An (Eco)Toxicity Life Cycle Impact Assessment Framework for Per- And Polyfluoroalkyl Substances
Artikel i vetenskaplig tidskrift, 2020

A framework for characterizing per- and polyfluoroalkyl substances (PFASs) in life cycle impact assessment (LCIA) is proposed. Thousands of PFASs are used worldwide, with special properties imparted by the fluorinated alkyl chain. Our framework makes it possible to characterize a large part of the family of PFASs by introducing transformation fractions that translate emissions of primary emitted PFASs into the highly persistent terminal degradation products: the perfluoroalkyl acids (PFAAs). Using a PFAA-adapted characterization model, human toxicity as well as marine and freshwater aquatic ecotoxicity characterization factors are calculated for three PFAAs, namely perfluorooctanoic acid (PFOA) perfluorohexanoic acid (PFHxA) and perfluorobutanesulfonic acid (PFBS). The model is evaluated to adequately capture long-term fate, where PFAAs are predicted to accumulate in open oceans. The characterization factors of the three PFAAs are ranked among the top 5% for marine ecotoxicity, when compared to 3104 chemicals in the existing USEtox results databases. Uncertainty analysis indicates potential for equally high ranks for human health impacts. Data availability constitutes an important limitation creating uncertainties. Even so, a life cycle assessment (LCA) case study illustrates practical application of our proposed framework, demonstrating that even low emissions of PFASs can have large effects on LCA results.

toxicity

degradation

toxins

environmnetal pollution

environmnetal modeling

Författare

Hanna Holmquist

Chalmers, Teknikens ekonomi och organisation, Miljösystemanalys

Peter Fantke

Ian T. Cousins

Mikołaj Owsianiak

Ioannis Liagkouridis

Stockholms universitet

Gregory Peters

Chalmers, Teknikens ekonomi och organisation, Miljösystemanalys

Environmental Science & Technology

0013-936X (ISSN) 1520-5851 (eISSN)

Subsitution i praktiken av prioriterade flourkemikalier för att eliminera diffusa källor (SUPFES)

Formas, 2013-01-01 -- 2017-12-31.

Stockholms läns landsting, 2017-01-01 -- 2020-12-31.

Drivkrafter

Hållbar utveckling

Ämneskategorier

Biokemi och molekylärbiologi

Ekologi

Miljövetenskap

DOI

10.1021/acs.est.9b07774

Mer information

Skapat

2020-05-14