Polytitanium sulfate (PTS): Coagulation application and Ti species detection

Zhao, Y; Phuntsho, S; Gao, B; Shon, H

Polytitanium sulfate (PTS): Coagulation application and Ti species detection

Zhao, Y Phuntsho, S

Gao, B

Shon, H

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Publication Type:: Journal Article
Citation:: Journal of Environmental Sciences (China), 2017, 52 pp. 250 - 258
Issue Date:: 2017-02-01

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Field	Value	Language
dc.contributor.author	Zhao, Y	en_US
dc.contributor.author	Phuntsho, S https://orcid.org/0000-0002-3917-3916	en_US
dc.contributor.author	Gao, B https://orcid.org/0000-0003-1728-8242	en_US
dc.contributor.author	Shon, H https://orcid.org/0000-0002-3777-7169	en_US
dc.date.available	2016-04-20	en_US
dc.date.issued	2017-02-01	en_US
dc.identifier.citation	Journal of Environmental Sciences (China), 2017, 52 pp. 250 - 258	en_US
dc.identifier.issn	1001-0742	en_US
dc.identifier.uri	http://hdl.handle.net/10453/44108
dc.description.abstract	© 2016 Interest in the development of inorganic polymerized coagulants is growing; however, there are only limited studies on the synthesis of polytitanium coagulants, which are expected to exhibit improved coagulation efficiency with better floc properties. This study presents the synthesis of polytitanium sulfate (PTS) for potential application in water purification, followed by characterization of PTS flocs and titanium species detection. Stable PTS solutions were successfully synthesized and standard jar tests were conducted to evaluate their coagulation efficiency. Electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) speciation analysis revealed that a variety of mononuclear and polynuclear complexes were formed in PTS solution, indicating the polymeric nature of the synthesized coagulant. Floc characteristics were studied through on-line monitoring of floc size using a laser diffraction particle size analyzer. Results showed that PTS had a comparable or in some cases even higher organic matter and particulate removal efficiency than Ti(SO4)2. The effluent pH after PTS coagulation significantly improved toward desirable values closer to neutral pH. Properties of flocs formed by PTS were significantly improved in terms of floc size, growth rate and structure. This study showed that PTS could be an efficient and promising coagulant for water purification, with the additional benefit that its coagulated sludge can be used to recover valuable TiO2 nanoparticles for various commercial applications.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP130103129
dc.relation.ispartof	Journal of Environmental Sciences (China)	en_US
dc.relation.isbasedon	10.1016/j.jes.2016.04.008	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Sulfates	en_US
dc.subject.mesh	Titanium	en_US
dc.subject.mesh	Waste Disposal, Fluid	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Flocculation	en_US
dc.subject.mesh	Nanoparticles	en_US
dc.title	Polytitanium sulfate (PTS): Coagulation application and Ti species detection	en_US
dc.type	Journal Article
utslib.citation.volume	52	en_US
utslib.for	0501 Ecological Applications	en_US
utslib.for	0401 Atmospheric Sciences	en_US
utslib.for	0301 Analytical Chemistry	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	04 Earth Sciences	en_US
utslib.for	05 Environmental Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access
pubs.publication-status	Published	en_US
pubs.volume	52	en_US

Abstract:

© 2016 Interest in the development of inorganic polymerized coagulants is growing; however, there are only limited studies on the synthesis of polytitanium coagulants, which are expected to exhibit improved coagulation efficiency with better floc properties. This study presents the synthesis of polytitanium sulfate (PTS) for potential application in water purification, followed by characterization of PTS flocs and titanium species detection. Stable PTS solutions were successfully synthesized and standard jar tests were conducted to evaluate their coagulation efficiency. Electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) speciation analysis revealed that a variety of mononuclear and polynuclear complexes were formed in PTS solution, indicating the polymeric nature of the synthesized coagulant. Floc characteristics were studied through on-line monitoring of floc size using a laser diffraction particle size analyzer. Results showed that PTS had a comparable or in some cases even higher organic matter and particulate removal efficiency than Ti(SO4)2. The effluent pH after PTS coagulation significantly improved toward desirable values closer to neutral pH. Properties of flocs formed by PTS were significantly improved in terms of floc size, growth rate and structure. This study showed that PTS could be an efficient and promising coagulant for water purification, with the additional benefit that its coagulated sludge can be used to recover valuable TiO2 nanoparticles for various commercial applications.

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http://hdl.handle.net/10453/44108