Mattias Bäckström

Mattias Bäckström
Tjänstetitel: Universitetslektor
Organisation: Institutionen för naturvetenskap och teknik
E-post: This is an email address
Telefon: 019-303965, 0761 413234
Rumsnummer: B3303

Forskargrupper

Publikationer

Artiklar i tidskrifter |  Böcker |  Doktorsavhandlingar, sammanläggningar |  Kapitel i böcker, del av antologier |  Konferensbidrag |  Manuskript | 

Artiklar i tidskrifter

Allard, B. , Bäckström, M. , Karlsson, S. & Grawunder, A. (2014). Neutralisation of an acidic  pit lake by alkaline waste products. Environmental science and pollution research international, 21, 6930-6938.

Saqib, N. & Bäckström, M. (2014). Trace element partitioning in ashes from boilers firing pure wood or mixtures of solid waste with respect to fuel composition, chlorine content and temperature. Waste Management, 34 (12), 2505-2519.

Allard, B. , Bäckström, M. , Karlsson, S. & Grawunder, A. (2013). Neutralization of an acidic pit lake by alkaline waste products. Environmental science and pollution research international, 21 (11), 6930-6938.

Sartz, L. & Bäckstrom, M. (2013). Treatment of Acidic and Neutral Metal-Laden Mine Waters with Bone Meal Filters. Mine Water and the Environment, 32 (4), 293-301.

Henriksson, S. , Hagberg, J. , Bäckström, M. , Persson, I. & Lindström, G. (2013). Assessment of PCDD/Fs levels in soil at a contaminated sawmill site in Sweden: a GIS and PCA approach to interpret the contamination pattern and distribution. Environmental Pollution, 180, 19-26.

Angelstam, P. , Andersson, K. , Isacson, M. , Gavrilov, D. V. , Axelsson, R. , Bäckstrom, M. , Degerman, E. , Elbakidze, M. & et al. (2013). Learning about the history of landscape use for the future: consequences for ecological and social systems in Swedish Bergslagen. Ambio, 42 (2), 146-159.

Bäckström, M. & Sartz, L. (2011). Mixing of acid rock drainage with alkaline ash leachates: fate and immobilisation of trace elements. Water, Air and Soil Pollution, 222 (1), 377-389.

Gustafsson, J. P. , Dässman, E. & Bäckström, M. (2009). Towards a consistent geochemical model for prediction of uranium(VI) removal from groundwater by ferrihydrite. Applied Geochemistry, 24 (3), 454-462.

Bäckström, M. , Bohlin, H. , Karlsson, S. & Holm, N. (2006). Element (Ag, Cd, Cu, Pb, Sb, Tl and Zn), element ratio and lead isotope profiles in a sediment affected by a mining operation episode during the late 19th century. Water, Air and Soil Pollution, 177 (1-4), 285-311.

Karlsson, S. , Grahn, E. , Düker, A. & Bäckström, M. (2006). Historical pollution of seldom monitored trace elements in Sweden - Part A: sediment properties and chronological indicators. Journal of Environmental Monitoring, 8 (7), 721-731.

Bäckström, M. , Karlsson, S. , Bäckman, L. , Folkeson, L. & Lind, B. (2004). Mobilisation of heavy metals by deicing salts in a roadside environment. Water Research, 38 (3), 720-732.

Salih, I. , Bäckström, M. , Karlsson, S. , Lund, E. & Pettersson, H. B. L. (2004). Impact of fluoride and other aquatic parameters on radon concentration in natural waters. Applied Radiation and Isotopes, 60 (1), 99-104.

Benyamine, M. , Bäckström, M. & Sandén, P. (2004). Multi-objective environmental management in constructed wetlands. Environmental Monitoring & Assessment, 90 (1-3), 171-185.

Bäckström, M. , Karlsson, S. & Allard, B. (2004). Metal leachability and anthropogenic signal in roadside soils estimated from sequential extraction and stable lead isotopes. Environmental Monitoring & Assessment, 90 (1-3), 135-160.

Bäckström, M. , Nilsson, U. , Håkansson, K. , Allard, B. & Karlsson, S. (2003). Speciation of heavy metals in road runoff and roadside total deposition. Water, Air and Soil Pollution, 147 (1-4), 343-366.

Bäckström, M. , Börjesson, E. & Karlsson, S. (2002). Diurnal variations of abiotic parameters in a stream, recipient for drainage water in Ranstad, southwest Sweden. Journal of Environmental Monitoring, 4 (5), 772-777.

Dahlén, J. , Karlsson, S. , Bäckström, M. , Hagberg, J. & Pettersson, H. (2000). Determination of nitrate and other water quality parameters in groundwater from UV/Vis spectra employing partial least squares regression. Chemosphere, 40 (1), 71-77.

Dahlén, J. , Bäckström, M. , Ephraim, J. , Borén, H. & Allard, B. (1999). Determination of the molecular weight of fulvic acids by UV/VIS spectroscopy. Chemosphere, 38 (4), 783-794.

Böcker

Allard, B. , Andrusikiewicz, W. , Bäckström, M. , Bilstad, T. , Cala, M. , Cholewa, M. , Drielsma, J. , Galos, K. & et al. (2013). Mining waste management in the Baltic Sea Region: Min-Novation project. Krakow: Wydawnictwa AGH.

Doktorsavhandlingar, sammanläggningar

Bäckström, M. (2002). On the chemical state and mobility of lead and other trace elements at the biogeosphere/technosphere interface. (Doctoral dissertation). (Sammanläggning) Örebro: Örebro universitetsbibliotek.

Kapitel i böcker, del av antologier

Allard, B. , Bäckström, M. , Cala, M. & Ostreca, A. (2013). Reclamation and revitalisation of waste dumps or land after waste recovery. I: Cala M, Mining Waste Management in the Baltic Sea Region (ss. 195-236). Krakow: Wydawnictwa AGH.

Konferensbidrag

Bäckström, M. & Sartz, L. (2015). Uranium leaching from a burning black shale deposit – present conditions and future scenarios. I: Merkel, B.J. and Arab, A., Uranium – Past and Future Challenges. Konferensbidrag vid Proceedings of the 7th International Conference on Uranium Mining and Hydrogeology, September 21-25, 2014 (ss. 47-54). Springer Publishing Company.

Saqib, N. & Bäckström, M. (2015). Uranium in 31 Swedish ashes – differences between boiler type and fuels. I: Merkel, B.J. and Arab, A., Uranium – Past and Future Challenges. Konferensbidrag vid Proceedings of the 7th International Conference on Uranium Mining and Hydrogeology, Freiberg, Germany, September 21-25, 2014 (ss. 745-750).

Karlsson, L. , Allard, B. , Sjöberg, V. & Bäckström, M. (2014). Water quality in a black shale mining area – effects of pH and natural organic acids on weathering and subsequent metal releases. I: Proc IMWA 2014. Konferensbidrag vid 12th Internat. Mine Water Association Congress, IMWA 2014, Aug 11-22, Xuzhou, China (ss. 1 p-.

Karlsson, S. , Sjöberg, V. , Ogar, A. & Bäckström, M. (2014). Leachability of Cu, Zn, As, Ba and Pb from refuse in the Zelazny Most tailings dam. Konferensbidrag vid An Interdisciplinary Response to Mine Water Challenges (ss. 121-125). Xuzhou: China University of Mining and Technology Press.

Bäckström, M. & Sartz, L. (2014). Permanent under water storing of weathered mine waste after removal of fine fraction and addition of ash. Konferensbidrag vid An Interdisciplinary Response to Mine Water Challenges (ss. 711-714). Xuzhou: China University of Mining and Technology Press.

Sartz, L. & Bäckström, M. (2014). Chemistry and environmental science research as a part of education – an example from Sweden. Konferensbidrag vid 1st International Congress and Exhibition on Current Trends on Science and Technology Education (ss. 27-32).

Fahlqvist, L. , Bäckström, M. , Sartz, L. & Allard, B. (2013). Removal of uranium from a neutral mine water using uncoated and iron oxyhydroxide coated iron tailings. I: Brown A, Figueroa L, Wolkersdorfer C, Reliable Mine Water Technology. Konferensbidrag vid International Mine Water Association Conference, Aug. 5-9, Golden, USA (ss. 551-556). IMWA & QuarkXPress.

Karlsson, L. , Karlsson, S. , Allard, B. , Sjöberg, V. & Bäckström, M. (2013). Release of metals from unprocessed and processed black shale due to natural weathering. I: Brown A, Figueroa L, Wolkersdorfer C, Reliable Mine Water Technology. Konferensbidrag vid International Mine Water Association Conference, Aug. 5-9, Golden, USA (ss. 391-396). IMWA & QuarkXPress.

Saqib, N. & Bäckström, M. (2013). Leaching of Zn, Cu and Pb from oxidised sulphidic mine waste as a function of temperature, L/S ratio and leaching reagents. I: Goldschmidt. Konferensbidrag vid Goldschmidt, Florence, Italy, August 25-30, 2013.

Falhqvist, L. , Bäckström, M. , Sartz, L. & Allard, B. (2013). Removal of uranium from a neutral mine water using uncoated and iron oxyhydroxide coated iron tailings. Konferensbidrag vid Reliable Mine Water Technology (Vol I) (ss. 551-557). Denver, Colorado: Publication Printers.

Sartz, L. & Bäckström, M. (2013). Impact of temperature on weathering rates – a long term kinetic study on waste rock from Bergslagen, Sweden. Konferensbidrag vid Reliable Mine Water Technology (Vol I) (ss. 463-469). Denver, Colorado: Publication Printers.

Karlsson, L. , Karlsson, S. , Allard, B. , Sjöberg, V. & Bäckström, M. (2013). Release of metals from unprocessed and processed black shale due to natural weathering. Konferensbidrag vid Reliable Mine Water Technology (Vol I) (ss. 391-397). Denver Colorado: Publication Printers.

Bäckström, M. & Sartz, L. (2013). Fly ash injection into weathered mine waste. Konferensbidrag vid Reliable Mine Water Technology (Vol I) (ss. 513-519). Denver, Colorado: Publication Printers.

Sartz, L. , Bäckström, M. , Sädbom, S. , Karlsson, S. & Allard, B. (2012). Applicability and  suitability of different alkaline by-products in historic mine sites remediation. I: Price WA, Hogan C, Tremblay G, 9th Internat. Conf. on Acid Rock Drainage  ICARD 2012. Konferensbidrag vid 9th Internat. Conf. on Acid Rock Drainage ICARD 2012, 20-26 May, Ottawa, Canada (ss. 682-693). MEND & Curran Ass. Inc.

Fahlqvist, L. , Sartz, L. & Bäckström, M. (2012). Removal of zinc and lead from a neutral mine water using iron tailings and iron oxyhydroxide coated iron tailings. Konferensbidrag vid International Mine Water Association Symposium, Bunbury, Australia (ss. 584A-584G).

Sartz, L. & Bäckström, M. (2012). Treatment of acidic and neutral metal-laden mine waters with bone meal filters. Konferensbidrag vid International Mine Water Association Symposium, Bunbury, Australia (ss. 643-650).

Sartz, L. , Larsson, E. & Bäckström, M. (2012). Alkaline treatment of ARD – carbonate and hydroxide alkalinities in sequence. Konferensbidrag vid 9th International Conference on Acid Rock Drainage, Ottawa, Canada.

Sartz, L. , Bäckström, M. , Sädbom, S. , Karlsson, S. & Allard, B. (2012). Applicability and suitability of different alkaline by-products in historic mine sites remediation. Konferensbidrag vid 9th International Conference on Acid Rock Drainage, Ottawa, Canada.

Karlsson, L. , Bäckström, M. & Allard, B. (2012). Leaching of sulfidic alum shale waste at different temperatures. I: Price, W.A., Hogan, C. and Tremblay, G., 9th International Conference on Acid Rock Drainage (ICARD 2012). Konferensbidrag vid 9th International Conference on Acid Rock Drainage, Ottawa, Canada, 20 - 26 May 2012 (ss. 1015-1025). Red Hook, NY: Curran.

Bäckström, M. & Sädbom, S. (2012). Suggestion for a protocol for detailed investigation of historical mine sites. I: Price, W.A., Hogan, C. and Tremblay, G., 9th International Conference on Acid Rock Drainage (ICARD 2012). Konferensbidrag vid 9th International Conference on Acid Rock Drainage, Ottawa, Canada, 20 - 26 May 2012 (ss. 1340-1350). Red Hook, NY: Curran.

Bäckström, M. , Häller, S. & Allard, B. (2011). Geochemical processes in a historical alum shale dump, Kvarntorp. I: Sarala P, Ojala VJ, Porsanger M-L, Proc. 25th Internat. Applied Geochem. Symp. 2011. Konferensbidrag vid 25th Internat. Applied Geochem. Symp., August 22-26 2011, Rivaniemi, Finland (ss. 97, 6p CD-Rom-. Vuorimiesyhdistys.

Sartz, L. , Larsson, E. , Sädbom, S. & Bäckström, M. (2011). Weathering of waste rock in different climatic conditions: A kinetic freeze/thaw and humidity cell experiment. I: Rüde, T.R., Freund, A. and Wolkersdorfer, C., Mine water Managing the challenges. Konferensbidrag vid 11th IMWA congress, Mine Water – Managing the Challenges, Aachen, Germany, September 4-11, 2011 (ss. 453-456). Aachen: RWTH.

Bäckström, M. , Sartz, L. , Larsson, E. & Karlsson, S. (2011). Properties of alkaline materials for injection into weathered mine waste piles: methods and initial pilot trials. I: Rüde, Thomas R.; Freund, Antje; Wolkersdorfer, Christian, Mine water managing the challenges. Konferensbidrag vid 11th IMWA congress, Mine Water – Managing the Challenges, Aachen, Germany, September 4-11, 2011 (ss. 265-269). Aachen: RWTH.

Allard, B. , Bäckström, M. , Häller, S. , Panova, E. , Grawunder, A. & Karlsson, S. (2011). Water chemistry and trace metal concentrations in an acidic alum shale pit lake: effects of liming. I: Trude R.Rüde, Antje Freund, Christian Wolkersdorfer, Mine water managing the challenges. Konferensbidrag vid 11th IMWA congress, Mine Water – Managing the Challenges, Aachen, Germany, September 4-11, 2011 (ss. 503-508).

Sartz, L. , Bäckström, M. , Karlsson, S. , Sädbom, S. & Allard, B. (2010). Alkaline by-products to ameliorate oxidized sulphidic mine waste and ARD. I: Proc. EU Mine Drainage Research Exchange Conf. PADRE, June 11, Freiberg, Germany. Konferensbidrag vid EU Mine Drainage Research Exchange Conf. PADRE,June 11, Freiberg, Germany (ss. 1 p-.

Allard, B. , Bäckström, M. , Karlsson, S. , Sartz, L. , Sjöberg, V. & Sädbom, S. (2010). Control of metal releases from historic sulphidic mine waste – experience from the test site at the Ljusnarsberg mine field, Sweden (Project Bergskraft Bergslagen).. I: Proc. EU Mine Drainage Research Exchange Conf. PADRE, June 11, Freiberg, Germany. Konferensbidrag vid EU Mine Drainage Research Exchange Conf. PADRE, June 11, Freiberg, Germany (ss. 1 p-.

Sartz, L. , Bäckström, M. & Karlsson, S. (2010). Alkaline by-products as amendments for stabilization and neutralization of oxidized sulphidic mine waste deposits. I: 34th British Columbia Mine Reclamation & 35th CLRA/ACRSD National Conference. Konferensbidrag vid 34th British Columbia Mine Reclamation & 35th CLRA/ACRSD National Conference, Vancouver, Canada (ss. 10 pages-.

Bäckström, M. , Domeij, J. & Sartz, L. (2010). Flooding of oxidized waste rock amended with alkaline by-products. I: 34th British Columbia Mine Reclamation & 35th CLRA/ACRSD National Conference. Konferensbidrag vid 34th British Columbia Mine Reclamation & 35th CLRA/ACRSD National Conference, Vancouver, Canada (ss. 10 pages-.

Bäckström, M. & Sartz, L. (2010). Stabilization of acid generating waste rock with fly ash: Immobilization of arsenic under alkaline conditions. I: Wolkersdorfer, C. and Freund, A., Mine water & innovative thinking: Proceedings of the International Mine Water Association Symposium, 2010, Sydney, Nova Scotia, Canada. Konferensbidrag vid The International Mine Water Association Symposium, 2010, Sydney, Nova Scotia, Canada (ss. 555-558).

Bäckström, M. (2010). Environmental impact from an alum shale deposit, Kvarntorp, Sweden: Present and future scenarios. I: Wolkersdorfer, C. and Freund, A., Mine water & innovative thinking Proceedings of the International Mine Water Association Symposium, 2010, Sydney, Nova Scotia, Canada. Konferensbidrag vid The International Mine Water Association Symposium, 2010, Sydney, Nova Scotia, Canada (ss. 551-554).

Skogsjö, E. , Allard, B. & Bäckström, M. (2010). Barrier system for treatment of heavy metal drainage at Ranstad, Sweden. I: Mine water & innovative thinking Proceedings of the International Mine Water Association Symposium, 2010, Sydney, Nova Scotia, Canada. Konferensbidrag vid The International Mine Water Association Symposium, 2010, Sydney, Nova Scotia, Canada (ss. 275-278).

Sartz, L. , Bäckström, M. & Allard, B. (2010). On the neutralisation of ARD and acid generating waste rock by different alkalinity sources - carbonate and/or hydroxide. I: Wolkersdorfer, C. and Freund, A., Mine water & innovative thinking Proceedings of the International Mine Water Association Symposium, 2010, Sydney, Nova Scotia, Canada. Konferensbidrag vid The International Mine Water Association Symposium, 2010, Sydney, Nova Scotia, Canada (ss. 263-266).

Bäckström, M. , Sartz, L. , Karlsson, S. & Allard, B. (2010). Prevention of ARD through stabilization of waste rock with alkaline by-products: results from a meso-scale experiment. Konferensbidrag vid Mine Water & Innovative Thinking, Sydney.

Karlsson, S. , Allard, B. & Bäckström, M. (2010). Weathering mechanisms and composition of effluents from a sulphide mine waste deposit after covering: twenty years of field data. I: Christian Wolkersdorfer, Antje Freund, Mine water and innovative thinking proceedings 2010. Konferensbidrag vid International Mine Water Association symposium: Mine Water and Innovative Thinking (IMWA), Sydney, Nova Scotia, Canada, 2010 (ss. 359-362). CBU Press.

Sartz, L. , Bäckström, M. , Karlsson, S. & Allard, B. (2010). Strategy for instant neutralisation and metal immobilisation in ARD. I: Christian Wolkersdorfer, Antje Freund, Mine water and innovative thinking proceedings 2010. Konferensbidrag vid International Mine Water Association symposium: Mine Water and Innovative Thinking (IMWA), Sydney, Nova Scotia, Canada, 2010 (ss. 267-270). CBU Press.

Sartz, L. , Bäckström, M. , Karlsson, S. & Sjöberg, V. (2010). ARD treatment in sequential filter sections: efficiency of different alkaline waste materials. I: Christian Wolkersdorfer, Antje Freund, Mine water and innovative thinking proceedings 2010. Konferensbidrag vid International Mine Water Association symposium: Mine Water and Innovative Thinking (IMWA), Sydney, Nova Scotia, Canada, 2010 (ss. 271-274). CBU Press.

Sartz, L. , Bäckström, M. , Karlsson, S. & Allard, B. (2009). Effect of pH and time on the release of vanadium from LD -slag. I: Proc. SETAC Europe 19th Ann. Meeting, 31 May-4 June, Göteborg  . Konferensbidrag vid SETAC Europe 19th Ann. Meeting, 31 May-4 June, Göteborg (ss. 2 p-.

Allard, B. , Bäckström, M. , Karlsson, S. , Sartz, L. & Sädbom, S. (2009). Strategy for treatment of historic sulphidic mine waste – experiences from the Ljusnarsberg Mine Field, Sweden.. I: Proc. 12th EuCheMS International Conference on Chemistry and the Environment, June 14-17, Stockholm. Konferensbidrag vid 12th EuCheMS International Conference on Chemistry and the Environment, June 14-17, Stockholm (ss. 197-.

Karlsson, S. , Sartz, L. , Bäckström, M. & Allard, B. (2009). Abatement of ARD with solid alkaline waste materials: A meso-scale field test with emphasis on general hydrochemical parameters. I: Securing the Future and 8th ICARD. Konferensbidrag vid Securing the Future and 8th ICARD, June 22-26, 2009, Skellefteå, Sweden (ss. 10 pages-.

Sartz, L. , Bäckström, M. , Karlsson, S. & Allard, B. (2009). From bench to field: A stepwise method towards full scale remediation of historic mine sites. I: 8th International Conference on Acid Rock Drainage (ICARD) and Securing the Future Mining, Metals & the Environment in a Sustainable Society 2009. Konferensbidrag vid Securing the Future and 8th ICARD, 23-26 June 2009, Skellefteå, Sweden (ss. 1207-1216).

Sartz, L. , Bäckström, M. , Karlsson, S. & Allard, B. (2009). Stabilisation of acid-generating waste rock with alkaline by-products: Results from a meso-scale experiment. I: Securing the Future and 8th ICARD. Konferensbidrag vid Securing the Future and 8th ICARD, June 22-26, 2009, Skellefteå, Sweden (ss. 10 pages-.

Bäckström, M. , Karlsson, S. , Ekholm, D. , Evenhamre, P. & Skogsjö, E. (2009). Sediment quality before, during and after remediation of historical mine waste at Bersbo, Sweden. I: Securing the Future and 8th ICARD. Konferensbidrag vid Securing the Future and 8th ICARD, June 22-26, 2009, Skellefteå, Sweden (ss. 11 pages-.

Sartz, L. & Bäckström, M. (2008). The behaviour of barium, strontium, aluminium, chromium and molybdenum when leaching fly ash with acid rock drainage. I: ICAM 2008 Ninth international congress for applied mineralogy. Konferensbidrag vid 9th International Congress for Applied Mineralogy, ICAM 2008; Brisbane, QLD; 8 September 2008 through 10 September 2008 (ss. 357-364).

Bäckström, M. & Sädbom, S. (2008). Risk assessment of historical mine waste using chemical analysis and ocular mineral/rock classification: a comparison. I: ICAM 2008 9th International Congress for Applied Mineralogy. Konferensbidrag vid 9th International Conference of Applied Mineralogy 2008 (ss. 85-90).

Sartz, L. & Bäckström, M. (2007). Reclamation of historical mine waste using alkaline by-products. I: Northern Latitudes Mining Reclamation Workshop, Juneau, Alaska, USA, 15-17 May, 2007. Konferensbidrag vid Northern Latitudes Mining Reclamation Workshop, Juneau, Alaska, USA, 15-17 May, 2007 (ss. 10 pages-.

Karlsson, S. , Allard, B. & Bäckström, M. (2005). Changes in hydrochemistry some 15 years after covering of sulphidic mine waste, Bersbo, Sweden. I: Securing the future international conference on mining and the environment, metals and energy recovery : proceedings. Konferensbidrag vid Securing the future : international conference on mining and the environment, metals and energy recovery, June 27-July 1, 2005, Skellefteå, Sweden (ss. 509-518).

Karlsson, S. & Bäckström, M. (2003). Surface water quality in Bersbo, Sweden: fifteen years after amelioration of sulphidic waste. Konferensbidrag vid Mining and the Environment III. Sudbury, Canada:

Bäckström, M. , Karlsson, S. & Lifvergren, T. (2001). Estimation of molecular weight distributions of humic substances in sediment pore waters: PLS modelling of field data. I: 8th Nordic IHSS symposium on humic substances characterisation, dynamics, transport and effects. Konferensbidrag vid 8th Nordic IHSS symposium on humic substances – characterisation, dynamics, transport and effects (ss. 17-21). Copenhagen: Royal Veterinary and Agricultural University.

Lind, B. , Bäckström, M. & Geisler, E. (2001). First flush effect of metals and anions in stormwater runoff from roads in mid-Sweden. I: L.J. Sucharov, C.A. Brebbia, Urban transport VII urban transport and the environment for the 21st century. Konferensbidrag vid International Conference on Urban Transport and the Environment for the 21st Century (7 : 2001 : Lemnos) (ss. 497-508). Southampton: WIT Press.

Bäckström, M. , Karlsson, S. & Allard, B. (2000). Mobilisation of lead: field measurements at a trap range compared to solubility experiments. Konferensbidrag vid 11th Annual International Conference on Heavy Metals in the Environment, Ann Arbor, Michigan.

Manuskript

Sartz, L. , Bäckström, M. , Karlsson, S. & Allard, B. Leaching of lime kiln dust and LD-slag with ARD in a sequential batch experiment

Sartz, L. , Bäckström, M. , Karlsson, S. & Allard, B. Mixing of acid rock drainage with alkaline ash leachates : formation of solid precipitates and pH-buffering

Uppdaterad: 2015-02-04

Sidansvarig: Mattias Bäckström