Preparation and characterization of novel polytitanium tetrachloride coagulant for water purification

Zhao, YX; Phuntsho, S; Gao, BY; Huang, X; Qi, QB; Yue, QY; Wang, Y; Kim, JH; Shon, HK

Preparation and characterization of novel polytitanium tetrachloride coagulant for water purification

Zhao, YX Phuntsho, S

Gao, BY Huang, X Qi, QB Yue, QY Wang, Y Kim, JH Shon, HK

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Publication Type:: Journal Article
Citation:: Environmental Science and Technology, 2013, 47 (22), pp. 12966 - 12975
Issue Date:: 2013-11-19

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Field	Value	Language
dc.contributor.author	Zhao, YX	en_US
dc.contributor.author	Phuntsho, S https://orcid.org/0000-0002-3917-3916	en_US
dc.contributor.author	Gao, BY	en_US
dc.contributor.author	Huang, X	en_US
dc.contributor.author	Qi, QB	en_US
dc.contributor.author	Yue, QY	en_US
dc.contributor.author	Wang, Y	en_US
dc.contributor.author	Kim, JH	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.date.issued	2013-11-19	en_US
dc.identifier.citation	Environmental Science and Technology, 2013, 47 (22), pp. 12966 - 12975	en_US
dc.identifier.issn	0013-936X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/26680
dc.description.abstract	Polymeric metal coagulants are increasingly being used to improve coagulation efficiency, yet the research on the development of titanium and particularly polytitanium salts remains limited. This study is the first attempt in the synthesis, characterization, and application of polytitanium salts as coagulants. Polytitanium tetrachloride (PTC) solutions with different basicity values B (OH/Ti molar ratio) were prepared using a slow alkaline titration method. Jar tests were conducted to assess coagulation performance using both synthetic and real raw water samples, and the floc characteristics were monitored online using a laser diffraction particle size analyzer. Electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) was utilized to identify various Ti species, with the results providing strong evidence of the presence of various hydrolyzed Ti species in the titanium aqueous phase. Compared to titanium tetrachloride (TiCl4), higher or comparable turbidity and organic matter removal efficiency could be achieved by PTC with improved floc characteristics in terms of size, growth rate, and structure. Besides, the water pH after PTC coagulation was significantly improved toward neutral pH. This study indicates that PTC is an effective and promising coagulant for water purification. Besides, the PTC flocculated sludge was able to recycle and produce functional TiO2 photocatalyst. © 2013 American Chemical Society.	en_US
dc.relation.ispartof	Environmental Science and Technology	en_US
dc.relation.isbasedon	10.1021/es402708v	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Titanium	en_US
dc.subject.mesh	Water	en_US
dc.subject.mesh	Polymers	en_US
dc.subject.mesh	Solutions	en_US
dc.subject.mesh	X-Ray Diffraction	en_US
dc.subject.mesh	Spectrometry, Mass, Electrospray Ionization	en_US
dc.subject.mesh	Rivers	en_US
dc.subject.mesh	Sewage	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Flocculation	en_US
dc.subject.mesh	Fractals	en_US
dc.title	Preparation and characterization of novel polytitanium tetrachloride coagulant for water purification	en_US
dc.type	Journal Article
utslib.citation.volume	22	en_US
utslib.citation.volume	47	en_US
utslib.for	090410 Water Treatment Processes	en_US
utslib.for	0904 Chemical Engineering	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	in_progress
pubs.issue	22	en_US
pubs.publication-status	Published	en_US
pubs.volume	47	en_US

Abstract:

Polymeric metal coagulants are increasingly being used to improve coagulation efficiency, yet the research on the development of titanium and particularly polytitanium salts remains limited. This study is the first attempt in the synthesis, characterization, and application of polytitanium salts as coagulants. Polytitanium tetrachloride (PTC) solutions with different basicity values B (OH/Ti molar ratio) were prepared using a slow alkaline titration method. Jar tests were conducted to assess coagulation performance using both synthetic and real raw water samples, and the floc characteristics were monitored online using a laser diffraction particle size analyzer. Electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) was utilized to identify various Ti species, with the results providing strong evidence of the presence of various hydrolyzed Ti species in the titanium aqueous phase. Compared to titanium tetrachloride (TiCl4), higher or comparable turbidity and organic matter removal efficiency could be achieved by PTC with improved floc characteristics in terms of size, growth rate, and structure. Besides, the water pH after PTC coagulation was significantly improved toward neutral pH. This study indicates that PTC is an effective and promising coagulant for water purification. Besides, the PTC flocculated sludge was able to recycle and produce functional TiO2 photocatalyst. © 2013 American Chemical Society.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/26680