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dc.typeArtigo de periódicopt_BR
dc.titleBiosorption Of Heavy Metals Using Rice Milling By-products. Characterisation And Application For Removal Of Metals From Aqueous Effluents.pt_BR
dc.contributor.authorTarley, César Ricardo Teixeirapt_BR
dc.contributor.authorArruda, Marco Aurélio Zezzipt_BR
unicamp.authorCésar Ricardo Teixeira Tarley, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas--UNICAMP, P.O. Box 6154, Campinas 13084-971, São Paulo, Brazil.pt_BR Aurélio Zezzi Arruda,pt
dc.subjectHydrogen-ion Concentrationpt_BR
dc.subjectMetals, Heavypt_BR
dc.subjectMicroscopy, Electron, Scanningpt_BR
dc.subjectOryza Sativapt_BR
dc.subjectParticle Sizept_BR
dc.subjectSpectrometry, X-ray Emissionpt_BR
dc.subjectSpectrum Analysispt_BR
dc.subjectWater Purificationpt_BR
dc.subjectX-ray Diffractionpt_BR
dc.description.abstractThe morphological characteristics as well as chemical composition of rice husks were evaluated by different techniques such as spectroscopy and thermogravimetry. The material, which is considered a by-product obtained from rice milling, was then investigated as a potential decontaminant of toxic heavy metals present in laboratory effluents. Studies using glass columns were carried out at room temperature employing 100 ml of synthetic solutions containing Cd(II) and Pb(II) at 100 mg l(-1) in order to study the effects of pH, flow rate and particle size on Cd(II) and Pb(II) adsorption. After establishing the optimised conditions, the potentiality of rice husks for removing Cd(II) and Pb(II) ions from 100 ml of laboratory effluent, presenting concentrations before treatment of 22 and 12 mg l(-1), respectively, was evaluated. The ability to take up other metals species, such as Al(III), Cu(II) and Zn(II), present in this effluent was also studied. According to the data obtained, under the optimised conditions (pH=4.0, flow rate of 8.0 ml min(-1) and < or =355 microm rice husk particle size), 30 g of husks were necessary to attain the permissible limits for effluent release, as recommend by the EPA, for those species evolved in this work (Al, Cd, Cu, Pb and Zn).en
dc.identifier.citationChemosphere. v. 54, n. 7, p. 987-95, 2004-Feb.pt_BR
dc.description.provenanceMade available in DSpace on 2015-11-27T12:58:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2004en
Appears in Collections:Unicamp - Artigos e Outros Documentos

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