Effect of exopolymeric substances on the kinetics of sorption and desorption of trivalent chromium in soil

Basit Öğe Kaydı
dc.authoridDEMIR, Aydeniz/0000-0002-3803-3647
dc.authoridKantar, Cetin/0000-0001-9747-9115
dc.contributor.authorKantar, Cetin
dc.contributor.authorDemir, Aydeniz
dc.contributor.authorKoleli, Nurcan
dc.date.accessioned2025-01-27T20:29:31Z
dc.date.available2025-01-27T20:29:31Z
dc.date.issued2014
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractLaboratory batch sorption-desorption and column experiments were performed to better understand the effects of microbial exopolymeric substances (EPS) on Cr(III) sorption/desorption rates in the soil-water system. The experiments were carried out in two different modes: one mode (sorption) in which Cr(III) and EPS were applied simultaneously, and the other (desorption) included the sequential application of Cr(III) and EPS to the soil-water system. The batch sorption and desorption experiments showed that, while chromium(III) desorption was significantly enhanced in the presence of EPS relative to non-EPS-containing systems, the desorption rates were much smaller than the sorption rates, and the fraction dissolved by EPS accounted for only a small portion of the total chromium initially sorbed onto soil minerals. Similarly, the column experiments suggested that, while the microbial EPS led to an increase in Cr dissolution relative to non-EPS-containing systems, only a small portion of the total chromium initially added to the soil was mobilised. The differences observed in Cr sorption and desorption rates can be explained through the very low solubility and strong interactions of chromium species with soil minerals as well as the mass transfer effects associated with low diffusion rates. The overall results suggest that, while microbial EPS may play an important role in microbial Cr(VI) treatment in sub-surface systems due to the formation of soluble Cr-EPS complexes, the extent and degree of Cr mobilisation are highly dependent on the type of initial Cr sorption. (C) 2013 Institute of Chemistry, Slovak Academy of Sciences
dc.description.sponsorshipScientific and Technical Research Council of Turkey (TUBITAK) [105Y272]
dc.description.sponsorshipFinancial support for the present study was provided by the Scientific and Technical Research Council of Turkey (TUBITAK) (Project no. 105Y272). We are also grateful to Nazime Mercan Dogan for providing us with EPS samples.
dc.identifier.doi10.2478/s11696-013-0427-4
dc.identifier.endpage120
dc.identifier.issn2585-7290
dc.identifier.issn1336-9075
dc.identifier.issue1
dc.identifier.scopus2-s2.0-84885020789
dc.identifier.scopusqualityQ2
dc.identifier.startpage112
dc.identifier.urihttps://doi.org/10.2478/s11696-013-0427-4
dc.identifier.urihttps://hdl.handle.net/20.500.12428/22970
dc.identifier.volume68
dc.identifier.wosWOS:000324491200014
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer International Publishing Ag
dc.relation.ispartofChemical Papers
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectchromium
dc.subjectadsorption
dc.subjectrate
dc.subjecttransport
dc.subjectcomplexation
dc.subjectdesorption
dc.titleEffect of exopolymeric substances on the kinetics of sorption and desorption of trivalent chromium in soil
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu