Investigation of phosphorus desorption from P-saturated alum sludge used as a substrate in constructed wetland

DC FieldValueLanguage
dc.contributor.authorZhao, X.H.-
dc.contributor.authorZhao, Y.Q.-
dc.date.accessioned2011-08-30T15:45:04Z-
dc.date.available2011-08-30T15:45:04Z-
dc.date.copyright2008 Elsevier B.V.en
dc.date.issued2009-04-07-
dc.identifier.citationSeparation and Purification Technologyen
dc.identifier.issn1383-5866-
dc.identifier.urihttp://hdl.handle.net/10197/3134-
dc.description.abstractPhosphorus (P) desorption from P-saturated alum sludge, which was used as main substrate in a novel constructed wetland for wastewater treatment, was studied. Groups of batch experiments were designed and conducted to explore the efficiencies of P extraction using different acids (HCl, HNO3, H2SO4) and bases (NaOH, KOH). The results showed that either acid or base is efficient for P-extraction and the efficiency relied mainly on the concentrations of H+/OH-, not the type of acid or base. Considering the efficiency, price and safety of the acids and bases tested, H2SO4 was chosen as most suitable reagent for P-extraction. A Box-Behnken experimental design based on the response surface methodology (RSM) was applied to evaluate the optimum of H2SO4 extraction. The optimal condition for the mass of sludge, H2SO4 concentration and volume was 0.8 g, 0.063 M and 142 ml, respectively. At such optimal condition, the maximum P-extraction efficiency of 98.2 % was achieved. Additionally, most of the main components of the saturated sludge, such as metals (Al, Ca, Mg, Fe), TOC (total organic carbon) and nitrogen can also be extracted. Overall, the results supported that H2SO4 seems to be an efficient and cost-effective reagent among all the reagents tested for P-saturated alum sludge treatment.en
dc.description.sponsorshipOther funderen
dc.format.extent240136 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherElsevieren
dc.relation.requiresArchitecture, Landscape & Civil Engineering Research Collectionen
dc.relation.requiresCritical Infrastructure Group Research Collectionen
dc.relation.requiresUrban Institute Ireland Research Collectionen
dc.rightsThis is the author’s version of a work that was accepted for publication in Separation and Purification Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Separation and Purification Technology Volume 66, Issue 1, 7 April 2009, Pages 71-75 DOI 10.1016/j.seppur.2008.11.020en
dc.subjectPhosphorusen
dc.subjectDesorptionen
dc.subjectAciden
dc.subjectBaseen
dc.subjectAlum sludgeen
dc.subjectRSMen
dc.subjectConstructed wetlanden
dc.subject.lcshPhosphorusen
dc.subject.lcshWater treatment plant residualsen
dc.subject.lcshResponse surfaces (Statistics)en
dc.subject.lcshConstructed wetlandsen
dc.subject.lcshChemical tests and reagentsen
dc.titleInvestigation of phosphorus desorption from P-saturated alum sludge used as a substrate in constructed wetlanden
dc.typeJournal Articleen
dc.internal.availabilityFull text availableen
dc.internal.webversionshttp://dx.doi.org/10.1016/j.seppur.2008.11.020-
dc.statusPeer revieweden
dc.identifier.volume66en
dc.identifier.issue1en
dc.identifier.startpage71en
dc.identifier.endpage75en
dc.identifier.doi10.1016/j.seppur.2008.11.020-
dc.neeo.contributorZhao|X.H.|aut|-
dc.neeo.contributorZhao|Y.Q.|aut|-
dc.description.othersponsorshipEnvironmental Protection Agencyen
item.grantfulltextopen-
item.fulltextWith Fulltext-
Appears in Collections:Centre for Water Resources Research Collection
Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection
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