Research highlights ► Using Hungarian data, the paper shows that traffic dynamics strongly influence emissions and road runoff loads of Cu and Zn. ► The paper identifies the characteristic Cu/Zn ratios for urban and motorway runoff. ► A quarter of emitted brake wear material becomes entrained by rainfall–runoff.
Abstract This paper estimates the traffic-related heavy metal emissions and rainfall–runoff loads in Hungary for 2008 using the results of two rainfall–runoff sampling programs. Based on the metal concentrations found in runoff samples, distinct Cu/Zn ratios are identified for urban and motorway traffic. The former being higher than the latter reflects the effect of more frequent brake application. Runoff Cu/Zn values from field samples are compared to those from various estimation scenarios to evaluate the latter and it is found that, as a rule-of-thumb, about 25% of the emitted brake wear material becomes entrained by rainfall–runoff. Based on the comparison of Pb/Cu ratios derived from the load estimation and the road runoff samples, the Pb emissions appear to be underestimated by an order of magnitude.
Refinement of national-scale heavy metal load estimations in road runoff based on field measurements
Transportation Research Part D: Transport and Environment ; 16 , 3 ; 244-250
2010-01-01
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Refinement of national-scale heavy metal load estimations in road runoff based on field measurements
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