The removal of heavy metals from refinery effluents by sulfide precipitation

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dc.contributor.authorKartal, Levent
dc.contributor.authorŞen, Aysel
dc.contributor.authorTimur, Servet
dc.date.accessioned2023-11-28T07:19:57Z
dc.date.available2023-11-28T07:19:57Z
dc.date.issued2023en_US
dc.departmentHitit Üniversitesi, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü
dc.description.abstractThis study investigated the selective precipitation of copper (Cu2+), nickel (Ni2+) and zinc (Zn2+) ions from industrial wastewater by using sodium sulfide (Na2S). The effects of pH, time and free sulfide concentration on the selective precipitation were systematically investigated using synthetically prepared solutions and gold refinery wastewater. First, the optimum precipitation pH values of metals, the amount of Na2S and time were determined by using synthetic solutions containing Cu, Ni and Zn single metal ions. The highest precipitation efficiencies were obtained at a pH of 4, 5.3 and 5.3 for Cu, Ni and Zn, respectively. Based on these results, the effects of Na2S stoichiometry and time of precipitation were investigated with synthetically prepared solutions containing mixed metal ions (100?mg/L Cu2+, 90?mg/L Ni2+ and 100?mg/L Zn2+). Metal sulfide precipitation efficiencies increased with increasing amounts of Na2S and reached a maximum at a ratio of 1:1.75 (Metal ion: Na2S molar ratio). Lastly, the results obtained from the experiments performed with synthetic solutions were used for the metal sulfide precipitation from industrial wastewater. The precipitation from refining wastewater containing 10 g/L Cu2+, 0.3 g/L Ni2+ and 3 g/L Zn2+ ions was achieved at pH values from 2.3 to 5.3. At a pH of 2.3, Cu2+ precipitated as CuS (Cu2S) at 100% efficiency. While the Ni2+ concentration in the solution decreased by only 44% at a pH of 2.3, the Zn2+ concentration decreased by 52%. At a pH of 5.3, Cu2+ and Zn2+ precipitated together at 100%.
dc.description.provenanceSubmitted by Zeynep Umut NARİN (umutarslan@hitit.edu.tr) on 2023-11-28T07:18:57Z No. of bitstreams: 0en
dc.description.provenanceApproved for entry into archive by Zeynep Umut NARİN (umutarslan@hitit.edu.tr) on 2023-11-28T07:19:57Z (GMT) No. of bitstreams: 0en
dc.description.provenanceMade available in DSpace on 2023-11-28T07:19:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2023en
dc.identifier.citationKartal, L., Şen, A. ,Timur, T. (2023). The removal of heavy metals from refinery effluents by sulfide precipitation. Acta Montanistica Slovaca, 28(1).
dc.identifier.doi10.46544/AMS.v28i1.17
dc.identifier.endpage225en_US
dc.identifier.issn1335-1788
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ2
dc.identifier.startpage214en_US
dc.identifier.urihttps://doi.org/10.46544/AMS.v28i1.17
dc.identifier.urihttps://hdl.handle.net/11491/8713
dc.identifier.volume28en_US
dc.identifier.wosWOS:001058530200017
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorKartal, Levent
dc.language.isoen
dc.publisherBERG FAC TECHNICAL UNIV KOSICE
dc.relation.ispartofACTA MONTANISTICA SLOVACA
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectCopper sulfideen_US
dc.subjectNickel sulfideen_US
dc.subjectPrecipitationen_US
dc.subjectSulfide precipitationen_US
dc.subjectMetal sulfideen_US
dc.titleThe removal of heavy metals from refinery effluents by sulfide precipitation
dc.typeArticle

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