityofaqueousmediatoreactwithhydrogenions."M"alkalinityisthatwhichwillreactwithacidasthepHofthesampleisreducedtothemethylorangeendpointabout4.5."P"alkalinityisthatwhichreactswithacidasthepHofthesampleisreducedtothephenol
7、phthaleinendpointof8.3."M"isthetotalalkalinitywhichisthesumofhydroxidepluscarbonateplusbicarbonatecontents;"P"includesallthehydroxylandhalfthecarbonatecontent.Alum-Aluminumsulfate,Al2(SO4)3XH2O(X=14-18),acoagulant.AmbientTemperature-Thetemperatureofthesurroundings,typical
8、ly20o-25oC.Amorphous-Noncrystalline,devoidofregularcohesivestructure.AnaerobicBacteria-Bacteriat
