东莞市酸性降水研究

Study of Acid Rain Pollution in Dongguan

根据东莞市2003-2007年大气降水监测数据，对酸雨污染特征、酸雨变化趋势及酸雨成因进行了分析。结果表明东莞市的降水以酸性居多，酸雨污染较为严重。SO^2-4、NO^-3、Ca^2＋和NH^＋4是组成降水的主要阴阳离子，酸雨污染呈逐年下降趋势。影响降水酸度的因素既有本地的固定排放源和流动排放源，也与进入大气中的微粒含量及气象条件等因素有关。

Taking the atmospheric precipitation monitoring data between the year of 2003 and 2007 in Dongguan City as the basis, this paper has analyzed the acid rain pollution characteristic, the changing trend and the reason of Dongguan City. The results show that most of the precipitation in Dongguan is acid rain, and acid rain pollution is rather serious. Also, a major component of acid rain is acid ions （SO4 ^2- , NO3^-） and alkaline ions （Ca^2＋ ,NH^＋）, acid rain poluution reduces year by year. pH values of acid precipitation are affected by not only fixed emission source and mobile emission source but also atmospheric particulate content and meteorological conditions and so on.