4,4'-diaminostilbene-2,2'-disulfonicacid(DSDacid)manufacturingwastewaterwastreatedbyamacroporousresininafixed-bedcolumn.Theresultsshowedthatthismethodwassuitableforremovalofchemicaloxygendemands(COD)andcolorAbout91%CODand99.5%colorremovalwereobtainedundertheoptimumadsorptionconditions,i.e.temperature20℃,flowrate1bedvolume/hour(BV/hr)andpH1-2.Theresinwasefficientlyregeneratedwithaqueoussodiumhydroxideandwater.Furthermore,65.5%of4,4'-dinitrostilbene-2,2'-disulfonicacid(DNS)couldberecoveredfromwastewaterforpossiblerecyclingtothemanufacturingprocess.Theadsorptioncapacityofresinremainedconstantduringtherepetitionprocessofadsorptionanddesorption.
