dc.contributor.authorYoosefi Booshehri, Amin
dc.date.accessioned2015-06-11T02:54:13Z
dc.date.accessioned2017-07-23T08:26:15Z
dc.date.available2015-06-11T02:54:13Z
dc.date.available2017-07-23T08:26:15Z
dc.date.copyright2015en_US
dc.date.issued2015
dc.identifier.citationYoosefi Booshehri, A. (2015). Nanocomposites for disinfection of drinking water; toward point-of-use water treatment systems. Doctoral thesis, Nanyang Technological University, Singapore.
dc.identifier.urihttp://hdl.handle.net/10356/65042
dc.description.abstractThe ever increasing standards for providing clean water have put more stress on water disinfection and decontamination technologies. Besides the higher standards, population growth, lack of infrastructures and distribution issues are the other main sources of stress. To address these issues, reliable methods of water treatment are needed that can be used in the decentralized systems. Advances in fabrication and engineering of nanomaterials have opened a new horizon in water treatment systems, especially with a point-of-use applicability and decentralization. Using nanomaterial, unlike traditional methods of water disinfection does not introduce any other secondary contamination and they can also be used in different scales. But the nanoparticles are needed to be removed from the treated water effectively and completely or not release to the water in the first place by being anchored on a support. In this study we focus on development of nanocomposite materials that can be used in point-of-use systems for water disinfection. Firstly, well dispersed silver deposited multiwall carbon nanotubes were produced. The nanocomposite was then attached on the surface of the hollow fiber membrane by simple method of filtration. This method of deposition of the nanocomposite has a couple of advantages over other chemical methods used in previous studies. Firstly, the structure and composition of the membrane remains intact. Secondly, after depletion of silver in the nanocomposite, it can be detached very easily and regenerated. Secondly, in view that silver is a noble and relatively expensive material and also the strict regulations on its release to the environment, copper oxide applicability was studied to substitute silver. In this part, CuO nanoleaves were produced and deposited on different substrates to be a simple and reliable means of water disinfection. In the first two parts of this study, leached metal ions are the first cause of disinfection. But in the third part, system was improved for better water quality without any metallic ions by using photocatalytic process. In this part silver deposited bismuth vanadate was used as the photocatalyst. The nanocomposite was used in a suspension and its antibacterial activity was studied under visible light irradiation. And finally in the last part of this study, photocatalytic polymer composite was fabricated by dispersing the photocatalyst in the polymer matrix. The resulted composite sheet showed a promising antibacterial activity for water treatment. In summary this thesis is devoted to development of low cost, reliable, efficient and stable water treatment system with a point-of-use applicability.en_US
dc.format.extent146 p.en_US
dc.language.isoenen_US
dc.subjectDRNTU::Engineering::Environmental engineering::Water treatmenten_US
dc.subjectDRNTU::Engineering::Nanotechnologyen_US
dc.titleNanocomposites for disinfection of drinking water ; toward point-of-use water treatment systemsen_US
dc.typeThesis
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.contributor.supervisorWang Rong
dc.contributor.supervisorXu Rongen_US
dc.description.degreeDOCTOR OF PHILOSOPHY (SCBE)en_US


Files in this item

FilesSizeFormatView
Nanocompositea ... ater treatment systems.pdf5.998Mbapplication/pdfView/Open

This item appears in the following Collection(s)

Show simple item record