【摘要】 2014年7月和12月分别对沈阳市大气污染物PM₁₀（可吸入颗粒物）进行采样分析,采样期内PM₁₀浓度全部超过国家一级标准,最大值超出国家二级标准3.3倍。用离子色谱法分析了PM₁₀中的水溶性无机阴离子,结果表明:4种阴离子浓度之和的变化总趋势为7月<12月;各离子浓度的关系为SO₄^2->NO₃^->Cl^->F^-,4种离子浓度均为冬季高于夏季;对PM₁₀及4种阴离子进行相关性分析,得出NO₃^-、SO₄^2-浓度与PM₁₀浓度呈显著正相关,是PM₁₀的重要组分,并通过NO₃^-与SO₄^2-的质量比得出沈阳市大气污染物中水溶性组分主要来自于固定排放源。更多还原

【Abstract】 As the air pollutant in Shenyang City,PM₁₀ was sampled and analyzed in July and December 2014.It was found that the concentrations of PM₁₀ during the sampling periods all exceeded the national primary standard seriously,with the maximal exceeding the standard by 3.3 times.Then,ion chromatography was used to study water soluble inorganic anions in PM₁₀.The results showed that the general variation trend of the sum of four kinds of anion concentrations was lower in July than that in December.The concentration of SO₄^2- was the highest,followed by NO₃^-,Cl^- and F^- in a descending order.Concentrations of the four ions were all higher in winter than those in summer.Correlation analysis was also carried out towards PM₁₀ and the four anions.The concentrations of NO₃^- and SO₄^2- were found to be significantly positively related with the concentration of PM₁₀ and therefore they were the important components of PM₁₀.By the quality ratio of NO₃^- to SO₄^2-,it was concluded that the water-soluble components in the air pollutants in Shenyang were mainly from stationary emission sources.更多还原