도시지역 도로먼지의 중금속 오염 특성: 토지이용 특성에 따른 비교

Abstract

In this study, heavy metals in road dust from 5 different land use types in urban areas were investigated to understand the characteristics and status of metal pollution. Urban roads in mixed commercial/industrial areas (MCIA) showed the highest concentration of heavy metals compared to other areas. According to the pollution load index calculation, the MCIA area was approximately 6 times more polluted than that from the residential area (RA) and traffic area (TA), in the order of MCIA>CA (commercial area)>TA>PA (parking area)>RA. The road dust from most urban areas showed significant levels of pollution in Cu, Zn, Pb, Cd, resulting in contamination by traffic related vehicles such as abrasion of tire and brake wear. However, the MCIA road dust appeared to be extremely high pollution because of the use of metals associated with industrial activity in the area. Our results showed that 270 mg of 8 heavy metals is accumulated per unit area (m2) in the road dust. The road dust contaminated with heavy metals can be dispersed and inhaled by residents of urban areas. It can also be introduced into the surrounding aquatic and coastal environments through drainage systems during rainfall and cause heavy metal pollution in these environments. Additional research on human and environmental impacts is necessary.