Publikation:
Prospective environmental risk assessment of mixtures in wastewater

Kurzanzeige
dc.contributor.authorCoors, Anja
dc.contributor.authorVollmar, Pia
dc.contributor.authorSacher, Frank
dc.contributor.authorHassold, Enken
dc.contributor.authorPolleichtner, Christian
dc.contributor.authorGildemeister, Daniela
dc.contributor.authorKühnen, Ute
dc.date.accessioned2024-06-16T14:57:52Z
dc.date.available2024-06-16T14:57:52Z
dc.date.issued2018
dc.description.abstractThe aquatic environment is continually exposed to a complex mixture of chemicals, whereby effluents of wastewater treatment plants (WWTPs) are one key source. The aim of the present study was to investigate whether environmental risk assessments (ERAs) addressing individual substances are sufficiently protective for such coincidental mixtures. Based on a literature review of chemicals reported to occur in municipal WWTP effluents and mode-of-action considerations, four different types of mixtures were composed containing human pharmaceuticals, pesticides, and chemicals regulated under REACH. The experimentally determined chronic aquatic toxicity of these mixtures towards primary producers and the invertebrate Daphnia magna could be adequately predicted by the concept of concentration addition, with up to 5-fold overestimation and less than 3-fold underestimation of mixture toxicity. Effluents of a municipal WWTP had no impact on the predictability of mixture toxicity and showed no adverse effects on the test organisms. Predictive ERAs for the individual mixture components based on here derived predicted no effect concentrations (PNECs) and median measured concentrations in WWTP effluents (MCeff) indicated no unacceptable risk for any of the individual chemicals, while MCeff/PNEC summation indicated a possible risk for multi-component mixtures. However, a refined mixture assessment based on the sum of toxic units at species level indicated no unacceptable risks, and allowed for a safety margin of more than factor 10, not taking into account any dilution of WWTP effluents by surface waters. Individual substances, namely climbazole, fenofibric acid and fluoxetine, were dominating the risks of the investigated mixtures, while added risk due to the mixture was found to be low with the risk quotient being increased by less than factor 2. Yet, uncertainty remains regarding chronic mixture toxicity in fish, which was not included in the present study. The number and identity of substances composing environmental mixtures such as WWTP effluents is typically unknown. Therefore, a mixture assessment factor is discussed as an option for a prospective ERA of mixtures of unknown composition. © 2018 Elsevier Ltd. All rights reserved.en
dc.format.extent1 Onlineressource
dc.format.mediumonline resource
dc.identifier.doihttps://doi.org/10.60810/openumwelt-1750
dc.identifier.urihttps://openumwelt.de/handle/123456789/5707
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectFlammschutzmittel
dc.subjectKorrosionsschutz
dc.titleProspective environmental risk assessment of mixtures in wastewater
dc.title.alternativeProspective environmental risk assessment of mixtures in wastewater
dc.typeWissenschaftlicher Artikel
dc.type.dcmitext
dc.type.mediumcomputer
dspace.entity.typePublication
local.bibliographicCitation.journalTitleWater Research
local.bibliographicCitation.originalDOI10.1016/j.watres.2018.04.031
local.bibliographicCitation.volume140 (2018), Seite 56-66
local.collectionAufsätze
local.contributor.authorId02110522
local.contributor.authorId02175710
local.contributor.authorId00307443
local.contributor.authorId02152711
local.contributor.authorId00376548
local.identifier.catalogId02463313
local.ingest.leader07162naa a2200000uu 4500
local.jointTitlePROSPECTIVE ENVIRONMENTAL RISK ASSESSMENT OF MIXTURES IN WASTEWATER
local.sourcecatalog
local.staffPublicationtrue
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relation.isAuthorOfPublication.latestForDiscovery842dbf5b-2d77-4fa3-94cf-327976f2ecf2
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