Carboxymethyl Cellulose and Titania Composites as Adsorbents

Munasingha Mudiyanselage, Dinushi C. W.

Carboxymethyl Cellulose and Titania Composites as Adsorbents

Munasingha Mudiyanselage, Dinushi C. W.

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Publication Type:: Thesis
Issue Date:: 2023

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Field	Value	Language
dc.contributor.author	Munasingha Mudiyanselage, Dinushi C. W.
dc.date.accessioned	2024-04-16T02:28:19Z
dc.date.available	2024-04-16T02:28:19Z
dc.date.issued	2023
dc.identifier.uri	http://hdl.handle.net/10453/177954
dc.description	University of Technology Sydney. Faculty of Science.	en_US.UTF-8
dc.description.abstract	This thesis seeks to address the critical issue of water pollution caused by industrialisation and urbanisation in a sustainable, cost-effective and environmentally-friendly way through the preparation of a multifunctional adsorbent composite containing carboxymethylcellulose (CMC) and titania. Two methods are explored for titania incorporation, direct and in situ, resulting in stable materials which were evaluated for their adsorption and photocatalytic activity of methylene blue and methyl orange as common dyestuffs. Characterisation of the composites was completed using XRD, XPS, FTIR, SEM, EDX, BET, LCMS and Zeta potential. Each composite method, when optimised for processability, temperature and other conditions, exhibits an excellent stability and photocatalytic degradation efficiency of methylene blue and methyl orange dye under ultraviolet light. Comparing both methods clearly indicated the in situ approach improved both the efficiency of adsorption and photocatalytic activity under direct sunlight towards both cationic and anionic dyes – degrading >96% of the dye within 6 hours. This methodology as then applied to a practical application using a model batik dye wastewater sample where degradation and absorption results followed closely the trend for methylene blue. To round off the research, the degradation products of dyestuffs were identified comprehensively to ensure less harmful species were being produced.	en_US.UTF-8
dc.format	Thesis (PhD)
dc.language.iso	en_US	en_US.UTF-8
dc.relation	https://opus.lib.uts.edu.au/bitstream/10453/177954/1/thesis.pdf
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	The author owns the copyright in this thesis including all reproduction and reuse rights for the work. The work may not be altered without the permission of the copyright owner. Attribution is essential when quoting or paraphrasing from this thesis.
dc.rights	© 2023 Dinushi C. W. Munasingha Mudiyanselage
dc.rights	au.edu.uts.lib/cph
dc.title	Carboxymethyl Cellulose and Titania Composites as Adsorbents	en_US.UTF-8
dc.type	Thesis
utslib.copyright.status	open_access	*

Abstract:

This thesis seeks to address the critical issue of water pollution caused by industrialisation and urbanisation in a sustainable, cost-effective and environmentally-friendly way through the preparation of a multifunctional adsorbent composite containing carboxymethylcellulose (CMC) and titania. Two methods are explored for titania incorporation, direct and in situ, resulting in stable materials which were evaluated for their adsorption and photocatalytic activity of methylene blue and methyl orange as common dyestuffs. Characterisation of the composites was completed using XRD, XPS, FTIR, SEM, EDX, BET, LCMS and Zeta potential. Each composite method, when optimised for processability, temperature and other conditions, exhibits an excellent stability and photocatalytic degradation efficiency of methylene blue and methyl orange dye under ultraviolet light. Comparing both methods clearly indicated the in situ approach improved both the efficiency of adsorption and photocatalytic activity under direct sunlight towards both cationic and anionic dyes – degrading >96% of the dye within 6 hours. This methodology as then applied to a practical application using a model batik dye wastewater sample where degradation and absorption results followed closely the trend for methylene blue. To round off the research, the degradation products of dyestuffs were identified comprehensively to ensure less harmful species were being produced.

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http://hdl.handle.net/10453/177954