Reuse of aluminium-based water treatment sludge to immobilize a wide range of phosphorus contamination : equilibrium study with different isotherm models

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dc.contributor.author Zhao, Y.Q.
dc.contributor.author Razali, Melanie
dc.contributor.author Babatunde, A.O.
dc.contributor.author Yang, Y.
dc.contributor.author Bruen, Michael
dc.date.accessioned 2011-09-23T14:52:31Z
dc.date.available 2011-09-23T14:52:31Z
dc.date.copyright Taylor & Francis Group, LLC en
dc.date.issued 2007-10
dc.identifier.citation Separation Science and Technology en
dc.identifier.issn 0149-6395 (Print)
dc.identifier.issn 1520-5754 (Online)
dc.identifier.uri http://hdl.handle.net/10197/3176
dc.description.abstract The adsorption equilibrium of a wide range of phosphorus species by an aluminium-based water treatment sludge (Al-WTS) was examined in this study. Four kinds of adsorption-isotherm models, namely Langmuir, Freundlich, Temkin and Dubinin-Radushkevich, were used to fit the adsorption equilibrium data. In order to optimise the adsorption-isotherm model, correlation coefficient (R2) and four error functions were employed to facilitate the evaluation of fitting accuracy. Experiments have demonstrated that the Al-WTS may be an excellent raw material to adsorb P in polluted aqueous environment with adsorption ability in the order of KH2PO4 (ortho-P) > Na(PO3)6 (poly-P) > C10H14N5O7P·H2O (organic-P). More importantly, this study provides an entire comparison of the four isotherms in describing the P adsorption behaviour. By considering both the standard least-square based R2 and the results of four error functions analysis, this study reveals that the Freundlich isotherm appears to be the best model to fit the experimental equilibrium data. Langmuir and Temkin isotherms are also good models in current experimental conditions while Dubinin-Radushkevich isotherm poorly described the adsorption behaviour. The error analysis in this study provides vital evidence to reflect its role in facilitating the optimisation in adsorption isotherm study. Obviously, R2 seems inadequate in optimising multi-isotherm models due to its inherent bias resulting from the least-squares linearisation. en
dc.description.sponsorship Other funder en
dc.format.extent 333347 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Taylor & Francis en
dc.relation.requires Architecture, Landscape & Civil Engineering Research Collection en
dc.relation.requires Critical Infrastructure Group Research Collection en
dc.relation.requires Urban Institute Ireland Research Collection en
dc.rights This is an electronic version of an article published in Separation Science and Technology, 42 (12): 2705-2721 available online at: http://www.tandfonline.com/doi/abs/10.1080/01496390701511531 en
dc.subject Adsorption en
dc.subject Aluminium en
dc.subject Disposal en
dc.subject Drinking water treatment sludge en
dc.subject Phosphorus removal en
dc.subject Reuse en
dc.subject Wastewater treatment en
dc.subject.lcsh Phosphorus--Absorption and adsorption en
dc.subject.lcsh Water treatment plant residuals en
dc.subject.lcsh Water--Phosphorus content en
dc.subject.lcsh Water--Purification en
dc.title Reuse of aluminium-based water treatment sludge to immobilize a wide range of phosphorus contamination : equilibrium study with different isotherm models en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions Publisher's version en
dc.internal.webversions http://dx.doi.org/10.1080/01496390701511531 en
dc.status Peer reviewed en
dc.identifier.volume 42 en
dc.identifier.issue 12 en
dc.identifier.startpage 2705 en
dc.identifier.endpage 2721 en
dc.identifier.doi 10.1080/01496390701511531
dc.neeo.contributor Zhao|Y.Q.|aut| en
dc.neeo.contributor Razali|Melanie|aut| en
dc.neeo.contributor Babatunde|A.O.|aut| en
dc.neeo.contributor Yang|Y.|aut| en
dc.neeo.contributor Bruen|Michael|aut| en
dc.description.othersponsorship Environmental Protection Agency en


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