【作者】 唐寒冰； 刘龙波； 吴艳敏； 张志弘；

【Author】 Tang Han-bing, Liu Long-bo,Wu Yan-min , Zhang Zhi-hong Northwest Institute of Nuclear Technology, P. O. Box 69-14, Xi’an, China, 710024

【机构】 西北核技术研究所；

【摘要】 大气颗粒物的组分分析是污染来源解析的基础,在对大气中某些痕量组分进行研究时,需要使用超大流量气溶胶采样器。超大流量气溶胶采样器在实际使用中常常会出现由于大气颗粒物污染严重导致滤材堵塞的问题,使取样流量剧烈下降或抽气泵停止运行,造成该样品的空气取样体积不足。滤材联用技术与分级采样技术是目前技术条件下延缓滤材堵塞的两种重要方法,这两种方法各具优缺点。为了系统地评估这两种技术方法在延缓滤材堵塞方面的效果,本文选取了4种粗效滤材,在实验室现有条件下,模拟发生沙尘期与采暖期的大气颗粒物,比较了滤材联用技术与分级采样技术在这两种不同污染情况下的使用情况,并对实验结果进行了分析,推荐使用分级采样技术来延缓滤材堵塞。更多还原

【Abstract】 Compositions analysis of atmospheric particles is the basis of pollution source apportionment. It is necessary to collect atmospheric aerosols by ultrahigh-vloume aerosol samplers for some of ultra-trace compositions analysis in atmospheric research. The severe atmospheric pollution often cause filter clogging on ultrahigh-volume aerosol samplers. Multistage filtration and size-fractionating sampling are two prospective methods to resolve the problem. The typical atmospheric particulate pollution was simulated in our laboratory and both methods were investigated. The results showed that the size-fractionating sampling was a better method for lessening filter clogging.更多还原