【摘要】 本文介绍南京市区降水的酸度及若干离子的测定结果.结果表明:降水酸度是随时间变化的,1982年降水的酸度比前两年有增加;降水过程中降水初期的pH值一般比较大,然后变小,后期又有所回升;降水中硫酸根[SO₄⁼]与硝酸根[NO₃^-]之比一般约为5:1,而雷阵雨降水中它们之比约为3:1.这可能是由于南京市区降水中以硫污染物为主.更多还原

【Abstract】 In this paper the determinations of acidity and some ions in the precipitation over urban area of Nanjing are presented. These determinations show that the precipitation acidity varies with time. The acidity of precipitation in 1982 is increased compared to the values in the past two years, During the course of rainfall, its pH value is greater at the initial stage of precipitation, then it decreases, and finally it increases slightly. The ratio of sulfate to nitrate ions is about 5:1, but about 3:1 in thunderstorm precipitation. This probably is due to the fact that sulfur pollutants are prevailing in the precipitation of Nanjing.更多还原