Toward a comprehensive global emission inventory of C4–C10 perfluoroalkane sulfonic acids (PFSAs) and related precursors: focus on the life cycle of C8-based products and ongoing industrial transition

Wang, Z.; Boucher, J.M.; Scheringer, M.; Cousins, I.T.; Hungerbuehler, K.
2017 | Environ. Sci. Technol. | 18 (51) (4482-4493)

Assessment of dietary exposure to organohalogen contaminants, legacy and emerging flame retardants in a Norwegian cohort

Xu, F.; Tay, J. H.; Covaci, A.; Padilla-Sanchez, J. A.; Papadopoulou, E.; Haug, L. S.; Neels, H.; Sellstrom, U.; de Wit, C. A.
2017 | Environ Int | 102 (236-243)

Polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), emerging halogenated flame retardants (EHFRs) and organophosphate flame retardants (PFRs) were detected in 24h duplicate diet samples from a Norwegian cohort (n=61), with concentrations ranging from

Water-to-air transfer of branched and linear PFOA: Influence of pH, concentration and water type

Johansson, J.H.; Yan, H.; Berger, U.; Cousins, I.T.
2017 | Emerging Contaminants | 3 (1) (46-53)

Temperature versus hydrologic controls of chemical weathering fluxes from United States forests

Peter A. Raymond
2017 | Chem. Geol.

Chemical weathering is a dominant control on modern inland water chemistry and global element budgets over geologic time scales. Due to its central role in the earth's biogeochemistry it remains an intense area of interest. Understanding the controls on chemical weathering is difficult because it has many drivers with overlapping temporal and spatial signals. Of particular interest is the relationship between chemical weathering fluxes and global temperatures due to a negative feedback loop where warmer temperatures leads to more chemical weathering and its associated atmospheric CO2 consumption (Berner et al., 1983). Recently it has been proposed that this negative feedback loop is indirect where the acceleration of the hydrologic cycle by increased global temperatures leads to higher chemical weathering and atmospheric CO2 consumption (Maher and Chamberlain, 2014). Here, fluxes of all major cations and anions are calculated for 150 forested watersheds smaller than 500 km2 in order to explore controls on chemical weathering from United States forests. Relationships between watershed hydrology, ion ratios and pH are reported that explain a large amount of across site variation in bicarbonate fluxes. Furthermore, across all watersheds ~ 32% of the cation flux is not balanced by bicarbonate but by sulfate. Paired alkalinity, temperature and discharge data are used to determine a temperature sensitivity of chemical weathering across 51 forested watersheds with a minimum of 70 measurements. The temperature sensitivity of bicarbonate fluxes is absent at low flow conditions because long residence times leads to chemical equilibrium and transport limitation. As discharge increases and residence time decreases, the temperature sensitivity of chemical weathering is released from transport limitation. The temperature sensitivity then increases with discharge until it levels off at high discharges as the system becomes reaction limited. Records of daily discharge, watershed discharge to flux relationships, and the temperature sensitivity are then used to estimate how chemical fluxes would change with a 20% increase in discharge, and 10° increase in temperature global change scenario. Not surprisingly it is found that increased discharge leads to higher weathering fluxes. Interestingly, wetter years have a higher temperature sensitivity due to a release of the temperature sensitivity from transport limitation. This coupled with a strong direct temperature effect leads to an approximately equal response from temperature and increased discharge using this scenario of global change. Thus periods of time and regions that are subject to both warm and wet conditions may have a particularly strong control on weathering fluxes.

Case study on screening new emerging pollutants in urine and nails.

Alves, A.; Giovanoulis, G.; Nilsson, U.; Erratico, C.; Lucattini, L.; Haug, L.; Jacobs, G.; de Wit, C.A.; Leonards, P.; Covaci, A.; Magnér, J.; Voorspoels, S.
2017 | Environ. Sci. Technol. | 51 (4046-4053)

Case Study on Screening Emerging Pollutants in Urine and Nails

Alves A; Giovanoulis G; Nilsson U; Erratico C; Lucattini L; Haug LS; Jacobs G; de Wit CA; Leonards PEG; Covaci A; Magner J; Voorspoels S
2017 | Environ. Sci. Technol.

Aerobic biodegradation of 2 fluorotelomer sulfonamide–based aqueous film–forming foam components produces perfluoroalkyl carboxylates

Lisa A. D'Agostino; Scott A. Mabury
2017 | Environ. Toxicol. Chem. | 36 (8) (2012-2021)

The biodegradation of 2 common fluorotelomer surfactants used in aqueous film forming foams (AFFFs), 6:2 fluorotelomer sulfonamide alkylamine (FTAA) and 6:2 fluorotelomer sulfonamide alkylbetaine (FTAB), was investigated over 109 d with aerobic wastewater-treatment plant (WWTP) sludge. Results show that biodegradation of 6:2 FTAA and 6:2 FTAB produces 6:2 fluorotelomer alcohol (FTOH), 6:2 fluorotelomer carboxylic acid (FTCA), 6:2 fluorotelomer unsaturated carboxylic acid (FTUCA), 5:3 FTCA, and short-chain perfluoroalkyl carboxylates (PFCAs). Additional degradation products included 6:2 fluorotelomer sulfonamide (FTSAm), which was a major degradation product in the presence of either active or sterilized sludge, whereas 6:2 fluorotelomer sulfonate (FTSA) production was measured with sterilized sludge only. Six additional degradation products were tentatively identified by quadrupole time-of-flight mass spectrometry (qTOF-MS) and attributed to N-dealkylation and oxidation of 6:2 FTAA.

Phthalates, non-phthalate plasticizers and bisphenols in Swedish preschool dust in relation to children’s exposure

Larsson K; Lindh CH; Jönsson BA; Giovanoulis G; Bibi M; Bottai M; Bergström A; Berglund M
2017 | Environ Int

Passive dosing of triclosan in multi-generation tests with copepods – stable exposure concentrations and effects at the low µg L-1 range

Ribbenstedt, A.; Mustajärvi, L.; Breitholtz, M.; Gorokhova, E.; Mayer, P.; Sobek, A.
2017 | Environ. Toxicol. Chem.

Perfluoroalkyl acids and their precursors in indoor air sampled in children’s bedrooms

Winkens, K.; Koponen, J.; Schuster, J.; Shoeib, M.; Vestergren, R.; Berger, U.; Karvonen, A.M.; Pekkanen, J.; Kiviranta, H.; Cousins, I.T.
2017 | Environ. Pollut. | 222 (423-432)

Estimating uptake of phthalate ester metabolites into the human nail plate using pharmacokinetic modelling

Bui, T.T.; Alves, A.; Palm-Cousins, A.; Voorspoels, S.; Covaci, A.; Cousins, I.T.
2017 | Environ Int | 100 (148-155)

Can the use of deactivated glass fibre filters eliminate sorption artefacts associated with active air sampling of perfluorooctanoic acid?

2017 | Environ. Pollut. | 224 (779-786)

Contact information

Visiting addresses:

Geovetenskapens Hus,
Svante Arrhenius väg 8, Stockholm

Arrheniuslaboratoriet, Svante Arrhenius väg 16, Stockholm (Unit for Analytical and Toxicological Chemistry)

Mailing address:
Department of Environmental Science and Analytical Chemistry (ACES)
Stockholm University
106 91 Stockholm

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Stella Papadopoulou
Science Communicator
Phone +46 (0)8 674 70 11