This study analyzes the effect of negative air ions on the concentration of airborne particulate matter and evaluates the expected purification efficiency of open spaces for particulate matter by investigating the amount of negative air ions generated by plants. This study establishes a negative air ion generation treatment environment, plant environment, and control environment to measure the purification efficiency of particulate matter under the conditions of each, analyzing the expected purification efficiency by designing a particulate matter purification model. Results show that the amount of generated negative air ion according to environment was negative air ion generation treatment environment > plant environment > control environment; this order also applies to the particulate matter purification efficiency. Moreover, it took 65 min for the negative ion generation treatment environment, 90 min for the plant environment, and 240 min for the control environment to reach the standard expected purification efficiency of particulate matter concentration of 960 mg/m³ for PM10. For PM2.5, with the designated maximum concentration of 700 mg/m³, it took 60 min for the negative ion generation treatment environment, 80 min for the plant environment, and more than 240 min for the control environment. Based on these results, the expected purification efficiency compared to the control environment was quadrupled in the negative ion generation treatment environment and tripled in the plant environment on average.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 공시재료 및 실험구 조성
    2.2. 조사・분석 방법
3. 결과 및 고찰
    3.1. 음이온 발생원 차이에 따른 실험구별 음이온 발생량
    3.2. 음이온의 미세먼지 정화 특성
    3.3. 음이온 발생량과 라돈의 관계
4. 결 론
REFERENCE

• 오득균(건국대학교 녹색환경시스템전공) | Deuk-Kyun Oh (Department of Green Environment System, Konkuk University) Corresponding author
• 주진희(건국대학교 녹색기술융합학과) | Jin-Hee Ju (Department of Green Technology Convergence, College of Science and Technology, Konkuk University)