Removal of chromium (vi) in aqueous environments using cork and heat-treated cork samples from quercus cerris and quercus suber
dc.contributor.author
dc.date.accessioned
2013-04-02T10:37:47Z
dc.date.available
2013-04-02T10:37:47Z
dc.date.issued
2012
dc.identifier.issn
1930-2126
dc.identifier.uri
dc.description.abstract
Chromium (VI) removal and its reduction to chromium (III) from aqueous solution by untreated and heat-treated Quercus cerris and heat-treated Quercus suber black agglomerate cork granules was investigated. Initial screening studies revealed that among the sorbents tested, untreated Q. cerris and Q. suber black agglomerate are the most efficient in the removal of Cr(VI) ions and were selected for adsorption essays. Heat treatment adversely affected chromium adsorption and chromium (VI) reduction in Q. cerris cork. The highest metal uptake was found at pH 3.0 for Q. cerris and pH 2.0 for black agglomerate. The experimental data fitted the Langmuir model and the calculated qmax was 22.98 mg/g in black agglomerate and 21.69 mg/g in untreated Q. cerris cork. The FTIR results indicated that while in black agglomerate, lignin is the sole component responsible for Cr(VI) sorption, and in untreated Q. cerris cork, suberin and polysaccharides also play a significant role on the sorption. The SEM-EDX results imply that chromium has a homogenous distribution within both cork granules. Also, phloemic residues in Q. cerris granules showed higher chromium concentration. The results obtained in this study show that untreated Q. cerris and black agglomerate cork granules can be an effective and economical alternative to more costly materials for the treatment of liquid wastes containing chromium
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
North Carolina State University
dc.relation.ispartof
© BioResources, 2012, vol. 7, núm. 4, p. 4843-4857
dc.relation.ispartofseries
Articles publicats (D-EQATA)
dc.rights
Tots els drets reservats
dc.title
Removal of chromium (vi) in aqueous environments using cork and heat-treated cork samples from quercus cerris and quercus suber
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.embargo.terms
Cap
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.idgrec
016405