盛夏时节成都市区空气飘尘浓度及分散度测试分析

利用光散射法对盛夏时节成都市区空气中的风尘浓度及分散度进行了测试，并就风尘的粒径分布及分散度的统计模式、气象参数时飘尘浓度的影响，以及飘尘浓度和分散度的日变化进行了分析。结果表明：成都市区空气中飘尘的大多数粒径分布的统计模式为Ｊｕｎｇｅ分布，峰值浓度出现在中午１２：００前后，相对湿度对空气中飘尘浓度影响显著，降雨对风尘有明显的清除作用。测试结果对评价城市环境卫生条件和分析人类活动对环境的干扰情况有参考价值。

Concentrations and Size Distributions of Aerosols in Middle Summer of Chengdu

Statistical concentrations and sizedistributions of aerosols in middle summer of Chengducity were measured by using optical scatteringmethod. The influence of climate and its daily changeaffects on the concentration and distribution were anal-ysed.The results showed:many of the distributionsagreed with the junge distribution;the peak concen-tration appeared near the noon; the relative humidityhad strong influence on concentration; the clean-up ef-fect of rain fall was evident. The measured results areuseful for evaluat ing the environmental sanitation ofthe citv.