Solventimpregnatedresinsarepromisingfortheremovalofpolarorganiccompoundsfromaqueous streams, buthavelowmass-transferrates.
Athoroughunderstandingofthephenomenaoccurringinside the oresofthesolventimpregnatedresinisthereforerequired.Inthisstudyamathematicalmodelwas
developed todesc
...
Solventimpregnatedresinsarepromisingfortheremovalofpolarorganiccompoundsfromaqueous streams, buthavelowmass-transferrates.
Athoroughunderstandingofthephenomenaoccurringinside the oresofthesolventimpregnatedresinisthereforerequired.Inthisstudyamathematicalmodelwas
developed todescribethesimultaneousdiffusionandreaction.Thediffusionwasdescribedusingthe
Maxwell¿Stefanapproachtowardsmulti-componentdiffusionandincludedthevolume-expansionof
the organicphase.Themodelwasvalidatedusingexperimentaldatafromtheliteratureonthe
extractionofphenolbyCyanex923impregnatedinmacro-porouspolypropylene.Themodeldescribed
the experimentaldataasfunctionoftemperatureandinitialconcentrationaccuratelywithan R240.96
and aregressedreactionrateconstantwithaconfidence intervalof 76%. Analysisofthemodelresults
revealedthatmulti-componenteffectsasdescribedbytheMaxwell¿Stefanmodelwereoflimited
importance whereasthevolumeexpansionwasessentialtoaccuratelydescribetheexperimentaldata.@en
