论文部分内容阅读
人们将pH值低于5.6的酸性降水称之为酸雨。我国酸雨区主要集中在黄河以南地区,近些年,北方地区的酸性降雨增加明显。由于大量含二氧化碳、三氧化硫和氮氧化物等酸性物质气体排入空中,达到一定量后,随雨(雪)降于地面,这就是酸雨的形成原因。在我国,降酸雨已非鲜见,有些地方还相当
Acid rain, which has a pH below 5.6, is called acid rain. Acid rain areas in China are mainly concentrated in the areas south of the Yellow River. In recent years, the acid rain in the northern areas increased significantly. As a large number of acid gases containing carbon dioxide, sulfur trioxide and nitrogen oxides into the air, reaching a certain amount, with the rain (snow) down to the ground, which is the formation of acid rain. In our country, it is not uncommon to drop acid rain, and in some places it is still quite low