深圳市SO2污染来源及其特征分析

以珠江三角洲地区2004年SO2源排放清单、国家级气象站及深圳市气象站气象资料和空气质量监测数据为基础, 采用基于扩散模式的污染源解析技术对深圳市SO2污染来源进行研究. 利用非稳态气象和空气质量(CALPUFF)模拟系统,模拟外来污染源及深圳市局地污染源排放扩散行为,定量计算2类污染源对深圳市SO2浓度的贡献率,并分析其时空变化特征. 结果表明:珠江三角洲地区2004年SO2排放总量为72.9×104 t, 深圳市局地排放量约4.65×104 t;深圳市SO2污染是由局地污染源和外来污染源排放共同作用的结果, 对SO2的贡献率分别约为75%和25%, 表明局地污染源排放是深圳市SO2污染的最主要来源.

Source Apportionment and Characteristics of SO2 in Shenzhen City

Source apportionment of SO₂ in Shenzhen City was done using diffusion model-basedsource apportionment technology. The apportionment was based on SO₂ emission inventories for the year 2004 in the Pearl River Delta Region, national and local meteorological station data, and air quality monitoring data. Diffusion behaviors of SO₂ emitted from both outside and within Shenzhen City were simulated using the CALPUFF diffusion model. Share percentages of the mass concentration of SO2 in Shenzhen City from local and external sources were quantitatively calculatedusing a statistical analytical method, and the source apportionment and temporal and spatial distribution characteristics of SO₂ in Shenzhen City were studied. The results reveal that the total emission amount of SO₂ in the Pearl River Delta Region was 729,000 tons, and the amount of SO₂ emitted from local sources in Shenzhen City was about 46,500 tons. SO₂ pollution in Shenzhen City resultsfrom both local emissions and external emissions from peripheral cities; the contribution of external sources to SO₂ in Shenzhen City was 25%, whereas that of local sources was 75%. Local emissions of SO₂ are the main sources of SO₂ air pollution in Shenzhen City.