大气气溶胶酸度和酸化缓冲能力研究

为了掌握大气气溶胶与酸性降水的关系 ,分析和研究了中国北方和南方不同观测点可吸入颗粒物 (PM10 )的酸度 ,并利用微量酸碱滴定的方法测定了其酸化缓冲能力。结果表明大气气溶胶具有一定的酸度 ,同时对酸化的缓冲能力非常低 ,甚至可以促进降水的酸化 ,这种污染特征也是上述观测点发生酸性降水的重要原因之一。

Study and analysis of acidifying buffer capacity of aerosols

In order to understand relations between atmospheric aerosols and acidic precipitation ,acidity of inhalable particulates (PM 10 ) at different sites in northern and southern China is analyzed Micro titration is adopted to determine their acidifying buffer capacity Results shows that aerosols have certain acidity and their acidifying buffer capacity for acidification is rather low; and even it can promote the formation of acidic precipitation Such kind of pollution characteristic is also one of important causes accounting for the occurrence of acidic precipitation at the above sites