Estimation of Non-exhaust (tire and break wear) PM Emissions from Road Traffic in Seoul Metropolitan Area

초록

Particulate matter (PM) generated in an automobile can be classified into an exhaust (or tailpipe) PM by fuel combustion and non-exhaust PM generated during driving of vehicle. Exhaust PM emissions from vehicles have been significantly reduced due to recent strengthening of regulations and improvement of control technologies. On the other hand, non-exhaust PM emissions such as tire wear and break wear particles were relatively inadequate in scientific knowledge and control measures. Recent studies indicate that non-exhaust PM emissions from road traffic are also an important source of air pollution in major cities (Grigoratos and Martini, 2014; Thorpe, 2008). The tire wear particles arise from frictional contact between the road surface and the vehicle tire tread and the brake wear particles are generated by wear of the brake lining material and the brake disk/drum due to frictional contact between the brake system components during braking. The aim of this study is to establish a methodology of non-exhaust PM emissions from road traffic to improve Korea air pollutant emission inventory data (Clean Air Policy Support System, CAPSS). To this end, we reviewed and compared the wear particle emission characteristics (wear factor, PM fraction, emission factor, etc.) of domestic/overseas research data and emission inventory. And then we estimated the tire wear and brake wear PM emissions in Seoul Metropolitan areas by applying the Europe EMEP/EA emission inventory methodology (EMEP/EEA, 2013). Acknowledgments: This study was funded by the Korea Ministry of Environment (MOE) and Inha University