Ion exchange resins an functional fibres: a comparative study for the treatment of brine waste water

dc.contributor.advisorPetrik, Leslie
dc.contributor.authorYalala, Bongani Ndhlovu
dc.contributor.otherDept. of Chemistry
dc.contributor.otherFaculty of Science
dc.date.accessioned2013-10-24T08:56:26Z
dc.date.accessioned2024-05-09T10:50:08Z
dc.date.available2011/02/22 09:14
dc.date.available2011/02/22
dc.date.available2013-10-24T08:56:26Z
dc.date.available2024-05-09T10:50:08Z
dc.date.issued2009
dc.descriptionMagister Scientiae - MScen_US
dc.description.abstractTo improve the adsorption capacity of polyacrylonitrile (PAN) fibres, hydrophilic amidoxime fibres were prepared by subsequent conversion of the cyano groups to an amidoxime group by reacting with hydroxylamine at 80°C at an optimum amidoximation time of 2 hrs. The amidoxime fibre was hydrolyzed/alkali treated in a solution of sodium hydroxide to enhance or improve the adsorption properties. This was followed by characterization of the amidoxime and hydrolyzed fibres using Scanning electron microscopy (SEM); Fourier transform Infrared Spectroscopy (FTIR) and exchange capacity (cationic and anionic). SEM showed that the hydrolysis process made the surface of Amidoxime fibre rougher than that of Polyacrylonitrile fibre. FTIR revealed that the hydrolyzed Amidoxime fibres contained conjugated imine (-C=N-) sequences. Functionalization enhanced the sorption of amidoxime fibres by an increase of 20 % in the cationic exchange capacity. This was achieved by the part conversion of the cyano groups into the carboxylic acid groups. The fibres showed faster kinetics largely due the available exchange sites on the surface of the fibres hence the equilibration was achieved much quicker.en_US
dc.description.countrySouth Africa
dc.identifier.urihttps://hdl.handle.net/10566/14481
dc.language.isoenen_US
dc.publisherUniversity of the Western Capeen_US
dc.rights.holderUniversity of the Western Capeen_US
dc.subjectAmberlite 252 RFHen_US
dc.subjectAmidoxime-modified polyacrylonitrileen_US
dc.subjectAdsorptionen_US
dc.subjectAdsorption isothermsen_US
dc.subjectAdsorption kineticsen_US
dc.subjectBrineen_US
dc.subjectCalciumen_US
dc.subjectCopperen_US
dc.subjectFreundlich isothermsen_US
dc.subjectIon exchangeen_US
dc.subjectLangmuir isothermsen_US
dc.subjectMagnesiumen_US
dc.subjectPolyacrylonitrile (PAN)en_US
dc.subjectPseudo-first order rate expressionen_US
dc.subjectPseudo-second order rate expressionen_US
dc.subjectSodiumen_US
dc.titleIon exchange resins an functional fibres: a comparative study for the treatment of brine waste wateren_US
dc.typeThesisen_US

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