Comparison of a novel polytitanium chloride coagulant with polyaluminium chloride: Coagulation performance and floc characteristics

Zhao, YX; Phuntsho, S; Gao, BY; Yang, YZ; Kim, JH; Shon, HK

Comparison of a novel polytitanium chloride coagulant with polyaluminium chloride: Coagulation performance and floc characteristics

Zhao, YX Phuntsho, S

Gao, BY Yang, YZ Kim, JH Shon, HK

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Publication Type:: Journal Article
Citation:: Journal of Environmental Management, 2015, 147 pp. 194 - 202
Issue Date:: 2015-01-01

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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	Yang, YZ	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.available	2014-09-14	en_US
dc.date.issued	2015-01-01	en_US
dc.identifier.citation	Journal of Environmental Management, 2015, 147 pp. 194 - 202	en_US
dc.identifier.issn	0301-4797	en_US
dc.identifier.uri	http://hdl.handle.net/10453/119051
dc.description.abstract	© 2014 Elsevier Ltd. Polymerized inorganic coagulants are increasingly being used in the water supply and wastewater treatment process, yet there is limited research on the development of polytitanium coagulants. The aim of this study is to synthesize polytitanium chloride (PTC) coagulants and investigate their coagulation behavior and floc characteristics for humic acid removal in comparison to polyaluminum chloride (PAC). The PTC samples with different B (molar ratios of OH/Ti) values were prepared using an instantaneous base-feeding method, employing sodium carbonate as the basification agent. The coagulation efficiency was significantly influenced by different B values. The results suggest that the humic acid removal increased with the increasing B value for PAC, while the inverse trend was observed for PTC. The optimum B value was chosen at 1.0 and 2.0 for PTC and PAC, respectively. Under the optimum coagulant dose and initial solution pH conditions, the PTC coagulant performed better than the PAC coagulant and the floc properties were significantly improved in terms of floc growth rate and floc size. However, the PAC coagulants produced flocs with better floc recoverability than the PTC coagulants.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP130103129
dc.relation.ispartof	Journal of Environmental Management	en_US
dc.relation.isbasedon	10.1016/j.jenvman.2014.09.023	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Alkalies	en_US
dc.subject.mesh	Aluminum Hydroxide	en_US
dc.subject.mesh	Chlorides	en_US
dc.subject.mesh	Titanium	en_US
dc.subject.mesh	Humic Substances	en_US
dc.subject.mesh	Polymers	en_US
dc.subject.mesh	Solutions	en_US
dc.subject.mesh	Water Pollutants, Chemical	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Flocculation	en_US
dc.subject.mesh	Chemical Precipitation	en_US
dc.title	Comparison of a novel polytitanium chloride coagulant with polyaluminium chloride: Coagulation performance and floc characteristics	en_US
dc.type	Journal Article
utslib.citation.volume	147	en_US
utslib.for	090404 Membrane and Separation Technologies	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	closed_access
pubs.publication-status	Published	en_US
pubs.volume	147	en_US

Abstract:

© 2014 Elsevier Ltd. Polymerized inorganic coagulants are increasingly being used in the water supply and wastewater treatment process, yet there is limited research on the development of polytitanium coagulants. The aim of this study is to synthesize polytitanium chloride (PTC) coagulants and investigate their coagulation behavior and floc characteristics for humic acid removal in comparison to polyaluminum chloride (PAC). The PTC samples with different B (molar ratios of OH/Ti) values were prepared using an instantaneous base-feeding method, employing sodium carbonate as the basification agent. The coagulation efficiency was significantly influenced by different B values. The results suggest that the humic acid removal increased with the increasing B value for PAC, while the inverse trend was observed for PTC. The optimum B value was chosen at 1.0 and 2.0 for PTC and PAC, respectively. Under the optimum coagulant dose and initial solution pH conditions, the PTC coagulant performed better than the PAC coagulant and the floc properties were significantly improved in terms of floc growth rate and floc size. However, the PAC coagulants produced flocs with better floc recoverability than the PTC coagulants.

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http://hdl.handle.net/10453/119051