http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Tomo Oikawa ) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
( Noboru Tanikawa ),( Tomo Oikawa ),( Kazuei Ishii ),( Tohni Furuichi ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.2
메탄, 이산화탄소, 아산화질소는 매립가스의 주성분으로 잘 알려져 있다. 대기의 메탄, 이산화탄소, 아산화질소를 연속적으로 측정하였고, 매립가스의 배출량을 측정하기 위한 간단한 방법을 평가하기 위해 매립지 부근에서의 풍향과 풍속 또한 연속적으로 측정하였다. 매립지로부터 측정지점으로 풍속 2-3 m/s 이상으로 불 때, 대기 중 이산화탄소 농도는 380- 480ppm, 아산화질소는 0.30-0.33ppm 로, 이러한 도시지역의 배경농도와 유사한 값으로 조사되었다. 반면, 메탄농도는 풍향과 풍속에 영향을 받는 것으로 나타났다. 매립지로부터 바람이 불 때, 메탄농도는 항상 2ppm 보다 높았고, 그 값은 도시배경농도가 된다고 판단되었다. 매립지로부터 배출되는 가스가 이런 식으로 메탄농도를 증가시키는 것으로 여겨진다. 메탄농도의 증가가 0에 근접하게 되면, 매립가스의 배출은 대부분 중지되었다고 판단할 수 있다. 매립지 부근의 대기중 메탄농도의 연속적인 측정은 매립가스의 배출을 모니터링하기 위한 간단하고 효과적인 방법이다. 따라서, 대기중 메탄농도는 매립지의 안정화 정도를 평가하는 지표로서 이용될 수 있을 것이다. Methane (CH<sub>4</sub>), carbon dioxide (CO<sub>2</sub>), and nitrous oxide (N<sub>2</sub>O) are well known as being the main landfill gases. We used continuous analyzers to measure CH<sub>4</sub>, CO<sub>2</sub> and N<sub>2</sub>O in ambient air and also the direction and velocity of the wind at a point near the landfill site to evaluate a simple method of measuring the emission of landfill gases. When there was a wind velocity over 2-3 m/s blowing from the landfill site to the measurement point, the atmospheric levels of CO<sub>2</sub> ranged from about 380 to 480 ppm, and the N<sub>2</sub>O concentrations ranged from about 0.30 to 0.33 ppm, similar to background levels in this urban area. However, the CH<sub>4</sub> concentrations were dependent on the direction and the velocity of the wind. When there was a wind blowing in from the landfill site, CH<sub>4</sub> concentrations were always higher than about 2 ppm, the value considered to be the urban background concentration. It was supposed that gas emitted from the landfill site caused this increase of CH<sub>4</sub> concentration. If the CH<sub>4</sub> concentration increase was approximately equal to zero, we could judge that the landfill gas emission had almost ceased. The continuous measurement of CH<sub>4</sub> in ambient air near a landfill site is clearly a simple and effective method for monitoring landfill gas emissions and the CH<sub>4</sub> concentration in ambient air may be usable as an index of the degree of stabilization of the landfill site.
-
MONITORING OF METHANE IN AMBIENT AIR AS AN INDEX OF STABILIZATION AT LANDFILL SITES
( Noboru Tanikawa ),( Tomo Oikawa ),( Kazuei Ishii ),( Tohru Furuichi ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.1
Methane (CH<sub>4</sub>), carbon dioxide (CO<sub>2</sub>), and nitrous oxide (N<sub>2</sub>O) are well known as being the main landfill gases. We used continuous analyzers to measure CH<sub>4</sub>, CO<sub>2</sub> and N<sub>2</sub>O in ambient air and also the direction and velocity of the wind at a point near the landfill site to evaluate a simple method of measuring the emission of landfill gases. When there was a wind velocity over 2-3 m/s blowing from the landfill site to the measurement point, the atmospheric levels of CO<sub>2</sub> ranged from about 380 to 480 ppm, and the N<sub>2</sub>O concentrations ranged from about 0.30 to 0.33 ppm, similar to background levels m this urban area. However, the CH<sub>4</sub> concentrations were dependent on the direction and the velocity of the wind. When there was a wind blowing in from the landfill site, CH<sub>4</sub> concentrations were always higher than about 2 ppm, the value considered to be the urban background concentration. It was supposed that gas emitted from the landfill site caused this increase of CH<sub>4</sub> concentration. If the CH<sub>4</sub> concentration increase was approximately equal to zero, we could judge that the landfill gas emission had almost ceased. The continuous measurement of CH<sub>4</sub> in ambient air near a landfill site is clearly a simple and effective method for monitoring landfill gas emissions and the CH<sub>4</sub> concentration in ambient air may be usable as an index of the degree of stabilization of the landfill site.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
