【摘要】 选择佛山科学技术学院江湾校区代表佛山市禅城区的酸雨监测点,利用2016～2019年大气降水监测数据,分析酸雨污染特征。结果表明:佛山市禅城区酸雨频率呈逐年下降而pH年均值呈逐年上升的趋势,酸雨污染有所缓和,春、夏季的酸雨重于秋、冬季,大气降水离子浓度大小依次为:NO^-₃>SO₄^2->NH⁺₄>Cl^->Ca²⁺>K⁺>NO^-₂>F^->Na⁺(Mg²⁺), NO^-₃和SO₄^2-是降水中主要阴离子,NH⁺₄和Ca²⁺是主要阳离子,这4种离子占总离子的82.9%,SO₄^2-/NO^-₃从2016年的1.12下降至2019年的0.62,酸雨污染类型由过去单一的硫酸型向硫酸-硝酸混合型转变。最后在分析酸雨成因的基础上提出一些控制酸雨污染的对策。更多还原

【Abstract】 This study selected Jiangwan Campus of Foshan University to represent the acid rain monitoring site in chancheng district of foshan city. It analyzed the pollution characteristics of acid rain by monitoring data of atmospheric precipitation from 2016 to 2019. The results indicated that the frequency of acid rain in Chancheng district of Foshan city had been decreased year by year while the annual average pH value of acid rain had gradually increased so that the acid rain pollution had been slightly alleviated. Moreover, acid rain in spring and summer was more serious than that in autumn and winter. The rank of the concentration of precipitation ions were as follows:NO^-₃>SO₄^2->NH⁺₄>Cl^->Ca²⁺>K⁺>NO^-₂>F^->Na⁺(Mg²⁺), which showed that NO^-₃ and SO₄^2- were the major anions in precipitation as well as NH⁺₄ and Ca²⁺ were the major cations, and these four ions accounted for 82.9% of the total ions. The ratio of SO₄^2- and NO^-₃ fell from 1.12 in 2016 to 0.62 in 2019, suggesting that the acid rain pollution type had changed from the past single sulfuric acid type to sulfuric acid-nitric acid mixed type. Finally, based on the analysis results of the causes of acid rain, proposed some strategies to control acid rain pollution.更多还原