Application of kinetic models to the design of a calcite permeable reactive barrier (PRB) for fluoride remediation.

Cai, Q; Turner, BD; Sheng, D; Sloan, S

Application of kinetic models to the design of a calcite permeable reactive barrier (PRB) for fluoride remediation.

Cai, Q Turner, BD Sheng, D

Sloan, S

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Water Res, 2018, 130, pp. 300-311
Issue Date:: 2018-03-01

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Field	Value	Language
dc.contributor.author	Cai, Q
dc.contributor.author	Turner, BD
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.contributor.author	Sloan, S
dc.date.accessioned	2022-08-30T07:32:39Z
dc.date.available	2017-11-22
dc.date.available	2022-08-30T07:32:39Z
dc.date.issued	2018-03-01
dc.identifier.citation	Water Res, 2018, 130, pp. 300-311
dc.identifier.issn	0043-1354
dc.identifier.issn	1879-2448
dc.identifier.uri	http://hdl.handle.net/10453/161120
dc.description.abstract	The kinetics of fluoride sorption by calcite in the presence of metal ions (Co, Mn, Cd and Ba) have been investigated and modelled using the intra-particle diffusion (IPD), pseudo-second order (PSO), and the Hill 4 and Hill 5 kinetic models. Model comparison using the Akaike Information Criterion (AIC), the Schwarz Bayseian Information Criterion (BIC) and the Bayes Factor allows direct comparison of model results irrespective of the number of model parameters. Information Criterion results indicate "very strong" evidence that the Hill 5 model was the best fitting model for all observed data due to its ability to fit sigmoidal data, with confidence contour analysis showing the model parameters were well constrained by the data. Kinetic results were used to determine the thickness of a calcite permeable reactive barrier required to achieve up to 99.9% fluoride removal at a groundwater flow of 0.1 m.day-1. Fluoride removal half-life (t0.5) values were found to increase in the order Ba ≈ stonedust (a 99% pure natural calcite) < Cd < Co < Mn. A barrier width of 0.97 ± 0.02 m was found to be required for the fluoride/calcite (stonedust) only system when using no factor of safety, whilst in the presence of Mn and Co, the width increased to 2.76 ± 0.28 and 19.83 ± 0.37 m respectively. In comparison, the PSO model predicted a required barrier thickness of ∼46.0, 62.6 & 50.3 m respectively for the fluoride/calcite, Mn and Co systems under the same conditions.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Water Res
dc.relation.isbasedon	10.1016/j.watres.2017.11.046
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Engineering
dc.subject.mesh	Adsorption
dc.subject.mesh	Bayes Theorem
dc.subject.mesh	Calcium Carbonate
dc.subject.mesh	Diffusion
dc.subject.mesh	Fluorides
dc.subject.mesh	Groundwater
dc.subject.mesh	Kinetics
dc.subject.mesh	Metals, Heavy
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Water Purification
dc.subject.mesh	Calcium Carbonate
dc.subject.mesh	Fluorides
dc.subject.mesh	Metals, Heavy
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Bayes Theorem
dc.subject.mesh	Water Purification
dc.subject.mesh	Diffusion
dc.subject.mesh	Kinetics
dc.subject.mesh	Adsorption
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Groundwater
dc.title	Application of kinetic models to the design of a calcite permeable reactive barrier (PRB) for fluoride remediation.
dc.type	Journal Article
utslib.citation.volume	130
utslib.location.activity	England
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
utslib.copyright.status	closed_access	*
dc.date.updated	2022-08-30T07:32:38Z
pubs.publication-status	Published
pubs.volume	130

Abstract:

The kinetics of fluoride sorption by calcite in the presence of metal ions (Co, Mn, Cd and Ba) have been investigated and modelled using the intra-particle diffusion (IPD), pseudo-second order (PSO), and the Hill 4 and Hill 5 kinetic models. Model comparison using the Akaike Information Criterion (AIC), the Schwarz Bayseian Information Criterion (BIC) and the Bayes Factor allows direct comparison of model results irrespective of the number of model parameters. Information Criterion results indicate "very strong" evidence that the Hill 5 model was the best fitting model for all observed data due to its ability to fit sigmoidal data, with confidence contour analysis showing the model parameters were well constrained by the data. Kinetic results were used to determine the thickness of a calcite permeable reactive barrier required to achieve up to 99.9% fluoride removal at a groundwater flow of 0.1 m.day-1. Fluoride removal half-life (t0.5) values were found to increase in the order Ba ≈ stonedust (a 99% pure natural calcite) < Cd < Co < Mn. A barrier width of 0.97 ± 0.02 m was found to be required for the fluoride/calcite (stonedust) only system when using no factor of safety, whilst in the presence of Mn and Co, the width increased to 2.76 ± 0.28 and 19.83 ± 0.37 m respectively. In comparison, the PSO model predicted a required barrier thickness of ∼46.0, 62.6 & 50.3 m respectively for the fluoride/calcite, Mn and Co systems under the same conditions.

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http://hdl.handle.net/10453/161120