| 北京市夏季城近郊区大气醛类含量及分布规律探讨 |
| 摘要点击 762 全文点击 966 投稿时间：1992-04-27 |
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| 中文关键词 甲醛 总醛 大气 北京市 |
| 英文关键词 formaldehyde total aldehyde atomospheric pollution automobile pollution photochemical reaction |
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| 中文摘要 |
| 在1986和1987年夏,对北京市城郊几个测点进行了大气甲醛和总醛的采样分析.用酚试剂法测总醛,乙酰丙酮法测甲醛。1986和1987二年大气总醛浓度平均值分别为18.5和9.9μg/m3;1987年夏大气甲醛浓度平均值为4.4μg/m3.甲醛约占总醛的50%.甲醛和总醛浓度的日变化呈双峰形,其浓度的高低与机动车密度,气象条件等关系密切.北京大气醛类化合物浓度水平是一次污染与二次污染的叠加结果。 |
| 英文摘要 |
| The concentrations of formaldehyde (HCHO) and total aldehyde (TCHO) in the ambient air of Beijing city in the summer of 1986 and 1987 were determined. Formaldehyde was analyzed with Nash method and total aldehyde was determined with MBTH method. Averaldehyde concetrations in the ambient air were 18.5 for 1986 and 9.9μg/m3 for 1987, respectively. The average formaldehyde concentration was 4.4μg/m3 for 1987, which accouted for around 50% of total aldehyde statisical analysis of the data from the two year's observation shows the effects of traffic automobile and reaction on the concentration of aldehyde. The results suggests that the appearance photochemical of aldehyde compounds in Beijing ampient air was caused by both first and second pollutions. |
