Temperature response of permafrost soil carbon is attenuated by mineral protection

Gentsch N.; Wild B.; Mikutta R.; Čapek P.; Diáková K.; Schrumpf M.; Turner S.; Minnich C.; Schaarschmidt F.; Shibistova O.; Schnecker J.; Urich T.; Gittel A.; Šantrůčková H.; Bárta J.; Lashchinskiy N.; Fuß R.; Richter A.; Guggenberger G.
2018 | Glob. Change Biol. | 24 (3401-3415)

Sulfluramid use in Brazilian agriculture: A source of per- and polyfluoroalkyl substances (PFASs) to the environment

Rodrigo A Nascimento; Deborah BO Nunoo; Ekhine Bizkarguenaga; Lara Schultes; Itsaso Zabaleta; Jonathan P. Benskin; Saulo Spanó; Juliana Leonel
2018 | Environ. Pollut. | In Press

Dimension of radiocarbon variability within sedimentary organic matter

Bao R. McNichol A. McIntyre C., Xu L., Eglinton T.,
2018 | Radiocarbon

Influence of different acid treatments on radiocarbon contents of sedimentary organic matter

Bao R. McNichol A., Hemingway J., Lardie Gaylord M., Eglinton T.,
2018 | Radiocarbon

Uncertainty quantification of extratropical forest biomass in CMIP5 models over the Northern Hemisphere

Yang, C.-E.; Mao, J.; Hoffman, F.M.; Ricciuto, D.M.; Fu, J.S.; Jones, C.D.; Thurner, M.
2018 | Sci Rep | 8 (10962)

Simplified representations of processes influencing forest biomass in Earth system models (ESMs) contribute to large uncertainty in projections. We evaluate forest biomass from eight ESMs outputs archived in the Coupled Model Intercomparison Project Phase 5 (CMIP5) using the biomass data synthesized from radar remote sensing and ground-based observations across northern extratropical latitudes. ESMs exhibit large biases in the forest distribution, forest fraction, and mass of carbon pools that contribute to uncertainty in forest total biomass (biases range from −20 Pg C to 135 Pg C). Forest total biomass is primarily positively correlated with precipitation variations, with surface temperature becoming equally important at higher latitudes, in both simulations and observations. Relatively small differences in forest biomass between the pre-industrial period and the contemporary period indicate uncertainties in forest biomass were introduced in the pre-industrial model equilibration (spin-up), suggesting parametric or structural model differences are a larger source of uncertainty than differences in transient responses. Our findings emphasize the importance of improved (1) models of carbon allocation to biomass compartments, (2) distribution of vegetation types in models, and (3) reproduction of pre-industrial vegetation conditions, in order to reduce the uncertainty in forest biomass simulated by ESMs.

Perfluoroalkyl acids and their precursors in floor dust of children’s bedrooms – Implications for indoor exposure

Winkens, K.; Giovanoulis, G.; Koponen, J.; Vestergren, R.; Berger, U.; Karvonen, A.M.; Pekkanen, J.; Kiviranta, H.; Cousins, I.T.
2018 | Environ Int | 119 (493-502)

Polychlorinated biphenyls (PCBs) as sentinels for the elucidation of Arctic environmental change processes: a comprehensive review combined with ArcRisk project results

Carlsson, P.; Breivik, K.; Brorström-Lundén, E.; Cousins, I.T.; Christensen, J.; Grimalt, J.O.; Halsall, C.; Kallenborn, R.; Abass, K.; Lammel, G.; Munthe, J.; MacLeod, M.; Øyvind, J-O.; Pawlak, J.; Rautio, A.; Reiersen, L-O., Schlabach, M.; Stemmler, I.; Wilson, S.; Wöhrnschimmel, H.
2018 | Environ Sci Pollut Res | 25 (23) (22499-22528)

Inter-individual, inter-city, and temporal trends of per- and polyfluoroalkyl substances in human milk from Swedish mothers between 1972 and 2016

Elisabeth Nyberg; Raed Awad; Anders Bignert; Caroline Ek; Gerd Sällsten; Jonathan P. Benskin
2018 | Environ. Sci.: Processes Impacts | In Press

A two-dimensional non-comprehensive reversed/normal phase high-performance liquid chromatography/tandem mass spectrometry system for determination of limonene and linalool hydroperoxides

Ahmed Ramzi; Hamid Ahmadi; Ioannis Sadiktsis; Ulrika Nilsson
2018 | J. Chromatogr. A | 1566 (102-110)

A two-dimensional non-comprehensive high-performance liquid chromatographic (HPLC) system coupled to electrospray ionization tandem mass spectrometry was developed for the determination of skin allergenic hydroperoxides of limonene and linalool. These compounds are some major components behind skin sensitization and contact (skin) allergy to fragrances.

Fragrance hydroperoxides usually occur in complex compositions, often as constituents of the natural essential oils added to a large number of commercial products. Their similarities to interfering compounds, many with identical elemental composition, make the determination difficult even when using selective detection methods like mass spectrometry. In this work, a first-dimension chromatographic heart-cut isolation of the hydroperoxides on a reversed-phase HPLC system was combined with a second-dimension normal-phase HPLC system for separation of the hydroperoxides. The intersystem transfer was made by trapping the heart-cut fraction on a short graphitized carbon column, exchanging the mobile phase and back-flushing the hydroperoxides into the second dimension.

Each analysis was performed within 60 min without any pretreatment, except dilution, prior to injection. The obtained instrumental limits of detection (LODs) at a signal-to-noise ratio of 3 were lower than 1.2 ng injected on column and method LODs were below 0.3 ppm. An after-shave product was shown to contain the highest concentrations of the measured hydroperoxides, with 445 ± 23 ppm of total linalool hydroperoxides. This level is likely able to elicit skin reactions in already sensitized individuals.

How does the interfacial behaviour of PFAAs at air-water interfaces influence their distribution, transportation and remediation?

Meng, P.; Deng, S.; Johansson, J.; Cousins, I.T.
2018 | SU

National Meeting of the Swedish Chemical Society | June 17, 2018 | Lund, Sweden

In vitro inhalation bioaccessibility of phthalate esters and alternative plasticisers present in indoor dust using artificial lung fluids In vitro inhalation bioaccessibility of phthalate esters and alternative plasticisers present in indoor dust using artificial lung fluids.

Kademoglou, K.; Giovanoulis, G.; Palm-Cousins, A.; de Wit, C.A.; Haug, L.S.; Williams, A.C.; Magnér, J.; Collins, C.D.
2018 | Environ. Sci. Technol. Lett. | 5 (329-334)

Spatial variation in the atmospheric deposition of perfluoroalkyl acids: source elucidation through analysis of isomer patterns

2018 | Environ. Sci.: Processes Impacts | 20 (997-1006)

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