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Driftåtgärder mot PM10 i Stockholm: utvärdering av vintersäsongen 2013–2014
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.ORCID iD: 0000-0001-6600-3122
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.ORCID iD: 0000-0002-0124-04802
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.ORCID iD: 0000-0002-2679-2611
SLB-analys.
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2015 (Swedish)Report (Other academic)Alternative title
Operational measures against PM10 pollution in Stockholm : evaluation of winter season 2013–2014 (English)
Abstract [sv]

Sedan 2011 pågår ett intensifierat arbete för att sänka halterna av PM10 i Stockholm, där problemen är omfattande. Denna rapport presenterar resultat och utvärdering av insatserna gjorda under vintersäsongen 2013–2014. De lägsta PM10-halterna sedan mätningarna startade i Stockholm, uppmättes under säsongen och miljökvalitetsnormen klaras med bred marginal, vilket åtminstone delvis kan bedömas vara en effekt av de intensifierade åtgärderna. Vintern var dock ovanligt mild och snöfattig och har sannolikt bidragit till att de vanligtvis stora dammängder som ansamlas på vägytan i snö och fukt under vintern kunnat lämna systemet genom suspension, städning och avrinning utan att resultera i höga partikelhalter. Under de torra perioderna har dessutom frekvent dammbindning dämpat halterna. Den vanligtvis kraftiga PM10-toppen på våren har därför i stort sett uteblivit. Den kvartersvisa behandlingen visade sig ge ytterligare effekt på PM10-halterna, medan CMA (kalciummagnesiumacetat) + KF (kaliumformiat) inte kunde visas ha någon extra effekt. Mätningarna av vägdammsförrådet uppvisar samma säsongsvariationer som tidigare år, med stora mängder under vintern och mindre mängder under höst och sen vår. Alla gator, utom Hornsgatan, uppvisar en successiv sänkning av vägdammsmängderna under de tre säsonger som mätningar utförts. Andelen partiklar mindre än 10 μm i vägdammet stiger från höst till vinter och avtar igen under våren. Den organiska andelen varierar i genomsnitt mellan 10 och 20 viktprocent av DL180 (dust load mindre än 180 μm).och uppvisar också en säsongsvariation, där andelen är högre på hösten och som lägst tidig vår. I en specifik utvärdering av städmaskinens effekt på vägdammsförrådet kunde en minskning observeras.

Abstract [en]

Since 2011, intensified efforts are made to reduce levels of PM10 in Stockholm, where the problems are extensive. This report includes the results and evaluation of the measures taken during the winter season 2013–2014. The lowest PM10 levels since records began in Stockholm, were measured during the season and the limit values for the environmental quality standard is managed by a wide margin, which at least partially can be attributed to the intensified measures. The winter was unusually mild and snow-free and this has probably contributed to that, the typically large quantities of road dust that accumulates on the road surface in winter were able to leave the system through suspension, cleaning and drainage without high particulate levels resulting. During dry periods, frequent dust binding has helped to suppress high PM10 levels. The usually sharp PM10 peak in spring did not appear to the same extent as previous years. The block-wise CMA (calcium magnesium acetate) treatment was shown to provide additional reducing effect on PM10 levels, while the CMA + KF (potassium formate) treatment did not appear to have any impact. The measurements of the road dust load show the same seasonal fluctuations as in previous years, with large amounts during winter and early spring and lower in fall and late spring. All streets, except Hornsgatan, show a gradual decrease of road dust load over the three seasons with available data. The proportion of particles smaller than 10 microns in the dust increases from autumn to winter and decreases again in the spring. The organic proportion varies between 10 and 20 per cent by weight of DL180 (dust load less than 180 μm)and also exhibit a seasonal variation, where the proportion is higher in autumn and lowest in early spring. In a specific evaluation of the cleaning machine, a reduction of the road dust load could be observed.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2015. , 69 p.
Series
VTI rapport, ISSN 0347-6030 ; 847
Keyword [en]
Particulate matter, Dust, Dust removal, Cleaning, Method, Evaluation (assessment), Pollution concentration, Winter, Street
National Category
Other Engineering and Technologies not elsewhere specified
Research subject
10 Road: Transport, society, policy and planning, 15 Road: Environment
Identifiers
URN: urn:nbn:se:vti:diva-7799OAI: oai:DiVA.org:vti-7799DiVA: diva2:797945
Available from: 2015-03-25 Created: 2015-03-25 Last updated: 2017-12-15Bibliographically approved

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