표제지
국문요약
목차
제1장 서론 12
1.1. 연구 배경 및 목적 12
1.2. 연구내용 14
제2장 이론적 배경 16
2.1. 미세기포 정의 및 특징 16
2.2. 미세기포의 생성 및 측정법 19
2.2.1. 미세기포 생성방법 19
2.2.2. 미세기포 측정방법 20
2.3. 도로 미세먼지 특성 21
2.3.1. 국내 미세먼지 배출량 21
2.3.2. 도로퇴적물 특성 24
2.4. 선행연구분석 26
2.4.1. 하수종말처리장 26
2.4.2. 반도체 세정 27
2.4.3. 토양정화 27
제3장 실험장치 및 방법 28
3.1. 미세기포의 운전조건 최적화 28
3.1.1. 실험장치 및 방법 28
3.1.2. 미세기포의 종말상승속도 30
3.1.3. 반응모델 및 통계분석 31
3.2. 미세기포를 이용한 공용 도로 시설물 미세먼지 제거효율 평가 33
3.2.1. 실험 장소 및 조건 33
3.2.2. 미세기포 생성 및 세척 장치 34
3.2.3. 미세기포 측정 방법 38
3.2.4. 표면 분진 샘플링 38
3.2.5. 표면 분진 분석 39
제4장 결과 및 고찰 42
4.1. 미세기포의 운전조건 최적화 42
4.1.1. 예측모델 수립 및 검증 42
4.1.2. 수정된 최적화 모델식 수립 및 등고선도 48
4.1.3. 최적조건 수립 51
4.1.4. 기포 크기 측정 52
4.2. 미세기포를 이용한 공용 도로 시설물 미세먼지 제거효율 평가 55
4.2.1. 미세기포 측정 결과 55
4.2.2. 미세먼지(PM10) 측정 결과 56
4.2.3. 표면 분진 측정 결과 57
제5장 결론 62
제6장 참고문헌 64
ABSTRACT 71
Table 2-1. Size characteristics of bubbles 16
Table 2-2. Microbubble generation method 19
Table 2-3. Air pollutant emission by source categories of CAPSS(2019) 22
Table 2-4. Types and sources of non-point pollutants on roads 24
Table 2-5. Amount of contaminants per area according to distance 25
Table 2-6. Distribution of Pollutants by Particle Size 25
Table 3-1. The main part and specifications of Microbubble genearator 29
Table 3-2. Optimal conditions for generating Ultra Fine Bubble 31
Table 3-3. schematic diagram of roadway structure surface dust washing vehicle 37
Table 3-4. Classification by dust size (Class B) 40
Table 4-1. The results of terminal rise velocity by operation conditions of microbubble genearator 43
Table 4-2. Estimated regression coefficients and corresponding t and P values for Eq.(1) 46
Table 4-3. ANOVA results for response parameters 47
Table 4-4. Optimization conditions for response Y(Terminal rise velocity) 51
Table 4-5. Comparison of dust distribution adsorbed on tile and concrete surfaces before and after cleaning 61
Fig. 1-1. Road structure contaminant cleaning status 13
Fig. 1-2. Method and composition of microbubbles 14
Fig. 2-1. Mechanisms for the Stability of Microbubbles. 17
Fig. 2-2. Principle of Pollutant Adsorption of Ultra-fine bubble. 18
Fig. 2-3. Principle of ultra-fine bubble cleaning. 18
Fig. 2-4. The method of generating ultra-fine bubble size among microbubble. 19
Fig. 2-5. Measurement method for the diameter of microbubble. 20
Fig. 2-6. Laser diffraction/scattering method. 20
Fig. 2-7. PM10 emission distribution by source categories(국립환경과학원, CAPSS). 23
Fig. 2-8. PM2.5 emission distribution by source categories(국립환경과학원, CAPSS). 23
Fig. 3-1. Picture of a microbubble generator experimental apparatus. 29
Fig. 3-2. (a) rise velocity measurement of Ultra Fine Bubble (a) Before Ultra Fine Bubble generation (b) Stop device after Ultra Fine Bubble... 29
Fig. 3-3. (a) the wall of an underground road, (b) a concrete surface, (c) Concrete surface cleaning. 33
Fig. 3-4. Schematic diagram of the ultrafine bubble generator. 35
Fig. 3-5. Schematic diagram of roadway structure washing vehicle. 36
Fig. 3-6. Pictorial references corresponding to dust quantity rating (Class A). 39
Fig. 3-7. Flowchart of developed plug-in to analyze number of particles. 40
Fig. 4-1. Comparison between predicted and observed TRV (R²=93.3%, Adjusted R²=92.3%, Predict R²=90.4%). 45
Fig. 4-2. 2D Contour plot of response Y (Terminal rise velocity, cm/min) showing interaction (a) between Pressure (bar)(X1) and Airflow... 49
Fig. 4-3. Microbubbles size measurement using Laser Trac particle counter. 52
Fig. 4-4. Indirect Nanobubble measurement using Laser point. 53
Fig. 4-5. Dissolved oxygen measurement (a) DO meter in water tank (b) DO in injection with Air (b) DO in... 54
Fig. 4-6. Distribution of ultrafine bubble concentrations and size in water. 55
Fig. 4-7. Results of realtime PM10 and temperature by PM10 measurement. 56
Fig. 4-8. The tile wall surface (a, b) and dust particle collection sampling tapes (c, d) before and after the ultrafine bubble... 59
Fig. 4-9. The concrete pad surface (a, b) and dust particle collection sampling tapes (c, d) before and after the ultrafine bubble... 60