Publikation:
Pilot scale hexavalent chromium removal with reduction, coagulation, filtration and biological iron oxidation

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dc.contributor.authorDippon-Deissler, Urs
dc.contributor.authorMahringer, Daniel
dc.contributor.authorRuhl, Aki Sebastian
dc.contributor.authorZerelli, Sami Sofiene
dc.date.accessioned2024-06-16T14:05:27Z
dc.date.available2024-06-16T14:05:27Z
dc.date.issued2020
dc.description.abstractCr(VI) is identified as highly toxic, therefore a far-reaching limitation of total chromium or Cr(VI) in drinking water was proposed by the Germany Environment Agency. There is a lack in efficient treatment processes to reach Cr(VI) concentrations below 1 (my)g L-1. In this study, the combination of chemical reduction, coagulation and filtration (RCF) was further developed by adding biological iron removal as filtration step (RCbF). The aim of this enhancement was to reach lower effluent concentrations and a higher robustness regarding process parameters. The effectiveness of Cr(VI) removal was investigated using two-stage pilot-scale waterworks. RCbF reaches Cr(VI) effluent concentrations below 0.5 (my)g L-1 despite variations of pH, filtration velocity, or Cr(VI) influent concentrations. Fe(II) dosage and hence molar excess of Fe(II) over Cr(VI) was identified as the key parameter for Cr(VI) removal. Low oxygen dosage for biological iron removal improved the efficiency of RCbF compared to RCF. The co-precipitation of Cr(III) and Fe(III) as solid solution in the supernatant of the filter bed was promoted by low oxygen concentrations making Cr(VI) the preferred oxidant. RCbF was shown to be a suitable treatment process for reaching a low limit value for total chromium or Cr(VI) concerning technical feasibility. © 2020 The Authors.en
dc.format.extent1 Onlineressource (8 pages)
dc.format.mediumonline resource
dc.identifier.doihttps://doi.org/10.60810/openumwelt-1598
dc.identifier.urihttps://openumwelt.de/handle/123456789/4194
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectTrinkwasseraufbereitung
dc.titlePilot scale hexavalent chromium removal with reduction, coagulation, filtration and biological iron oxidation
dc.title.alternativePilot scale hexavalent chromium removal with reduction, coagulation, filtration and biological iron oxidation
dc.typeWissenschaftlicher Artikel
dc.type.dcmitext
dc.type.mediumcomputer
dspace.entity.typePublication
local.bibliographicCitation.journalTitleSeparation and purification technology
local.bibliographicCitation.originalDOI10.1016/j.seppur.2020.117478
local.bibliographicCitation.volume253 (2020)
local.collectionAufsätze
local.identifier.catalogId02476896
local.ingest.leader05413naa a2200000uu 4500
local.jointTitlePILOT SCALE HEXAVALENT CHROMIUM REMOVAL WITH REDUCTION COAGULATION FILTRATION AND BIOLOGICAL IRON OXIDATION
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