Publication:
Importance of cadmium speciation in nitrification inhibition

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dc.contributor.authorSEMERCİ, NESLİHAN
dc.contributor.authorsSemerci, Neslihan; Cecen, Ferhan
dc.date.accessioned2022-03-12T17:32:39Z
dc.date.available2022-03-12T17:32:39Z
dc.date.issued2007
dc.description.abstractIn this study, the influence of Cd speciation on nitrification inhibition was investigated in batch suspended growth activated sludge systems which contain biomass enriched in terms of nitrifiers. For this purpose, parallel measurements of specific oxygen uptake rates (SOUR), ammonium utilization rates (q(NH4)-N) and Cd uptake were carried out. Cd speciation was adjusted with a strong complexing agent, ethylenediaminetetraacetic acid (EDTA). Free and biosorbed Cd concentrations were theoretically determined by using the MINEQL+ program and the Cd adsorption constant, whereas labile Cd was determined by voltammetric measurements. The presence of EDTA decreased nitrification inhibition by lowering the available Cd species and by preventing biosorption of Cd. Almost complete recovery from inhibition was attained by EDTA addition to nitrifying bacteria which were inhibited by Cd for a certain time. These results suggested that the sites sensitive to Cd were rather located on the surface of bacterial cell than inside. Nitrification inhibition depended on equilibrium concentrations of free (Cd2+), labile (Cd-volt) and biosorbed Cd (Cd-volt) and did not correlate with the total Cd. The measurement of labile metal by voltammetry in inhibition studies is a promising approach since it is easy to apply in practice. (C) 2007 Elsevier B.V. All rights reserved.
dc.identifier.doi10.1016/j.jhazmat.2007.01.041
dc.identifier.eissn1873-3336
dc.identifier.issn0304-3894
dc.identifier.pubmed17307290
dc.identifier.urihttps://hdl.handle.net/11424/228649
dc.identifier.wosWOS:000249136200063
dc.language.isoeng
dc.publisherELSEVIER
dc.relation.ispartofJOURNAL OF HAZARDOUS MATERIALS
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectcadmium
dc.subjectinhibition
dc.subjectnitrification
dc.subjectspeciation
dc.subjectvoltammetry
dc.subjectactivated sludge
dc.subjectbiosorption
dc.subjectFREE-ION ACTIVITY
dc.subjectHEAVY-METALS
dc.subjectBIOAVAILABILITY
dc.subjectNICKEL(II)
dc.subjectCOMPLEXES
dc.titleImportance of cadmium speciation in nitrification inhibition
dc.typearticle
dspace.entity.typePublication
local.avesis.id4b953d35-88a9-4800-be86-359f143fd0a0
local.import.packageSS17
local.indexed.atWOS
local.indexed.atSCOPUS
local.indexed.atPUBMED
local.journal.numberofpages10
oaire.citation.endPage512
oaire.citation.issue1-2
oaire.citation.startPage503
oaire.citation.titleJOURNAL OF HAZARDOUS MATERIALS
oaire.citation.volume147
relation.isAuthorOfPublication2b40c564-3821-44aa-b6e7-770e18c2e489
relation.isAuthorOfPublication.latestForDiscovery2b40c564-3821-44aa-b6e7-770e18c2e489

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