城市园林对大气颗粒物的消减与大气中二氧化硫和氮氧化物的浓度变化

发布时间：2018-01-21 00:42

  本文关键词： 城市园林 大气污染 大气颗粒物 二氧化硫 氮氧化物　出处：《西北林学院学报》2016年06期 　论文类型：期刊论文

【摘要】：研究了昆明市城市园林对大气颗粒物的消减量和大气中二氧化硫和氮氧化物浓度的年内动态变化及其两者之间相关性。结果表明,昆明市大气中二氧化硫和氮氧化物的浓度随季节有明显的变化,氮氧化物、二氧化硫的含量变化范围分别为0.149~0.175mg·m-3与0.226~0.252mg·m-3,含量高低顺序均为:春季冬季秋季夏季。植被对大气颗粒物的消减量的高低顺序为:春季冬季秋季夏季,与二氧化硫和氮氧化物浓度变化一致。大气颗粒物对有毒有害气体具有一定的吸附性,植被对大气颗粒物的消减量与二氧化硫和氮氧化物的浓度具有负相关性,其中二氧化硫和氮氧化物的浓度与PM10极显著负相关,通过3次曲线模型对两者之间的关系进行拟合表明,植被对大气颗粒物的滞留作用间接减少了大气中二氧化硫和氮氧化物的含量,可为地方和区域环境监测评价提供参考。
[Abstract]:The dynamic changes of atmospheric particulate matter and the concentration of sulfur dioxide and nitrogen oxide in the atmosphere and the correlation between them were studied. The concentration of sulfur dioxide and nitrogen oxide in the atmosphere of Kunming city changed obviously with the seasons. The ranges of sulfur dioxide content were 0.149 ~ 0.175 mg 路m ~ (-3) and 0.226 ~ 0.252 mg 路m ~ (-3), respectively. The order of content is spring, winter, autumn and summer, and the order of the reduction of atmospheric particulate matter by vegetation is spring, winter, autumn and summer. It is consistent with the change of sulfur dioxide and nitrogen oxide concentrations. Atmospheric particulates have a certain degree of absorption to toxic and harmful gases, and the reduction of atmospheric particulates by vegetation has a negative correlation with the concentration of sulfur dioxide and nitrogen oxides. The concentration of sulfur dioxide and nitrogen oxide was negatively correlated with PM10, and the relationship between them was fitted by cubic curve model. The retention effect of vegetation on atmospheric particulates can indirectly reduce the contents of sulfur dioxide and nitrogen oxides in the atmosphere and can be used as a reference for local and regional environmental monitoring and evaluation.
【作者单位】： 西南林业大学环境科学与工程学院;
【基金】：国家林业局林业公益性行业科研专项(201204101-10) 云南省高校优势特色重点学科(生态学)建设项目(05000511311) 西南林业大学科技创新基金(C15116)
【分类号】：X513;X173
【正文快照】： 随着工业的快速发展和城市建设的扩大,工业废弃物、建筑扬尘和汽车尾气排放量急剧上升,城市大气污染是当前人类面临的日益严重和亟待解决的环境危机之一。大气中的二氧化硫和氮氧化物与粉尘共存,可生成毒性更大的硝酸或硝酸盐气溶胶,形成酸雨[1-2]。一般按颗粒污染物的空气动，

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