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.
목차
Abstract I. 서론 II. 재료 및 방법 1. 시료 2. SEM/EDX 분석 3. Particle size 및 distribution 분석 III. 결론 및 고찰 1. 먼지 입자의 형성과 화학적 조성 2. 먼지 입자의 평균 크기 및 분포 분석 3. 먼지 입자의 수집 장소의 영향 IV. 결론 V. 사사 VI. 참고문헌
키워드
dustSEM (Scanning Electron Microscope)lightweight metal elementsaverage particle sizeparticle size distribution
저자
정석환 [ Seok-hoan Jeong | 국립과학수사연구원 법화학과 ]
김지원 [ Ji-won Kim | 국립과학수사연구원 법화학과 ]
한영웅 [ Young-woong Han | 국립과학수사연구원 법화학과 ]
조영훈 [ Young-hoon Jo | 국립과학수사연구원 법화학과 ]
민지숙 [ Ji-sook Min | 국립과학수사연구원 법화학과 ]
Corresponding author
법과학 분야는 사회정의 구현에 있어 크나큰 가치가 있음에도 불구하고 우리나라에서는 이 분야에 대한 인식이 미흡하여 선진 외국에 비해 침체되어 있는 실정이다. 이에 우리나라에서도 법과학 분야와 관련 있는 학계, 연구기관, 수사기관 등 유관 단체들로 구성된 한국 법과학회를 창립하여 이 분야를 활성화 시켜 과학수사를 한층 더 발전시키기 위함을 목적으로 한다.