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Soil remediation time to achieve clean-up goals II: influence of natural organic matter and water contents

dc.contributor.authorAlvim-Ferraz, Maria da Conceição M.
dc.contributor.authorAlbergaria, José Tomás
dc.contributor.authorDelerue-Matos, Cristina
dc.date.accessioned2013-11-27T15:57:48Z
dc.date.available2013-11-27T15:57:48Z
dc.date.issued2006
dc.description.abstractThis work reports a relatively rapid procedure for the forecasting of the remediation time (RT) of sandy soils contaminated with cyclohexane using vapour extraction. The RT estimated through the mathematical fitting of experimental results was compared with that of real soils. The main objectives were: (i) to predict the RT of soils with natural organic matter (NOM) and water contents different from those used in experiments; and (ii) to analyse the time and efficiency of remediation, and the distribution of contaminants into the soil matrix after the remediation process, according to the soil contents of: (ii1) NOM; and (ii2) water. For sandy soils with negligible clay contents, artificially contaminated with cyclohexane before vapour extraction, it was concluded that: (i) if the NOM and water contents belonged to the range of the prepared soils, the RT of real soils could be predicted with relative differences not higher than 12%; (ii1) the increase of NOM content from 0% to 7.5% increased the RT (1.8–13 h) and decreased the remediation efficiency (RE) (99–90%) and (ii2) the increase of soil water content from 0% to 6% increased the RT (1.8–4.9 h) and decreased the RE (99–97%). NOM increases the monolayer capacity leading to a higher sorption into the solid phase. Increasing of soil water content reduces the mass transfer coefficient between phases. Concluding, NOM and water contents influence negatively the remediation process, turning it less efficient and more time consuming, and consequently more expensive.por
dc.identifier.doi10.1016/j.chemosphere.2005.10.065pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/3003
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relation.ispartofseriesChemosphere; Vol. 64, Issue 5
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0045653505012804por
dc.subjectSoil vapour extractionpor
dc.subjectSoil water contentpor
dc.subjectNatural organic matter contentpor
dc.subjectProcess efficiencypor
dc.subjectRemediation timepor
dc.subjectContaminant distributionpor
dc.titleSoil remediation time to achieve clean-up goals II: influence of natural organic matter and water contentspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage825por
oaire.citation.issueIssue 5
oaire.citation.startPage817por
oaire.citation.titleChemospherepor
oaire.citation.volumeVol. 64por
person.familyNameAlvim-Ferraz
person.familyNameDelerue-Matos
person.givenNameMaria da Conceição
person.givenNameCristina
person.identifier.ciencia-id621C-0AAB-ABF9
person.identifier.ciencia-id9A1A-43FB-5C27
person.identifier.orcid0000-0001-8212-8718
person.identifier.orcid0000-0002-3924-776X
person.identifier.ridP-9868-2017
person.identifier.ridD-4990-2013
person.identifier.scopus-author-id6603921357
person.identifier.scopus-author-id6603741848
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationa9196bc3-6bc6-4270-8407-39356ba909b0
relation.isAuthorOfPublication09f6a7bd-2f15-42b0-adc5-04bd22210519
relation.isAuthorOfPublication.latestForDiscovery09f6a7bd-2f15-42b0-adc5-04bd22210519

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