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Results from the Swedish National Screening Programme Antibacterial substances
Executive, Forskningsinstitut, IVL Swedish Environmental Research Institute.
Executive, Forskningsinstitut, IVL Swedish Environmental Research Institute.
Executive, Forskningsinstitut, IVL Swedish Environmental Research Institute.
Executive, Forskningsinstitut, IVL Swedish Environmental Research Institute.
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2014 (English)Report (Other academic)
Abstract [sv]

IVL Svenska Miljöinstitutet har under 2013 på uppdrag av Naturvårdsverket utfört en screeningstudie av antibakteriella substanser i miljön. De ämnen som ingick i studien var triklosan, triklokarban, silver och nedbrytningsprodukterna metyl-triklosan, och 3,4-dikloranilin (3,4-DCA).

Det övergripande syftet med screeningen var att bestämma koncentrationer av de utvalda ämnena i kommunala avloppsreningsverk och bedöma förekomst och nivåer i recipienter i närheten av reningsverken.

Prover togs vid sex olika kommunala reningsverk och omfattade inkommande och utgående avloppsvatten samt slam. Dessutom ingick sediment och fisk som samlats in i närheten av reningsverkens utlopp. Totalt analyserades 30 prover.

Triklosan hittades i alla provtagningsmatriser, och förekom konsekvent i högst koncentrationer av de organiska ämnena, undantaget sediment, där koncentrationerna av triklokarban var i samma storleksordning. Koncentrationerna av triklosan i slam (890-1800 ng/g dw) och inkommande (81-130 ng/l) och utgående (27-52 ng/l) vatten från reningsverk låg i samma storleksordning som tidigare rapporterade halter och indikerar att den tidigare observerade nedåtgående trenden i reningsverksslam tycks börja plana ut.

Metyl-triklosan, återfanns främst i slam, med halter motsvarande ungefär en faktor 200 lägre än koncentrationerna av triklosan.

Triklokarban var allmänt förekommande i inkommande vatten, slam och sediment, men kunde inte detekteras i biota och endast i ett prov av utgående vatten. Halterna i sediment var i samma nivå som triklosan medan halterna i slam och inkommande vatten var en faktor 7,5 respektive 4 lägre än triklosan.

3,4-DCA (och även 4-kloranilin, en ytteliggare nedbrytningsprodukt av triklokarban), kunde inte detekteras i något prov, men detektionsgränserna var högre för dessa föreningar jämfört med moderföreningen. Detektionsgränserna för dessa föreningar var dock betydligt lägre än de koncentrationer av 3,4-DCA som uppmätts i regioner utanför Sverige.

Silver hittades i sediment och slam, men inte i biota eller utgående vatten och endast i ett prov av inkommande vatten till reningsverk. Halterna i slam var i samma storleksordning som tidigare rapporterade koncentrationer.

Abstract [en]

As an assignment from the Swedish Environmental Protection Agency, a screening study of antibacterial substances has been performed during 2013. Substances selected for analysis were triclosan, triclocarban, silver and the degradation products methyl triclosan and 3,4-dicloroaniline (3,4-DCA).

The overall objective of the screening was to determine the concentrations of the selected substances in municipal wastewater treatment plants and to assess the occurrence and levels in recipients and local background stations in the vicinity of municipal waste water treatment plants (WWTPs).

Samples were taken at six different WWTPs and covered influent and effluent water, sludge and sediments and fish collected in the vicinity of the WWTP outlet. A total of 30 samples were analysed.

Triclosan was found in all matrices sampled, and consistently occurred in highest concentrations of the organic substances, with the exception of sediment, where triclocarban concentrations were in the same order of magnitude. The triclosan concentrations in sludge (890-1800 ng/g dw) incoming water (81-130 ng/l) and outgoing water (27-52 ng/l) from WWTPs were similar to previously reported concentrations and indicate that the decreasing trend in sludge appears to be levelling off.

Methyl-triclosan was mainly present in sludge, and the levels were about a factor of 200 lower than triclosan concentrations.

Triclocarban was commonly found in WWTP influents, sludge and sediments but was not found in biota and only in one effluent sample. The sediment concentrations were comparable to the triclosan levels whereas concentrations in sludge and WWTP influents were a factor of 7.5 and 4 lower, respectively.

3,4-DCA (and also 4-chloroaniline, another degradation product of triclocarban), were not detected in any sample, but the quantification limits were higher for these compounds than for the mother compound. The quantification limits were, however, substantially lower than measured concentrations of 3,4-DCA in regions outside of Sweden.

Silver was found in sediment and sludge, but not in biota or effluent water and only in one sample of WWTP influent water. The concentrations in sludge were similar to previously reported values.

Place, publisher, year, edition, pages
2014. , 52 p.
Series
IVL Report, C 56
Keyword [sv]
Triklosan, metyltriklosan, triklokarban, dikloranilin, silver, avloppsvatten, slam, sediment, fisk
National Category
Environmental Sciences
Research subject
Finance, National; Miljöövervakningens programområden, Toxic; Toxic, Screening; Environmental Objectives, A Non-Toxic Environment
Identifiers
URN: urn:nbn:se:naturvardsverket:diva-2227OAI: oai:DiVA.org:naturvardsverket-2227DiVA: diva2:773517
Available from: 2014-12-19 Created: 2014-12-19 Last updated: 2014-12-19

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