EVALUATION ON THE EFFECTIVENESS OF STREET VACUUM CLEANER FOR REMOVING RESUSPENDED FINE PM FROM PAVED ROADS IN SEOUL METROPOLITAN AREAS

초록

Fugitive dust arising from the resuspension of deposited materials on paved roads by vehicle travel has been regarded an important contributor to ambient particulate matter(PM) in the large urban areas around the world (Amato et al., 2010; Han et al., 2011; Han and Jung, 2012). Recently, these cities have practiced the enhanced street cleaning program as a means of controlling PM10 emissions from paved roads. The effectiveness of street cleaning on ambient fine PM, however, has not been clearly investigated thus far. In the Seoul metropolitan areas, dry-type vacuum street cleaner with dust filter has been introduced and operated to reduce ambient PM10 concentration. The ultimately aim of our study is to evaluate the quantitative effectiveness of street cleaning program for reducing PM10 emissions from paved roads. In this study, in order to evaluate the removal effectiveness of road resuspended fine PM(PM10, PM2.5), two test methods were applied. In one method, silt loadings of test roads before and after street cleaning were measured by using the real-time silt loading measurement system, which has been developed for estimation of resuspended dust emissions from paved road by our research team(Han and Jung, 2012). In the other method, we measured the concentration and size distributions of fine PM at the suction inlet and outlet of vacuum cleaner using real-time dust monitor(Grimm #1.109) and evaluated the dust removal efficiency of the cleaning equipment in actual operation.