慈溪大气PM_(10)及其水溶性离子污染特征研究

Research on Pollution Patterns of PM_(10) and Its Water-Soluble Ions in the Atmosphere of Cixi,China

研究了慈溪市大气中PM10及其水溶性离子的分布特征。通过对慈溪市四个季度的PMi。监测，获得其年间浓度水平变化，了解其时空分布及相关性。对实验数据分析得知，PM10及其水溶性离子浓度与气压、气温有关。含量最高的水溶性离子是NH4+离子，浓度范围在0.01~10.85pg/m3;其次是N03-,浓度范围在0.14~7.78^g/m3;再次是SO/'浓度范围在0.05~6.62^g/m3;最低的CT的浓度范围在0.02~1.82^g/m3。S0/_、N03_、Cl_的浓度市区高于乡镇。NH/的浓度乡镇高于市区。水溶性离子的浓度整体冬季浓度高于夏季。污染主要来源于汽车尾气与工业燃煤。

The pollution patterns of PM10 and its water - soluble ions in the atmosphere of Cixi were studied. In this experiment, the seasonal vibration of PM10 concentration was analyzed as well as its spatial distribution based on the monitoring data. The experimental data indicated that the concentration of PM10 and its water - soluble ions had close correlation with air pressure and temperature. The highest content of water - soluble ion was NH4 + with a concentration range of 0? 01 ?10. 85 (xg/m3 ? The second one was N03 - within a concentration range of 0? 14 7. 78(xg/m3, followed by S042_ within a range of 0? 05 ?6. 62(xg/m3. The lowest ion was Cl~ . Its concentration was between 0. 02 and 1. 82(xg/m3. All of the concentration of S042- , N03 - and Cl ~ were higher in urban area than that in rural area. However, the concentration of NH4 + in villages was higher. Overall, the concentration of water - soluble ions in winter was higher than in summer. Pollution sources mainly came from vehicle exhaust and industrial coal - burning.