Role of low molecular weight organic acids on pyrite dissolution in aqueous systems: implications for catalytic chromium (VI) treatment

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dc.authoridKantar, Cetin/0000-0001-9747-9115
dc.contributor.authorKantar, Cetin
dc.date.accessioned2025-01-27T20:35:11Z
dc.date.available2025-01-27T20:35:11Z
dc.date.issued2016
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractA systematic study combining batch experiments with spectroscopic analyses was carried out to better understand the effects of various organic acids on pyrite dissolution and subsequent Cr(VI) removal in aqueous systems. Our results suggest that organic acids had no effect on total Fe dissolution from pyrite relative to systems containing no acid. However, while nearly 100% of total Fe dissolved from pyrite was in Fe(II) form in the absence of ligands, the addition of organic acids led to significant oxidation of Fe(II) species to Fe(III). The degree and extent of Fe(II) oxidation increased in the order: tartrate < salicylate < oxalate approximate to citrate < EDTA. Except for salicylate (an aromatic compound), this stimulatory effect observed in Fe(II) oxidation was well correlated with the strength of Fe-ligand complexes. In systems containing Cr(VI), the amount of Fe dissolved increased significantly relative to non-Cr(VI) containing system, and the ligands enhanced the dissolution of surface oxidation products from pyrite. Overall, it is clear that the dissolution of pyrite with organic acids had very little effect on solution phase Cr(VI) removal, but significantly stimulated surface phase Cr(VI) reduction by removing surface oxidation products, and thus creating new surface sites for extended Cr(VI) removal.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [110Y293]
dc.description.sponsorshipThis work was fully funded by the Scientific and Technological Research Council of Turkey (TUBITAK) (Project No. 110Y293).
dc.identifier.doi10.2166/wst.2016.182
dc.identifier.endpage109
dc.identifier.issn0273-1223
dc.identifier.issn1996-9732
dc.identifier.issue1
dc.identifier.pmid27386987
dc.identifier.scopus2-s2.0-84980022917
dc.identifier.scopusqualityQ2
dc.identifier.startpage99
dc.identifier.urihttps://doi.org/10.2166/wst.2016.182
dc.identifier.urihttps://hdl.handle.net/20.500.12428/23591
dc.identifier.volume74
dc.identifier.wosWOS:000379662100010
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherIwa Publishing
dc.relation.ispartofWater Science and Technology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectchromium
dc.subjectdissolution
dc.subjectligand
dc.subjectpyrite
dc.subjecttreatment
dc.titleRole of low molecular weight organic acids on pyrite dissolution in aqueous systems: implications for catalytic chromium (VI) treatment
dc.typeArticle

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