Experimental investigation and modeling of dissolved organic carbon removal by coagulation from seawater

Jeong, S; Sathasivan, A; Kastl, G; Shim, WG; Vigneswaran, S

Experimental investigation and modeling of dissolved organic carbon removal by coagulation from seawater

Jeong, S

Sathasivan, A Kastl, G Shim, WG Vigneswaran, S

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Publication Type:: Journal Article
Citation:: Chemosphere, 2014, 95 pp. 310 - 316
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Jeong, S https://orcid.org/0000-0001-8995-3497	en_US
dc.contributor.author	Sathasivan, A	en_US
dc.contributor.author	Kastl, G	en_US
dc.contributor.author	Shim, WG	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.date.available	2013-09-02	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	Chemosphere, 2014, 95 pp. 310 - 316	en_US
dc.identifier.issn	0045-6535	en_US
dc.identifier.uri	http://hdl.handle.net/10453/33047
dc.description.abstract	Coagulation removes colloidal matters and dissolved organic carbon (DOC) which can cause irreversible membrane fouling. However, how DOC is removed by coagulant is not well-known. Jar test was used to study the removal of hydrophobic and hydrophilic DOC fractions at various doses (0.5-8.0mg-Fe+3L-1) of ferric chloride (FeCl3) and pH (5.0-9.0). Natural organic matter (NOM) in seawater and treated seawater were fractionated by liquid chromatography-organic carbon detector (LC-OCD). Compared to surface water, the removal of DOC in seawater by coagulation was remarkably different. Majority of DOC could be easily removed with very low coagulant dose (<5.0mg-Fe+3L-1) and the removal efficiency did not vary with pH, but the DOC composition in treated water had significantly changed. Hydrophobic fraction (HB) was better removed at high pH while hydrophilic fraction (HF) was better removed at low pH. A modified model of Kastl et al. (2004) which assumed that the removal occurred by adsorption of un-dissociated compounds onto ferric hydroxide was formulated and successfully validated against the jar test data. © 2013 Elsevier Ltd.	en_US
dc.relation.ispartof	Chemosphere	en_US
dc.relation.isbasedon	10.1016/j.chemosphere.2013.09.022	en_US
dc.subject.classification	Meteorology & Atmospheric Sciences	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Chlorides	en_US
dc.subject.mesh	Carbon	en_US
dc.subject.mesh	Ferric Compounds	en_US
dc.subject.mesh	Seawater	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Adsorption	en_US
dc.subject.mesh	Models, Chemical	en_US
dc.title	Experimental investigation and modeling of dissolved organic carbon removal by coagulation from seawater	en_US
dc.type	Journal Article
utslib.citation.volume	95	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	closed_access
pubs.publication-status	Published	en_US
pubs.volume	95	en_US

Abstract:

Coagulation removes colloidal matters and dissolved organic carbon (DOC) which can cause irreversible membrane fouling. However, how DOC is removed by coagulant is not well-known. Jar test was used to study the removal of hydrophobic and hydrophilic DOC fractions at various doses (0.5-8.0mg-Fe+3L-1) of ferric chloride (FeCl3) and pH (5.0-9.0). Natural organic matter (NOM) in seawater and treated seawater were fractionated by liquid chromatography-organic carbon detector (LC-OCD). Compared to surface water, the removal of DOC in seawater by coagulation was remarkably different. Majority of DOC could be easily removed with very low coagulant dose (<5.0mg-Fe+3L-1) and the removal efficiency did not vary with pH, but the DOC composition in treated water had significantly changed. Hydrophobic fraction (HB) was better removed at high pH while hydrophilic fraction (HF) was better removed at low pH. A modified model of Kastl et al. (2004) which assumed that the removal occurred by adsorption of un-dissociated compounds onto ferric hydroxide was formulated and successfully validated against the jar test data. © 2013 Elsevier Ltd.

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http://hdl.handle.net/10453/33047