Report - DCE - Nationalt Center for Miljø og Energi

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The heavy metal emission estimates for road transport are based on a national
research study made by Winther and Slentø (2010). The latter study
calculate the exhaust related emissions from fuel and engine oil as well as
the wear related emissions from tyre, brake and road wear. Apart from Pb,
the emission factors only deviate to a less extent due to changes in fleet and
mileage composition over the years, which bring relative changes in fuel
consumption per fuel type, engine oil use and aggregated emission factors
for brake, tyre and road wear.
The most important exhaust related emissions for road transport are Cd, Cr,
Hg and Zn. the most important wear related emissions are Cu and Pb almost
solely coming from tyre wear, and Zn from brake and tyre wear. For other
mobile sources, the most important emission contributions are calculated for
Ni, Se and As, coming from the use of marine diesel oil in fisheries and
navigation and residual oil in navigation.
The Figures 3.76 and 3.77 show the heavy metal emission distributions for
all road transport sources split into vehicle categories, and for other mobile
sectors, respectively.
For non road mobile machinery in agriculture, forestry, industry, commercial/institutional
and recreational, as well as military and railways, fuel related
emission factors from road transport are used derived for the year
2009.
For civil aviation jet fuel no emissions are estimated due to lack of emission
data, whereas for aviation gasoline fuel related emission factors for road
transport gasoline is used derived for the year 2009, except for Pb where national
data exist.
For navigation and fisheries, the heavy metal emission factors are fuel related,
and are taken from the EMEP/EEA guidebook.