大气中PM_(2.5)的现状分析及新的思考

PM2.5是对空气中直径小于或等于2.5μm的固体颗粒或液滴的总称,又叫细颗粒物或入肺颗粒物。为解除目前我国大部分地区灰霾天气的困扰并探索其形成原因,文章主要综述了PM2.5的形成、危害及防治措施。通常用PM2.5来表示每立方米空气中这种颗粒的含量,该值越高,就代表空气污染越严重。PM2.5对人体危害极大,其大小与相应疾病的发病率,死亡率成正比。空气中的PM2.5的浓度可以通过重量法等进行测量。以微生物过滤为辅助,降低工厂,汽车的废气,尾气排放从而减少PM2.5的污染,也可以增加生活环境中净化空气的绿色植被,利用静电除尘的方法来改善空气质量。

Current Situation Analysis and New Thinking of PM2.5 in Air

PM2.5(particulate matter)is dust in the air with a diameter which is or is less than 2.5 μm.Lately many areas of our country were shrouded by fog.In order to find its reason and solve this problem,the source,harm and pollution preventions of PM2.5 are well described in this article.It is used to indicate the content of PM2.5 per cubic meter.The higher PM2.5 is,the worse pollution is.PM2.5 has great harm to human body.Its range is in proportion to the corresponding disease rate and the mortality rate.The density of PM2.5 can be determined by gravimetric method.Pollution by PM2.5 can be relieved by reducing off gas of factories and vehicles with the help of microbial filter.More green vegetations can be planted and electrostatic precipitation can be used to purify air.