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dc.contributor.authorBurton, Edwarden_US
dc.contributor.authorHawker, Darrylen_US
dc.contributor.authorRedding, M.en_US
dc.date.accessioned2017-05-03T11:24:23Z
dc.date.available2017-05-03T11:24:23Z
dc.date.issued2003en_US
dc.date.modified2007-03-15T21:38:33Z
dc.identifier.issn00431354en_US
dc.identifier.urihttp://hdl.handle.net/10072/6077
dc.description.abstractThis paper describes the results of research examining the effect of dissolved organo-metallic complexes of copper (Cu) and zinc (Zn) from sewage sludge leachate on sorption by a humic-gley soil A-horizon, and the influence of such complexes on resultant sludge loading estimates. Sorption was described with Linear, Freundlich or Langmuir equations, and compared between a sample of sludge leachate (containing 97.4% of Cu and 63.2% of Zn as dissolved organo-metallic complexes) and a reference solution (which mimicked the leachate, except for a lack of dissolved organic material). This comparison revealed that dissolved organo-metallic complexes significantly depressed Cu and Zn sorption in the study soil. The isotherm equations were then used to estimate sludge-derived Cu and Zn loadings to soil in order to result in an "allowable" output concentration from the soil solution to the surrounding environment. These loadings, together with soil bulk density and "availability" of sludge Cu and Zn, were incorporated in a preliminary model to estimate sludge application rates which are acceptable in terms of off-site movement of these metals through leaching losses. In the absence of dissolved organo-metallic complexes (sorption from the reference solution), levels of Cu and Zn sorption in the study soil indicated a sludge application rate of approximately 3500 kg/ha. However, when Cu and Zn sorption from the sludge leachate with dissolved organo-metallic complexes was considered, calculated loading rates were reduced to approximately 690 kg-sludge/ha. This suggests that for sludge loading estimates based on soil sorption characteristics to be relevant to environmental protection, the sorption depressing effect of dissolved organo-metallic complexes should be quantitatively considered.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherPergamon-Elsevier Science Ltd.en_US
dc.publisher.placeUKen_US
dc.publisher.urihttp://www.elsevier.com/wps/find/journaldescription.cws_home/309/description#descriptionen_AU
dc.relation.ispartofpagefrom1394en_US
dc.relation.ispartofpageto1400en_US
dc.relation.ispartofjournalWater Researchen_US
dc.relation.ispartofvolume37en_US
dc.subject.fieldofresearchcode259902en_US
dc.titleEstimating sludge loadings to land based on trace metal sorption in soil: effect of dissolved organo-metallic complexesen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2003 Elsevier : Reproduced in accordance with the copyright policy of the publisher : This journal is available online - use hypertext links.en_AU
gro.date.issued2003
gro.hasfulltextNo Full Text


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