CAJ | 학술논문

为了得到衡阳市区大气颗粒物的污染水平及分布特征，本文根据衡阳城区特点及人员活动规律，以2013年8月25~27日和11月27~29日作为夏秋季代表日，在人员活动最为集中的交通主干道附近进行了定点实地测量，包括作为参照的南华大学共设6测点.结果表明，秋季PM2.5浓度明显高于夏季，数浓度前者为后者的2.27~3.13倍，质量浓度前者为后者的1.74~3.74倍.从整体特征而言，颗粒直径基本在5μm以下，其中PM2.5数量在PM10中占比达99.5左右，而PM1.0又约占到了PM2.5的97%；早8点和晚8点左右是人员户外活动高峰期，也是PM2.5浓度最高的时段，中午和午后水平较低，夏季PM2.5和PM10质量浓度均在国家二级标准限值以内，秋季部分区域超出限值，同时对各测点进行了颗粒物污染程度排序.本文还通过实验发现，洒水对降低PM2.5和PM10的浓度都是有效的，有效时段为洒水后第11至24小时.
위료득도형양시구대기과립물적오염수평급분포특정，본문근거형양성구특점급인원활동규률，이2013년8월25~27일화11월27~29일작위하추계대표일，재인원활동최위집중적교통주간도부근진행료정점실지측량，포괄작위삼조적남화대학공설6측점.결과표명，추계PM2.5농도명현고우하계，수농도전자위후자적2.27~3.13배，질량농도전자위후자적1.74~3.74배.종정체특정이언，과립직경기본재5μm이하，기중PM2.5수량재PM10중점비체99.5좌우，이PM1.0우약점도료PM2.5적97%；조8점화만8점좌우시인원호외활동고봉기，야시PM2.5농도최고적시단，중오화오후수평교저，하계PM2.5화PM10질량농도균재국가이급표준한치이내，추계부분구역초출한치，동시대각측점진행료과립물오염정도배서.본문환통과실험발현，쇄수대강저PM2.5화PM10적농도도시유효적，유효시단위쇄수후제11지24소시.
In order to understand the pollution level of atmospheric particulates and the characteristics of distribution in Hengyang,field measurements were carried out during Au-gust 25~27 and November 27~29 of 2013 . Five measuring points were selected along the side of the main road, and one point was at the University of South China. The result showed that the concentration of PM2. 5 was significantly higher in autumn than in summer. The numerical density of PM2. 5 in autumn was 2. 27~3. 13 times and the mass concentra-tion was 1. 74~3. 74 times higher in autumn than in summer. In general,the size of parti-cles was almost below 5 μm in diameter,and the dominant particles were less than 1 μm. The PM2. 5 concentration was highest at 8 am and 8 pm,but was lowest at noon and in the afternoon. Mass concentrations of PM2. 5 and PM10 were less than the national standard lim-its in Summer,but some areas beyond the limits in autumn. Then the six measuring points were ranked according to the degree of pollution. This study provides evidence that wate-ring can reduce PM2. 5 and PM10 concentration and the best result of particle reduction is between 11 to 24 hours after watering.