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Sustainable approach for recycling seafood wastes for the removal of priority hazardous substances (Hg and Cd) from water

2016-07Journal article Restricted access
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dc.contributor.authorMonteiro, Rui J. R.
dc.contributor.authorLopes, Cláudia B.
dc.contributor.authorRocha, Luciana S.
dc.contributor.authorCoelho, João P.
dc.contributor.authorDuarte, Armando C.
dc.contributor.authorPereira, E.
dc.date.accessioned2017-04-07T15:56:58Z
dc.date.available2017-04-07T15:56:58Z
dc.date.issued2016-07
dc.description.abstractMercury and cadmium are considered by the water framework directive priority hazardous substances. In this work, the capacity of crab carapace and clam shell wastes to remove mercury and cadmium from water was evaluated under batch conditions, for realistic contamination scenarios in monometallic and binary solutions. The results evidenced that in monometallic solutions and under studied operational conditions, both biosorbents can achieve Hg2+ removal efficiencies higher than 80% and the kinetic process is well described by two of the most widely used equations, the pseudo-second order and the Elovich model. In terms of biosorption equilibrium, crab carapace and clam shell wastes displayed very distinct behaviours. While clam shells achieve the complete monolayer coverage and the isotherm is well described by the Langmuir model, crab carapace powder display a more unusual behaviour, that is well described by the BET isotherm, and is characterized by an almost convex shape to the concentration axis, with an infinite slope for an Hg2+ concentration in solution around 25 mu g/L. In binary solutions, both wastes are able to uptake simultaneously Hg2+ and Cd2+, however the uptake of Hg2+ was inhibited in some extent, attributed to the high kinetic and equilibrium selectivities of the bio-wastes for cadmium. (C) 2016 Elsevier Ltd. All rights reserved.
dc.identifier.doihttps://doi.org/10.1016/j.jece.2016.01.021
dc.identifier.issn2213-3437
dc.identifier.urihttp://hdl.handle.net/10400.1/9576
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationGraphene-based nanomaterials for multiple environmental applications
dc.relationCombined human exposure to fish and seafood contaminant mixtures: bio-accessibility, assimilation efficiency and toxicity
dc.relationBioavailability and responses of marine organisms to nanoparticles enriched in Ce and Ti
dc.relationIn situ trace metal speciation monitoring
dc.relation.isbasedonWOS:000391557600129
dc.subjectBiosorption
dc.subjectRemediation
dc.subjectHazardous substances removal
dc.subjectClam and crab wastes
dc.titleSustainable approach for recycling seafood wastes for the removal of priority hazardous substances (Hg and Cd) from water
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleGraphene-based nanomaterials for multiple environmental applications
oaire.awardTitleCombined human exposure to fish and seafood contaminant mixtures: bio-accessibility, assimilation efficiency and toxicity
oaire.awardTitleBioavailability and responses of marine organisms to nanoparticles enriched in Ce and Ti
oaire.awardTitleIn situ trace metal speciation monitoring
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAMB%2F50017%2F2013/PT
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oaire.citation.endPage1208
oaire.citation.issue1
oaire.citation.startPage1199
oaire.citation.titleJournal of Environmental Chemical Engineering
oaire.citation.volume4
oaire.fundingStream5876
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oaire.fundingStream5876
oaire.fundingStream5876-PPCDTI
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oaire.fundingStream3599-PPCDT
person.familyNameRocha
person.givenNameLuciana
person.identifier.ciencia-id9415-9C14-C4CD
person.identifier.orcid0000-0002-5469-0911
person.identifier.ridM-2566-2013
person.identifier.scopus-author-id8041532300
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project.funder.nameFundação para a Ciência e a Tecnologia
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