Indoor and outdoor concentrations of inorganic acidic aerosols and gases.

IF 2.7 4区环境科学与生态学

Journal of the Air & Waste Management Association Pub Date : 1991-02-01 DOI:10.1080/10473289.1991.10466834

M Brauer, P Koutrakis, G J Keeler, J D Spengler

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引用次数: 93

Abstract

Annular denuder-filter pack sampling systems were used to make indoor and outdoor measurements of aerosol strong H+, SO4(2-), NH4+, NO3- and NO2-, and the gaseous pollutants SO2, HNO3, HONO and NH3 during summer and winter periods in Boston, Massachusetts. Outdoor levels of SO2, HNO3, H+ and SO4(2-) exceeded their indoor concentrations during both seasons. Winter indoor/outdoor ratios were lower than during the summer, probably due to lower air exchange rates during the winter period. During both monitoring periods, indoor/outdoor ratios of aerosol strong H+ were 40-50 percent of the indoor/outdoor SO4(2-) ratio. Since aerosol strong acidity is typically associated with SO4(2-), this finding is indicative of neutralization of the acidic aerosol by the higher indoor NH3 levels. Geometric mean indoor/outdoor NH3 ratios of 3.5 and 23 respectively were measured for the summer and winter sampling periods. For HONO, NH3, NH4+ and NO2-, indoor concentrations were significantly higher than ambient levels. Indoor levels of NO3- were slightly less than outdoor concentrations.

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室内和室外无机酸性气溶胶和气体的浓度。

在美国马萨诸塞州波士顿市夏季和冬季，采用环形滤包采样系统对室内和室外气溶胶强H+、SO4(2-)、NH4+、NO3-和NO2-以及气态污染物SO2、HNO3、HONO和NH3进行了测量。室外SO2、HNO3、H+和SO4(2-)浓度均高于室内。冬季室内/室外比率低于夏季，可能是由于冬季的空气交换率较低。在两个监测期间，室内/室外气溶胶强H+比值为室内/室外SO4(2-)比值的40- 50%。由于气溶胶的强酸性通常与SO4(2-)有关，因此这一发现表明，较高的室内NH3水平可以中和酸性气溶胶。夏季和冬季采样期室内/室外NH3的几何平均值分别为3.5和23。室内的HONO、NH3、NH4+和NO2-浓度显著高于环境水平。室内NO3-浓度略低于室外浓度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Air & Waste Management Association 环境科学-工程：环境

自引率

3.70%

发文量

审稿时长

6 months

期刊介绍： The Journal of the Air & Waste Management Association (J&AWMA) is one of the oldest continuously published, peer-reviewed, technical environmental journals in the world. First published in 1951 under the name Air Repair, J&AWMA is intended to serve those occupationally involved in air pollution control and waste management through the publication of timely and reliable information.