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- Title
北京西山国家森林公园空气负离子与大气污染物关系研究.
- Authors
李少宁; 李嫒; 赵旭; 鲁绍伟; 赵娜; 徐晓天; 徐兰
- Abstract
[Objective] The variation characteristics of air negative ions (NAI) and atmospheric pollutant concentration as well as their correlation were analyzed to study their influencing factors, and verify the atmospheric purification function of air negative ions in urban forests.[Method] On the basis of NAI and air pollutants concentration data monitored for a long time by Beijing Xishan National Forest Park, Origin software was used to draw the daily variation characteristic chart and SPSS software respectively to analyze the correlation between them. Then, the correlation between NAI and different air pollutant levels was analyzed according to Environmental Air Quality Standard (GB3095—2012). [Result] Urban forest NAI concentration was negatively correlated with PM2.5,NO2 and O3, NAI concentration was mainly affected by NO2. Regardless of the level of PM2.5 concentration, NAI could make feedback to the change of PM2.5 concentration sensitively. NAI had certain bearing capacity for NO2, when concentration of NO2 was lower than 40 μg/m³, NAI concentration ranges between 2000 and 2800 ion/cm3.When O3 concentration was lower than 50 μg/m³, NAI concentration was positively correlated with O3; When O3 concentration was greater than 50 μg/m³, NAI concentration was negatively correlated with O3. [Conclusion] The concentration of atmospheric pollutants at monitoring points is generally low, indicating that the degree of air pollution in urban forests is low, and the NAI released in forests can make feedback to the increased concentration of pollutants sensitively, further verifying that urban forests have certain resistance to the impact of urbanization.
- Subjects
AIR quality standards; ENVIRONMENTAL quality; AIR purification; URBAN pollution; ANIONS; AIR pollutants; URBAN forestry
- Publication
Southwest China Journal of Agricultural Sciences, 2021, Vol 34, Issue 10, p2269
- ISSN
1001-4829
- Publication type
Article
- DOI
10.16213/j.cnki.scjas.2021.10.027