Reductive Immobilization of Chromium in Soils Containing Heterogeneous Fe-Bearing Minerals

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dc.authoridDogaroglu, Zeynep Gorkem/0000-0002-6566-5244
dc.authoridKantar, Cetin/0000-0001-9747-9115
dc.contributor.authorDogaroglu, Zeynep Gorkem
dc.contributor.authorKantar, Cetin
dc.date.accessioned2025-01-27T21:05:47Z
dc.date.available2025-01-27T21:05:47Z
dc.date.issued2016
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractCr(VI) immobilization in systems containing Fe-bearing soil minerals was studied in batch and column systems. Batch experiments showed that water chemistry such as solution pH and Cr(VI) concentration had a pronounced impact on Cr(VI) removal by Fe-bearing soil minerals. Acidic conditions were observed to be more favorable for enhanced Cr(VI) removal. The dependence of Cr(VI) removal on Cr(VI) concentration indicated that there were limited numbers of surface sites on Fe-bearing minerals responsible for Cr(VI) removal. A complexing agent, citrate, significantly enhanced both Cr(VI) removal and total Fe-dissolution from the mineral surfaces relative to non-citrate containing systems, and the iron drm, implying that Cr(VI) removal occurred mainly on mineral surfaces, andissolved from the mineral surfaces was in Fe(III) oxidation fo the surface Fe(II) sites played an active role in Cr(VI) reduction. The results from column experiments showed that the accumulation of surface precipitates resulted in clogging of pore spaces, thereby creating preferential flow paths within the column. However, the addition of citrate significantly prevented the accumulation of surface precipitates due to the formation of highly soluble Fe-citrate complexes. SEM images revealed that the precipitates accumulated in the column had sponge-like shapes. The energy-dispersive spectroscopy analysis provided further evidence that the surface precipitates formed also contained Cr species as well as Fe. Overall it is clear that Fe-bearing minerals may serve as an effective reducing agent for in-situ reductive immobilization of hexavalent chromium in subsurface systems.
dc.description.sponsorshipMersin University Scientific Research Fund (BAP) [BAP-FBE CMB (ZGG) 2010-2 YL]
dc.description.sponsorshipThe authors wish to thank Mersin University Scientific Research Fund (BAP) for financial support (Project No: BAP-FBE CMB (ZGG) 2010-2 YL).
dc.identifier.doi10.1080/15320383.2016.1217827
dc.identifier.endpage867
dc.identifier.issn1532-0383
dc.identifier.issn1549-7887
dc.identifier.issue8
dc.identifier.scopus2-s2.0-84987851144
dc.identifier.scopusqualityQ2
dc.identifier.startpage857
dc.identifier.urihttps://doi.org/10.1080/15320383.2016.1217827
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27791
dc.identifier.volume25
dc.identifier.wosWOS:000388508800002
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor & Francis Inc
dc.relation.ispartofSoil & Sediment Contamination
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectFe minerals
dc.subjectimmobilization
dc.subjectreduction
dc.subjectchromium
dc.subjecttransport
dc.titleReductive Immobilization of Chromium in Soils Containing Heterogeneous Fe-Bearing Minerals
dc.typeArticle

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