Effects of chromium (VI) on the activities of ureolytic mixed culture

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dc.contributor.authorAltaş, Levent
dc.date.accessioned13.07.201910:50:10
dc.date.accessioned2019-07-29T19:29:10Z
dc.date.available13.07.201910:50:10
dc.date.available2019-07-29T19:29:10Z
dc.date.issued2009
dc.departmentMühendislik Fakültesi
dc.description.abstractBACKGROUND: Ureolytic microbial carbonate precipitation (MCP) is a novel process for removing excess calcium from industrial effluents. This process is based on the hydrolization of urea to provide a suitable medium for the precipitation of Ca as CaCO3. RESULT: A toxicity identification evaluation was conducted on synthetic wastewater simulating wastewater from paper recycling to determine the inhibition or toxicity of chromium(VI) ions on the activities of a ureolytic mixed culture (UMC) with respect to the removal rate of COD and removal of Ca2+ in batch reactors. The 50% inhibiting concentration (IC50) and the 25% inhibiting concentration (IC25) values of Cr(VI) on UMC were determined as 40 and 18 mg L-1, respectively, for an exposure time of 1 day. The inhibitory effects of Cr(VI) were lower on UMC after longer exposure times of 3,4 and 5 days. COD removal rate, ammonium production and Ca removal of samples with 512 mg Cr(VI) L-1 were significantly inhibited. CONCLUSION: The present study has shown that the effects of different metallic species, organic toxicants and other environmental factors should be taken into account when removing problematic Ca and other possible elements from the environment using UMC. (C) 2008 Society of Chemical Industry
dc.description.sponsorshipThe Turkish Scientific and Technical Research Council (TUBITAK); Turkish Government Planning Institution (DPT); CAYDAG [105Y262]; [DPT-2006K120880-1]
dc.description.sponsorshipThe Turkish Scientific and Technical Research Council (TUBITAK) and Turkish Government Planning Institution (DPT) funded this study. The author would like to thank them for the financial support given to the project with grant numbers CAYDAG 105Y262 and DPT-2006K120880-1.
dc.identifier.doi10.1002/jctb.2029
dc.identifier.endpage235en_US
dc.identifier.issn0268-2575
dc.identifier.issn1097-4660
dc.identifier.issue2en_US
dc.identifier.scopusqualityQ1
dc.identifier.startpage229en_US
dc.identifier.urihttps://doi.org/10.1002/jctb.2029
dc.identifier.urihttps://hdl.handle.net/20.500.12451/6137
dc.identifier.volume84en_US
dc.identifier.wosWOS:000262789100013
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofJournal of Chemical Technology and Biotechnology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectUreolytic Mixed Culture
dc.subjectInhibition
dc.subjectCr (VI)
dc.subjectCalcium Precipitation
dc.titleEffects of chromium (VI) on the activities of ureolytic mixed culture
dc.typeArticle

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