大氣顆粒物和氣態污染物的降雨清除效率及影響因素

鄒長偉, 黃虹, 楊帆, 劉星, 曾寶強, 朱方旭, 劉毅

Research output: Contribution to journalArticle

Abstract

降雨是大氣污染物最重要的匯大氣污染物影響雨水化學組成,定量化大氣污染物的降雨清除效率能為大氣污染的準確模擬和污染控制的人工干預提供重要科學依據。2014年9月29日-2015年1月12日,採樣監測南昌地區降雨前後大氣污染物,分析降雨狀況,計算和比較降雨對不同大氣污染物的清除效率,討論不同因素對清除過程的影響,結果顯示,降雨對大氣污染物有清除作用,對不同污染物的清除效果不同大氣顆粒物的清除效率高於氣態污染物的原因是作用機制的不同3種氣態污染物清除效率的區別是因為水溶性的差異;多天連續降雨使大氣污染物的降雨清除效率呈下降趨勢;降雨量與大氣污染物的降雨清除效率呈正相關;降雨強度越大大氣污染物的降雨清除效率越高;大氣壓因影響降雨量,而間接影響大氣污染物的降雨清除效率相對濕度71.1%~93%範圍內,相對濕度越大大氣污染物的降雨清除效率越大。
Rainfall is one of most important sink of atmospheric pollutants.Air pollutants affect water chemical composition. It is very significant to quantify atmospheric pollutants removal efficiency by rainfall accurately, which could offer basis data to the simulation of atmospheric pollution and the intervention and removement of atmosphereic pollution by man scientifically.Several air pollutants (TSP, SO₂, NO₂, NH₃) before and after raining in Nanchang were sampled and determined from September 29, 2014 to January 12, 2015. At the same time, rain was collected and weather factors were recorded. Atmospheric pollutants removal efficiency by rainfall were calculated and compared. Affection fators on removal efficiency of pollutants were discussed. Results showed that certain degree atmospheric pollutants were removed by rainfall. But removal efficenecies of different pollutants were different. Removal efficiency of particulate was higher than that of gaseous pollutants because of different effects mechanism on the pollutants by rainfall. The sorting of removal efficiency of gaseous pollutants by rainfall depends on the sorting of their solubility in water. Continuous days of rain make removal efficiency of air pollutants declining. Rainfall capacity and removal efficiency of pollutants by rainfall were positively correlated. The greater the rainfall intensity, the higher the atmospheric pollutants removal efficiency of rainfall was. Atmospheric pressure affects removal efficiency of pollutants by rainfall indirectly by affecting rainfall capacity directly. During certain relative humidity range from 71.1% to 93%, the greater the relative humidity, the higher removal efficiency of pollutants was. Copyright © 2017 湖北省環境科學研究院.
Original languageChinese
Pages (from-to)133-140
Journal環境科學與技術
Volume2017
Issue number1
Publication statusPublished - 2017

Citation

鄒長偉、黃虹、楊帆、劉星、曾寶強、朱方旭和劉毅(2017):大氣顆粒物和氣態污染物的降雨清除效率及影響因素,《環境科學與技術》,2017(1),頁133-140。

Keywords

  • 大氣污染物
  • TSP
  • SO₂
  • NO₂
  • NH₃
  • 降雨
  • 清除
  • Air pollutant
  • Rainfall
  • Removal efficency
  • Alt. title: Atmospheric particulate and gaseous pollutants removal efficiency by rainfall and the influencing factors