Performance of flocculation titanium salts for seawater reverse osmosis pretreatment

Shrestha, A; Naidu, G; Johir, MAH; Kandasamy, J; Vigneswaran, S

Performance of flocculation titanium salts for seawater reverse osmosis pretreatment

Shrestha, A Naidu, G

Johir, MAH

Kandasamy, J Vigneswaran, S

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Publication Type:: Journal Article
Citation:: Desalination and Water Treatment, 2017, 98 pp. 92 - 97
Issue Date:: 2017-12-01

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Field	Value	Language
dc.contributor.author	Shrestha, A	en_US
dc.contributor.author	Naidu, G https://orcid.org/0000-0002-6406-3444	en_US
dc.contributor.author	Johir, MAH https://orcid.org/0000-0001-6222-6943	en_US
dc.contributor.author	Kandasamy, J	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.date.issued	2017-12-01	en_US
dc.identifier.citation	Desalination and Water Treatment, 2017, 98 pp. 92 - 97	en_US
dc.identifier.issn	1944-3994	en_US
dc.identifier.uri	http://hdl.handle.net/10453/126024
dc.description.abstract	© 2017 Desalination Publications. All rights reserved. This study evaluated the performance of titanium tetrachloride (TiCl4) and titanium sulphate (Ti(SO4)2) as coagulants to remove organic matter and solids from actual seawater. The coagulant performances were evaluated at different doses in terms of turbidity, dissolved organic carbon (DOC), humics (UV254), zeta potential and pH of the solution. The performance of Ti-salts were compared to ferric chloride (FeCl3), a commonly used coagulant. The results showed that at pH of 8.0 (closely similar to seawater pH), TiCl4 showed relatively better performance over FeCl3 and Ti(SO4)2 for the same coagulant dose of 20 mg/L. TiCl4 achieved a 70% DOC and UV254 removal. This was approximately two times higher than achieved by FeCl3 and Ti(SO4)2. Based on a floc zeta potential evaluation, the difference in performance of the coagulants were attributed to the coagulation mechanism. The coagulation mechanisms of Ti-salts were mainly charge neutralization while FeCl3was adsorption mechanism.	en_US
dc.relation.ispartof	Desalination and Water Treatment	en_US
dc.relation.isbasedon	10.5004/dwt.2017.21703	en_US
dc.title	Performance of flocculation titanium salts for seawater reverse osmosis pretreatment	en_US
dc.type	Journal Article
utslib.citation.volume	98	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0907 Environmental 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
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	98	en_US

Abstract:

© 2017 Desalination Publications. All rights reserved. This study evaluated the performance of titanium tetrachloride (TiCl4) and titanium sulphate (Ti(SO4)2) as coagulants to remove organic matter and solids from actual seawater. The coagulant performances were evaluated at different doses in terms of turbidity, dissolved organic carbon (DOC), humics (UV254), zeta potential and pH of the solution. The performance of Ti-salts were compared to ferric chloride (FeCl3), a commonly used coagulant. The results showed that at pH of 8.0 (closely similar to seawater pH), TiCl4 showed relatively better performance over FeCl3 and Ti(SO4)2 for the same coagulant dose of 20 mg/L. TiCl4 achieved a 70% DOC and UV254 removal. This was approximately two times higher than achieved by FeCl3 and Ti(SO4)2. Based on a floc zeta potential evaluation, the difference in performance of the coagulants were attributed to the coagulation mechanism. The coagulation mechanisms of Ti-salts were mainly charge neutralization while FeCl3was adsorption mechanism.

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http://hdl.handle.net/10453/126024