The following study aims to estimate the configuration ratio of the ion compounds that identifies the cause of fine dust and ways to reduce it. In this study, the physical and chemical properties of fine particles in a tunnel and the configuration form of ionic composition were interpreted to establish reasonable measurement for air quality management. Seasonal measurements were performed by collecting samples from the Mia sageori subway station. Chemical Mass Balance (CMB) model was used to estimate the configuration ratio of ions in this study. The results showed that the test performed outside showed about 56.4% of total ion, with (NH4)2SO4, NH4NO3, CaCO3 and NaCl showing concentrations of 2.138 μg/m3, 1.957 μg/m3, 1.697 μg/m3 and 1.600 μg/m3, respectively, while the results indoor had CaCO3, NH4NO3, (NH4)2SO4 and NaCl showing concentrations of 2.272 μg/m3, 2.204 μg/m3, 1.656 μg/m3 and 1.342 μg/m3, respectively, about 65.1% of total ion. During the usage of tunnel, it was found that CaCO3, NH4NO3, (NH4)2SO4 and MgCO3 showed concentrations of 3.464 μg/m3, 1.732 μg/m3, 1.698 μg/m3 and 0.582 μg/m3, respectively, total ion of 70.2% was presented.

1. 서 론
 2. 연구방법
  2.1 측정방법
  2.2 중량분석
  2.3 이온분석
  2.4 당량비를 이용한 탄산염 추정
  2.5 CMB 모델링
  2.6 CMB 모델링의 안정성 평가
  2.7 CMB 모델링 source profile 작성
 3. 결과 및 고찰
  3.1 기상자료 및 중량분석 결과
  3.2 이온분석 특성
  3.3 이온성분의 결합형태 분석
 4. 결 론
 References

• 이용일(한국철도기술연구원 교통환경연구팀, 성균관대학교 기계공학과) | Yongil Lee
• 이경빈(서울시립대학교 환경공학과) | Kyoung Bin Lee
• 김진식(서울시립대학교 환경공학과) | Jin Sik Kim
• 박덕신(한국철도기술연구원 교통환경연구팀) | Duckshin Park
• 김신도(서울시립대학교 환경공학과) | Shin Do Kim Corresponding author