延安大学SO2污染特征分析

为分析延安大学校园大气中SO2污染特征，采用甲醛吸收-副玫瑰苯胺分光光度法分别在采暖期和非采暖期测定了不同功能区（交通区、生活区、教学区）SO2日浓度变化。结果表明，监测时段内，SO2的平均浓度均达到国家环境空气质量标准的一级标准。延安大学校园大气中SO2浓度在采暖期大于非采暖期，高峰值分别在10：00-10：45和19：00-19：45两个时间段，SO2浓度日最低值在14：00-14：55时段。空间分布上：在采暖期，交通区的SO2日平均浓度最高，其次是生活区，教学区最低。非采暖期生活区最高，交通区和教学区比较接近。

Analysis of Pollution Characteristics of SO2 in Yanan University Areas

In order to analyse the pollution characteristics of SO2 in Yanan University,we measure the changes of sulfur dioxide concentration in the heating period and the non-heating period of the different functional areas（ traf-fic area,living area and teaching area）. The results showed that monitoring period,the average concentration of sul-fur dioxide to achieve the national ambient air quality standard was primary standard. Sulfur dioxide concentration of the Yanan University in the heating period was greater than the non-heating period,the trend of concentration first increased,then decreased and finally increased again in one day,two peak values are in the 10：00-10：45 and 19：00-19：45 time period,the sulfur dioxide concentration was minimum during 14：00-14：45 time period in one day. In space,traffic area. The daily average concentration of SO2 was the highest in heating period. ,the second was the living area. ,lowest teaching area. In the non-heating period,The highest was living area,traffic area was close to teaching area.