Publikasjoner

EIF-Air. Emissions from four different sources in the North Sea and the Norwegian Sea. NILU OR

Knudsen, S.; Mc. Innes, H.; Løken, T.; Larssen, T.; Høgåsen, T.

Eight EIONET workshop on air quality management and assessment, Oslo, 6-7 November 2003. Proceedings.

Barrett, K.; Larssen, S.; de Leeuw, F.

Eksempel på et Kolarctic prosjekt - Food and health security in the Norwegian, Russian and the Finnish border regions.

Heimstad, E.S.

Ekspert: Slik blir vi skadet av UV-stråling når sola gløder

Svendby, Tove Marit (intervjuobjekt); Kristiansen, Martin Næss (journalist)

Eksponeringsutvikling av lokal luftkvalitet i Oslo. Anvendelse av AirQUIS. Powerpoint-presentasjon. NILU F

Jablonska, H.B.

Electrocatalytic performance of oxygen-activated carbon fibre felt anodes mediating degradation mechanism of acetaminophen in aqueous environments

Jakobczyk, Pawel; Skowierzak, Grzegorz; Kaczmarzyk, Iwona; Nadolska, Malgorzata; Wcislo, Anna; Lota, Katarzyna; Bogdanowicz, Robert; Ossowski, Tadeusz; Rostkowski, Pawel; Lota, Gregorz; Ryl, Jacek

Carbon felts are flexible and scalable, have high specific areas, and are highly conductive materials that fit the requirements for both anodes and cathodes in advanced electrocatalytic processes. Advanced oxidative modification processes (thermal, chemical, and plasma-chemical) were applied to carbon felt anodes to enhance their efficiency towards electro-oxidation. The modification of the porous anodes results in increased kinetics of acetaminophen degradation in aqueous environments. The utilised oxidation techniques deliver single-step, straightforward, eco-friendly, and stable physiochemical reformation of carbon felt surfaces. The modifications caused minor changes in both the specific surface area and total pore volume corresponding with the surface morphology.

A pristine carbon felt electrode was capable of decomposing up to 70% of the acetaminophen in a 240 min electrolysis process, while the oxygen-plasma treated electrode achieved a removal yield of 99.9% estimated utilising HPLC-UV-Vis. Here, the electro-induced incineration kinetics of acetaminophen resulted in a rate constant of 1.54 h−1, with the second-best result of 0.59 h−1 after oxidation in 30% H2O2. The kinetics of acetaminophen removal was synergistically studied by spectroscopic and electrochemical techniques, revealing various reaction pathways attributed to the formation of intermediate compounds such as p-aminophenol and others.

The enhancement of the electrochemical oxidation rates towards acetaminophen was attributed to the appearance of surface carbonyl species. Our results indicate that the best-performing plasma-chemical treated CFE follows a heterogeneous mechanism with only approx. 40% removal due to direct electro-oxidation. The degradation mechanism of acetaminophen at the treated carbon felt anodes was proposed based on the detected intermediate products. Estimation of the cost-effectiveness of removal processes, in terms of energy consumption, was also elaborated. Although the study was focussed on acetaminophen, the achieved results could be adapted to also process emerging, hazardous pollutant groups such as anti-inflammatory pharmaceuticals.

Elsevier

Electrochemical reactivity and wetting properties of anodes made from anisotropic and isotropic cokes.

Sommerseth, C.; Thorne, R.J.; Ratvik, A.P.; Sandnes, E.; Rørvik, S.; Lossius, L.P.; Linga, H.; Svensson, A.M.

Elemental and organic carbon in PM10: A one year measurement campaign within the European Monitoring and Evaluation Programme EMEP.

Yttri, K. E.; Aas, W.; Bjerke, A.; Cape, J. N.; Cavalli, F.; Ceburnis, D.; Dye, C.; Emblico, L.; Facchini, M. C.; Forster, C.; Hanssen, J. E.; Hansson, H. C.; Jennings, S. G.; Maenhaut, W.; Putaud, J. P.; Tørseth, K.

Elemental and organic carbon in PM10: A one year measurements campaign within the European monitoring and evaluation programme EMEP.

Yttri, K.E.; Aas, W.; Bjerke, A.; Ceburnis, D.; Dye, C.; Facchini, M.C.; Forster, C.; Hanssen, J.E.; Hansson, H.C.; Jennings, S.G.; Maenhaut, W.; Tørseth, K.

Elevated concentrations of mercury in mosses growing at the Arctic coast of Norway - a phenomenon caused by Arctic mercury depletion events? Poster presentation. NILU PP

Berg, T.; Aspmo, K.; Steinnes, E.

Elevated stratopause events and downward transport of nitrogen oxides. NILU F

Orsolini, Y.

Elevated stratopause events in the current and a future climate: A chemistry-climate model study

Scheffler, Janice; Ayarzagüena, Blanca; Orsolini, Yvan J.; Langematz, Ulrike

The characteristics and driving mechanisms of Elevated Stratopause Events (ESEs) are examined in simulations of the ECHAM/MESSy Atmospheric Chemistry (EMAC) chemistry-climate model under present and projected climate conditions. ESEs develop after sudden stratospheric warmings (SSWs) in boreal winter. While the stratopause descends during SSWs, it is reformed at higher altitudes after the SSWs, leading to ESEs in years with a particularly high new stratopause. EMAC reproduces well the frequency and main characteristics of observed ESEs. ESEs occur in 24% of the winters, mostly after major SSWs. They develop in stable polar vortices due to a persistent tropospheric wave forcing leading to a prolonged zonal wind reversal in the lower stratosphere. By wave filtering, this enables a faster re-establishment of the mesospheric westerly jet, polar downwelling and a higher stratopause. We find the presence of a westward-propagating wavenumber-1 planetary wave in the mesosphere following the onset, consistent with in-situ generation by large-scale instability. By the end of the 21st century, the number of ESEs is projected to increase, mainly due to a sinking of the original stratopause after strong tropospheric wave forcing and planetary wave dissipation at lower levels. Future ESEs develop preferably in more intense and cold polar vortices, and tend to be shorter. While in the current climate, planetary wavenumber-2 contributes to the forcing of ESEs, future wave forcing is dominated by wavenumber-1 activity as a result of climate change. Hence, a persistent wave forcing seems to be more relevant for the development of an ESE than the wavenumber decomposition of the forcing.

Elsevier