Publikasjoner

Chlorobornanes in biota samples related to a typical freshwater food web at Bjørnøya (Bear Island). NILU F

Kallenborn, R.; Evensen, A.; Herzke, D.; Christensen, G.; Schlabach, M.

Chlorinated paraffins in urban air in Nordic countries

Bohlin-Nizzetto, Pernilla; Borgen, Anders; Nipen, Maja

In 2022, the Joint Nordic screening group decided to perform a Nordic study on short-, medium- and long-chain chlorinated paraffins (SCCPs, MCCPs, LCCPs) in urban air. A previous study performed on behalf of screening group in 2019 observed higher concentrations of chlorinated paraffins (CPs) in air samples from an urban site than from remote sites (Schlabach et al. 2022). It was then suggested that tire wear particles could be the source for the elevated urban concentrations.

The focus of the study in 2022 was to collect data to improve the understanding of sources for CPs in air by: (1) comparing concentrations measured in wintertime when studded tires are used and in summertime when normal tires are used, (2) comparing data from three capitals in the Nordic countries, and (3) compare urban air concentrations to air concentrations in a car tire testing facility. All the member countries were invited to participate but based on the possibilities to collect active air samples in urban locations, it was decided to collect air samples from Helsinki (Finland), Reykjavik and Reykjanesbær (Iceland) and Oslo (Norway). Samples were collected in February–March 2022 and May–August 2022. The sampling time for each sample was 48 hrs and 3–6 samples were collected per site and season.

Nordic Council of Ministers

Chlorinated paraffins in polar cod and capelin from the Barents Sea

Giebichenstein, Julia; Warner, Nicholas Alexander; Varpe, Øystein; Andersen, Tom; Gabrielsen, Geir W.; Borgå, Katrine

Chlorinated paraffins and dechloranes in free-range chicken eggs and soil around waste disposal sites in Tanzania

Haarr, Ane; Nipen, Maja; Mwakalapa, Eliezer Brown; Borgen, Anders; Mmochi, Aviti J.; Borgå, Katrine

Electronic waste is a source of both legacy and emerging flame retardants to the environment, especially in regions where sufficient waste handling systems are lacking. In the present study, we quantified the occurrence of short- and medium chain chlorinated paraffins (SCCPs and MCCPs) and dechloranes in household chicken (Gallus domesticus) eggs and soil collected near waste disposal sites on Zanzibar and the Tanzanian mainland. Sampling locations included an e-waste facility and the active dumpsite of Dar es Salaam, a historical dumpsite in Dar es Salaam, and an informal dumpsite on Zanzibar. We compared concentrations and contaminant profiles between soil and eggs, as free-range chickens ingest a considerable amount of soil during foraging, with potential for maternal transfer to the eggs. We found no correlation between soil and egg concentrations or patterns of dechloranes or CPs. CPs with shorter chain lengths and higher chlorination degree were associated with soil, while longer chain lengths and lower chlorination degree were associated with eggs. MCCPs dominated the CP profile in eggs, with median concentrations ranging from 500 to 900 ng/g lipid weight (lw) among locations. SCCP concentrations in eggs ranged from below the detection limit (LOD) to 370 ng/g lw. Dechlorane Plus was the dominating dechlorane compound in all egg samples, with median concentrations ranging from 0.5 to 2.8 ng/g lw. SCCPs dominated in the soil samples (400–21300 ng/g soil organic matter, SOM), except at the official dumpsite where MCCPs were highest (65000 ng/g SOM). Concentrations of dechloranes in soil ranged from below LOD to 240 ng/g SOM, and the dominating compounds were Dechlorane Plus and Dechlorane 603. Risk assessment of CP levels gave margins of exposure (MOE) close to or below 1000 for SCCPs at one location.

Pergamon Press

Chlorierte organische Schadstoffe in Eiern norwegischer Greifvögel. Erste Ergebnisse einer Langzeitüberwachungsstudie.

Kallenborn, R.; Herzke, D.; Nygård, T.

Chiral polychlorinated biphenyls are biotransformed enantioselectively by mammalian cytochrome P-450 isozymes to form hydroxylated metabolites.

Warner, N.A.; Martin, J.W.; Wong, C.

Chiral environmental pollutants. Trace analysis and ecotoxicology.

Kallenborn, R.; Hühnerfuss, H.

Chiral contaminants in the Arctic environment. Abstract. NILU F

Kallenborn, R.

Children and adults in cities: differences in exposure to particulate matter. NILU PP

Fløisand, I.; Mc Innes, H.; Broday, D.; Lützenkirchen, S.; Holländer, W.; Bartonova, A.

Chemistry in aircraft plumes. Poster presentation.

Kraabøl, A.-G.; Konopka, P.; Stordal, F.; Knudsen, S.

Chemistry and dynamics of the secondary ozone layer during the sudden stratospheric warming in the southern hemisphere in 2002, using WACCM-SD.

Smith-Johnsen, C.; Limpasuvan, V.; Orsolini, Y.; Stordal, F.

Chemicals of emerging concern (CECs) in coastal waters: Environmental impact & Management strategies

Kallenborn, Roland; Ali, Aasim M.; Hartz, William Frederik; Zhang, Zifeng; Li, Yifan