earticle

영어

In this study, in an effort to distinguish the morphological characteristics and chemical composition of dust, samples were collected indoors (receiving room) and outdoors (roads, front yard, and backyard) using the 3M EVM-7 series for 24 h. Scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDS) analysis provided visual evidence of the dust in terms of the shape and chemical composition of the particles. The area fraction and size range were also measured using image analyzer software. The morphology, chemical composition, average size, and size distribution of the dust were analyzed. In the case of outdoor dust, the mean dust particle size was measured as 4.13 and 3.63 m in the road and front yard, respectively. These outdoor dusts in road and front yard had a mean size range from 2.55 to 4.13 ?m. The size distribution results showed that outdoor dust has a relatively larger particle size (>2 m) than indoor dust. In case of indoor dust, approximately 40 % of dust particles had sizes less than 2 ?m. Regarding morphology, indoor dust had a relatively simple shape. However, the outdoor dust was composed of various elements, and its form was complicated. The outdoor dust was composed of lightweight metal elements, such as aluminum, silicon, calcium, and magnesium, due to the seasonal effect of the spring. In addition, the road dust and, in the case of dust from the front yard adjacent to the road, the carbon and sulfur content originating from vehicle fuel were observed to be relatively high.