This study was carried out to develop a system to reduce ultrafine dust using hygroscopic materials such as glycerin and propylene glycol. Prior to the development of an ultrafine dust reduction system, the moisture condensation efficiency of glycerin and propylene glycol was investigated based on relative humidity (RH). The results showed that when no substances (glycerin and propylene glycol) were added to a tedlar bag, the relative humidity and temperature remained constant. The moisture condensation efficiency of glycerin was 60%, and the time it took to reach 50% of the initial relative humidity was about 40minutes. In the case of propylene glycol, the moisture condensation efficiency was 75%, and the time it took to reach 50% of the initial relative humidity was about 10 minutes. When glycerin and propylene glycol mixture was added, the moisture condensation efficiency was 68% and it took 20 minutes to reach 50% of the initial relative humidity. These results suggest that hygroscopic materials such as glycerin and propylene glycol can actually condense moisture in the atmosphere. In addition, considering actual atmospheric conditions, the relative humidity was set to 60% and 40% or less, and the moisture condensation efficiency was measured. The results showed that the mixture of glycerin and propylene glycol yielded the highest condensation efficiencies, at 69% and 62%, respectively. Therefore, it is preferable to use a mixture of glycerin and propylene glycol to condense moisture in the range of relative humidity in the actual atmosphere.

1. 서 론
2. 연구 방법
    2.1 흡습성 물질의 선정
    2.2 연구 방법
3. 결과 및 토의
    3.1 tedlar bag 안에서의 상대습도 변화
    3.2 흡습성 물질의 종류에 따른 흡습 효율 평가
    3.3 습도조건에 따른 제거효율
4. 결 론
감사의 글

• 김대현(부경대학교 지구환경시스템과학부 환경공학전공) | Dae-Hyeon Kim (Division of Earth Environmental System Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea)
• 호시모비 딜숏(부경대학교 지구환경시스템과학부 환경공학전공) | Dilshod Khoshimov (Division of Earth Environmental System Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea)
• 송동하(스마클㈜) | Dongha Song (Smarcle Co. Ltd., 17, 172 Bungil, Yulmalo, Daegoth-myeon, Kimpo-si, Gyeonggi-Do 10037, Republic of Korea)
• 박찬열(국립산림과학원 도시숲연구과) | Chan Ryul Park (Urban Forests Division, National Institute of Forest Science, 57 Hoegi-ro, Dongdaemun-gu, Seoul 02455, Republic of Korea)
• 손윤석(부경대학교 지구환경시스템과학부 환경공학전공) | Youn-Suk Son (Division of Earth Environmental System Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea) Corresponding Author