Fluoride removal from water using a magnesia-pullulan composite in a continuous fixed-bed column

Ye, Y; Yang, J; Jiang, W; Kang, J; Hu, Y; Ngo, HH; Guo, W; Liu, Y

Fluoride removal from water using a magnesia-pullulan composite in a continuous fixed-bed column

Ye, Y Yang, J Jiang, W Kang, J Hu, Y Ngo, HH

Guo, W

Liu, Y

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Publication Type:: Journal Article
Citation:: Journal of Environmental Management, 2018, 206 pp. 929 - 937
Issue Date:: 2018-01-15

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Field	Value	Language
dc.contributor.author	Ye, Y	en_US
dc.contributor.author	Yang, J	en_US
dc.contributor.author	Jiang, W	en_US
dc.contributor.author	Kang, J	en_US
dc.contributor.author	Hu, Y	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858	en_US
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961	en_US
dc.date.available	2020-05-25T19:03:23Z
dc.date.issued	2018-01-15	en_US
dc.identifier.citation	Journal of Environmental Management, 2018, 206 pp. 929 - 937	en_US
dc.identifier.issn	0301-4797	en_US
dc.identifier.uri	http://hdl.handle.net/10453/122143
dc.description.abstract	© 2017 Elsevier Ltd A magnesia-pullulan composite (MgOP) was previously shown to effectively remove fluoride from water. In the present study, a continuous fixed-bed column was used to examine the application of the composite at an industrial scale. The influencing parameters included bed mass (4.0, 6.0 and 8.0 g), influent flow rate (8, 16 and 32 mL/min), inlet fluoride concentration (5, 10 and 20 mg/L), reaction temperature (20, 30 and 40 °C), influent pH (4, 7 and 10) and other existing anions (HCO3−, SO42−, Cl− and NO3−), through which the breakthrough curves could be depicted for the experimental data analysis. The results indicated that MgOP is promising for fluoride removal with a defluoridation capacity of 16.6 mg/g at the bed mass of 6.0 g, influent flow rate of 16 mL/min and inlet fluoride concentration of 10 mg/L. The dynamics of the fluoride adsorption process were modeled using the Thomas and Yan models, in which the Yan model presented better predictions for the breakthrough curves than the Thomas model. Moreover, the concentration of magnesium in the effluent was monitored to determine Mg stability in the MgOP composite. Results indicated the effluent concentration of Mg2+ ions could be kept at a safe level. Calcination of fluoride-loaded MgOP effectively regenerated the material.	en_US
dc.relation.ispartof	Journal of Environmental Management	en_US
dc.relation.isbasedon	10.1016/j.jenvman.2017.11.081	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Fluorides	en_US
dc.subject.mesh	Water	en_US
dc.subject.mesh	Magnesium Oxide	en_US
dc.subject.mesh	Glucans	en_US
dc.subject.mesh	Water Pollutants, Chemical	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Adsorption	en_US
dc.title	Fluoride removal from water using a magnesia-pullulan composite in a continuous fixed-bed column	en_US
dc.type	Journal Article
utslib.citation.volume	206	en_US
utslib.for	0907 Environmental Engineering	en_US
utslib.for	0502 Environmental Science and Management	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	206	en_US

Abstract:

© 2017 Elsevier Ltd A magnesia-pullulan composite (MgOP) was previously shown to effectively remove fluoride from water. In the present study, a continuous fixed-bed column was used to examine the application of the composite at an industrial scale. The influencing parameters included bed mass (4.0, 6.0 and 8.0 g), influent flow rate (8, 16 and 32 mL/min), inlet fluoride concentration (5, 10 and 20 mg/L), reaction temperature (20, 30 and 40 °C), influent pH (4, 7 and 10) and other existing anions (HCO3−, SO42−, Cl− and NO3−), through which the breakthrough curves could be depicted for the experimental data analysis. The results indicated that MgOP is promising for fluoride removal with a defluoridation capacity of 16.6 mg/g at the bed mass of 6.0 g, influent flow rate of 16 mL/min and inlet fluoride concentration of 10 mg/L. The dynamics of the fluoride adsorption process were modeled using the Thomas and Yan models, in which the Yan model presented better predictions for the breakthrough curves than the Thomas model. Moreover, the concentration of magnesium in the effluent was monitored to determine Mg stability in the MgOP composite. Results indicated the effluent concentration of Mg2+ ions could be kept at a safe level. Calcination of fluoride-loaded MgOP effectively regenerated the material.

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http://hdl.handle.net/10453/122143