Publikation:
Redox Behavior of Chromium in the Reduction, Coagulation, and Biotic Filtration (RCbF) Drinking Water Treatment

Kurzanzeige
dc.contributor.authorMahringer, Daniel
dc.contributor.authorRuhl, Aki Sebastian
dc.contributor.authorZerelli, Sami Sofiene
dc.date.accessioned2024-06-16T12:42:30Z
dc.date.available2024-06-16T12:42:30Z
dc.date.issued2023
dc.description.abstractThe chromium (Cr) limit values are currently tightened to 25 (micro)g L-1 (EU), 5 (micro)g L-1 (Germany), and possibly 10 (micro)g L-1 Cr(VI) (California). The combined process of chemical reduction, coagulation, and biotic filtration (RCbF) efficiently removes Cr(VI) in drinking water. In this study, redox-active substances (O2, NO3-, Fe2+, MnO2) were investigated concerning their effect on the RCbF process. The experiments were performed at two-stage pilot waterworks for biological iron and manganese removal. O2 or NO3- as oxidants affected the RCbF process, neither by consumption of the reductant Fe(II) nor by re-oxidation of already formed Cr(III) in the supernatant of the filter bed. However, the oxidation of Cr(III) by O2 to Cr(VI) with MnO2 as a mediator was identified as potential risk for Cr breakthrough. Up to one third of the initial Cr(III) concentration was oxidized to Cr(VI) in the second filter bed within a contact time of only 5 min. The kinetically relevant mechanism seemed to be the formation of Cr(III)Fe(III)-hydroxides and not the reduction of Cr(VI) by Fe(II). Further, the mixing of Cr(VI) containing raw water with Fe(II) containing groundwater was determined as a chemical-free alternative for the RCbF process, depending on the resulting Fe(II) concentration after mixing. © 2023 by the authorsen
dc.format.extent1 Onlineresource (12 pages)
dc.format.mediumonline resource
dc.identifier.doihttps://doi.org/10.60810/openumwelt-1375
dc.identifier.urihttps://openumwelt.de/handle/123456789/1667
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectChrom III
dc.subjectTrinkwasseraufbereitung
dc.titleRedox Behavior of Chromium in the Reduction, Coagulation, and Biotic Filtration (RCbF) Drinking Water Treatment
dc.typeWissenschaftlicher Artikel
dc.type.dcmitext
dc.type.mediumcomputer
dspace.entity.typePublication
local.bibliographicCitation.journalTitleWater
local.bibliographicCitation.originalDOI10.3390/w15193363
local.bibliographicCitation.volume15 (2023), Heft 19
local.collectionAufsätze
local.identifier.catalogId02500528
local.ingest.leader05152naa a2200000uu 4500
local.jointTitleREDOX BEHAVIOR OF CHROMIUM IN THE REDUCTION COAGULATION AND BIOTIC FILTRATION RCBF DRINKING WATER TREATMENT A PILOT STUDY
local.reviewtrue
local.sourcecatalog
local.source.urihttp://creativecommons.org/licenses/by/4.0/deed.de
local.staffPublicationtrue
local.subtitlea pilot study
relation.isAuthorOfPublicationfba58f27-54f7-4850-bd01-9fe404bb8237
relation.isAuthorOfPublication94c1139a-1828-4d1c-bf3e-f6f519e3d4e8
relation.isAuthorOfPublicationeabf440d-eff8-4e17-9bff-c30bf3585011
relation.isAuthorOfPublication.latestForDiscoveryfba58f27-54f7-4850-bd01-9fe404bb8237
Dateien
Sammlungen
Aufsätze