成都市中心和航空港大气PM₁₀的酸度及其对酸雨的影响

【作者】 邱长燕； 印红玲； 于重水； 张超； 叶芝祥； 杨迎春；

【机构】 成都信息工程学院资源环境学院；

【摘要】 本论文采集了成都市中心和航空港春季大气PM₁₀和雨水样品,研究了大气PM₁₀和雨水的酸度和酸化缓冲能力,并利用离子色谱仪分析PM₁₀及雨水样品中主要酸性阴离子的含量和特性。研究表明,成都市中心和航空港大气PM₁₀具有一定的酸度和缓冲能力,能抑制降水的酸化。雨水酸度的主控因子是SO₄^2-,其中市中心和航空港雨水中SO₄^2-含量平均为55%和63%。PM₁₀中SO₄^2-含量平均为66%,故成都市中心和航空港大气大气PM₁₀和降雨均呈现燃煤硫氧化物型污染为主的特点。更多还原

【Abstract】 In order to study and analyze acidifying buffer capacity of PM₁₀ and rainwater,the samples in the center of Chengdu City and Airport area were collected in the spring of 2010. Acidic ions of PM₁₀ and rainwater were determined by Ion Chromatography,and their content and features were discussed.Results showed that PM₁₀ had certain acidty and their acidifying buffer capacity was rather low;and it could inhibit the formation of acidic precipitation.SO₄^2- was found to be the dominant acidic ion,its average content in the rainwater samples were about 55%and 63%in Chengdu City center and airport area,respectively.The content of SO₄^2- were 66%in PM₁₀,which indicated that the sources of PM₁₀ and rainwater in Chengdu was dominantly from coal burning.更多还原