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2006年南京冬季浓雾雾水的化学组分 被引量:27

The chemical composition of fog water in the winter of 2006 of Nanjing.
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摘要 利用2006年12月24-27日南京外场观测试验资料和采集到的雾水样品化学分析资料,从雾水的化学组成及同月采集的雨水的比较、雾水离子间的相关性、雾水离子浓度与污染气体的关系等几方面,分析了南京雾水的化学特征.结果表明,南京雾水pH值介于4.24-7.27,多呈酸性;雾水离子浓度随时间有较大变化,这与雾的宏观和微物理结构有关;雾水中离子浓度与同时期(2006年12月上旬)雨水中的离子浓度以及污染气体的浓度变化趋势有一致性.如,雾水SO4^2-和NO3^-的浓度在25日14:30-19:55有1个峰值,而污染气体的峰值则相对提前,大约在13:00-14:00,随后气体和离子的浓度都逐渐降低. Using in situ experimental data and collected fog water samples on 24-27 December, 2006 in Nanjing, a study was made of chemical characteristics of the samples, with the results compared to those of rain water gleaned in that month in terms of inter-ion correlativity, ion concentration in relation to polluting gases. Evidence suggested the pH values of the fog water samples ranged over 4.24 to 7.27, mostly exhibiting acidity and the ion concentration changed more appreciably as a function of time, in close association with macroscopic and microphysical structures of the fog process, and the ion concentration in the fog water varied similarly to those of rain water and polluting gases collected in the first decade of the month. For example, while the concentration of SO4^2- and NO3^- reached a peak during 14:30 to 19:55, the peak of the air pollution was comparatively ahead of this time, approximately 13:00 to 14:00. Afterwards, the concentration air pollution and ions decreased gradually.
出处 《中国环境科学》 EI CAS CSCD 北大核心 2008年第5期395-400,共6页 China Environmental Science
基金 中国气象局研究型业务项目(YW200601) 江苏省自然科学基金资助项目(BK200727) 江苏省气象局重点项目(200601)
关键词 南京 浓雾 化学组分 酸雾 空气污染 Nanjing heavy fog chemical composition acid fog air pollution
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