竹群落空气负离子及空气质量评价

Bamboo Community Aero-anion and Air Quality Evaluation

于2010年12月—2011年11月,对散生竹、丛生竹、地被竹等3种竹群落的空气负离子浓度、可吸入颗粒物浓度进行监测,采用单极系数(q)、空气质量评价指数(CI)和森林空气离子评价指数(FCI)对空气质量进行评价,并探讨竹群落空气负离子浓度与温度、湿度的相关关系。结果表明:竹群落空气负离子浓度具有明显的日变化特征:波谷和波峰交替出现的单峰曲线,在8∶00—18∶00时段内,负离子浓度在8∶00处于最高水平,而在12∶00处于最低水平;空气负离子浓度随季节变化呈现出一定的规律性:春季很低,到夏季上升很快,而到秋季则又下降。竹群落可吸入颗粒物浓度的日变化:从8∶00开始可吸入颗粒物浓度开始缓慢下降,到16∶00达到最低,之后又缓慢上升;随季节变化则为冬季>秋季>春季>夏季。空气负离子浓度均值为丛生竹>散生竹>地被竹。空气负离子浓度总体水平均超过700个·cm-3,有益于人体健康,具有保健功能;空气质量评价系数CI均值为0.892,空气质量等级总体达到A级水平,即清洁程度。空气负离子浓度与气温、相对湿度呈二次曲线相关关系。

During December, 2010~November,2011,this paper monitored the aero-anion concentration and inhalable particle con-centration of scattered born bamboo , bushes bamboo and cover bamboo by aero-anion measuring instrument .It also discussed the re-lationship between aero-anion concentration and temperature and humidity .The research results showed that the aero-anion concen-tration had evident daily changes characteristics with the changes of time .There was a single-peak curve with peaks and troughs ap-peared alternately , during 8∶00~18∶00, the aero-anion concentration was highest at 8∶00 am and was lowest at 12∶00 am.The aer-o-anion concentration showed a certain regularity that it was very low in spring ,increased quickly in Summer , and decreased in Au-tumn.The bamboo community inhalable particle concentration daily change was that the inhalable particle concentration began de -creasing at 8∶00 am slowly, and the minimum appeared at 16∶00 am and then increased slowly .The seasons change was winter >au-tumn>spring>summer.Air negative ions concentration overall levels were more than 700 ones· cm-3 , beneficial to human body health, had the health functions; the air quality evaluation coefficient CI mean value was 0.892, The levels of them respectively were A level ( clear degree ) .Aero-anion concentration , temperature and relative humidity appeared a quadratic curve .