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dc.contributor.advisorCroue, Jean-Philippe
dc.contributor.authorMaugin, Thomas
dc.date.accessioned2014-01-15T12:03:02Z
dc.date.available2014-12-14T00:00:00Z
dc.date.issued2013-12
dc.identifier.doi10.25781/KAUST-Z985M
dc.identifier.urihttp://hdl.handle.net/10754/311371
dc.description.abstractProviding pretreatment prior RO filtration is essential to avoid biofouling and subsequent loss of membrane performances. Chlorine is known to degrade polymeric membrane, improving or reducing membrane efficiency depending on oxidation conditions. This study aimed to assess the impact of alternative disinfectant, NH2Cl, as well as secondary oxidants formed during chloramination of seawater, e.g. HOBr, HOI, or used in water treatment e.g. ClO2, O3, on membrane structure and performances. Permeability, total and specific rejection (Cl-, SO4 2-, Br-, Boron), FTIR profile, elemental composition were analyzed. Results showed that each oxidant seems to react differently with the membrane. HOCl, HOBr, ClO2 and O3 improved membrane permeability but decreased rejection in different extent. In comparison, chloramines resulted in identical trends but oxidized membrane very slowly. On the contrary, iodine improved membrane rejection e.g. boron, but decreased permeability. Reaction conducted with chlorine, bromine, iodine and chloramines resulted in the incorporation of halogen in the membrane structure. All oxidant except iodine were able to break amide bonds of the membrane structure in our condition. In addition, chloramine seemed to react with membrane differently, involving a potential addition of nitrogen. Chloramination of seawater amplified membrane performances evolutions due to generation of bromochloramine. Moreover, chloramines reacted both with NOM and membrane during oxidation in natural seawater, leading to additional rejection drop.
dc.language.isoen
dc.subjectMembrane
dc.subjectOxidant
dc.subjectPolyamide
dc.subjectAgeing
dc.subjectMonochloramine
dc.titleFATE OF REVERSE OSMOSIS (RO) MEMBRANES DURING OXIDATION BY DISINFECTANTS USED IN WATER TREATMENT: IMPACT ON MEMBRANE STRUCTURE AND PERFORMANCES
dc.typeDissertation
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.rights.embargodate2014-12-14
thesis.degree.grantorKing Abdullah University of Science and Technology
dc.contributor.committeememberAmy, Gary L.
dc.contributor.committeememberMarinas, Benito
dc.contributor.committeememberPeinemann, Klaus-Viktor
thesis.degree.disciplineEnvironmental Science and Engineering
thesis.degree.nameDoctor of Philosophy
dc.rights.accessrightsAt the time of archiving, the student author of this dissertation opted to temporarily restrict access to it. The full text of this dissertation became available to the public after the expiration of the embargo on 2014-12-14.
refterms.dateFOA2014-12-14T00:00:00Z


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