Ambient bioaerosol indices for indoor air quality assessments of flood reclamation
Ambient bioaerosol indices for indoor air quality assessments of flood reclamation
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DOI：
10.1016/j.jaerosci.2004.11.018
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发表时间：
2005-05-01
影响因子：
4.5
通讯作者：
Hernandez, MT
中科院分区：
文献类型：
--
作者：
Fabian, MP;Miller, SL;Hernandez, MT
在干旱地区的住宅中进行了一项空气质量研究，这些住宅在一次大规模地区洪水（美国科罗拉多的阿肯色州河）后被清理并重新入住。这项示范研究利用一套气溶胶测量来评估常见的洪水围垦做法对室内空气质量的影响。这些分析包括（i）空气中颗粒物（光学直径0.3-5 μ m）的光学计数（OPC），（ii）挥发性有机化合物（VOC）的综合观察，（iii）空气中细菌和真菌的培养和直接显微计数，以及（iv）空气交换率测量。根据OPC的判断，大多数被洪水破坏的房屋在室内的空气中颗粒物浓度高于室外;对于选定的VOC也观察到了同样的趋势。与大型文献数据库相比，从洪水破坏中回收的房屋中收集的空气样本培养的空气微生物水平明显高于没有发生洪水破坏的房屋，在许多情况下，这种差异在两到三个数量级之间。如通过直接落射荧光显微镜测定的，总空气微生物浓度比通过常规培养回收的浓度高3-1000倍。在洪水破坏的房屋中，生物颗粒平均占室内测量的总颗粒的52%，占室外立即测量的总颗粒的18%。室内和室外的空气中颗粒物，微生物和相关的挥发性有机化合物的浓度之间的相对差异，表明洪水影响的建筑材料维持高气溶胶bidens，并导致恶劣的室内空气质量超过3个月后，结构已从洪水破坏回收。(c)2004爱思唯尔有限公司保留所有权利。
An air quality study was conducted in arid-region residences that were cleaned and reoccupied following a major regional flood (Arkansas River, Colorado, USA). This demonstration study leveraged a suite of aerosol measurements to assess the effects of common flood reclamation practices on indoor air quality. These assays included (i) optical counting (OPC) of airborne particulate matter (0.3-5 mu m optical diameter), (ii) composite observations of volatile organic compounds (VOC), (iii) culturing and direct microscopic counts of airborne bacteria and fungi, and (iv) air-exchange rate measurements. As judged by OPC, most of the flood damaged homes surveyed had higher concentrations of airborne particulate matter indoors than outdoors; the same trend was observed for selected VOC. When compared to large literature databases, culturing from air samples collected in houses reclaimed from flood damage had significantly higher airborne microorganism levels than in houses where no flood damage had occurred-in many cases this difference was between two and three orders of magnitude. As determined by direct epifluorescence microscopy, total airborne microorganism concentrations were 3-1000 times higher than those recovered by conventional culturing. In flood damaged homes, biological particles averaged 52% of the total particles measured indoors, and 18% of the total particles measured immediately outdoors. Relative differences between the indoor and outdoor concentrations of airborne particulate matter, microorganisms, and associated VOCs, suggested that flood-impacted building materials were sustaining high aerosol bioburdens and contributing to poor indoor air quality more than 3 months after the structures had been reclaimed from flood damage. (c) 2004 Elsevier Ltd. All rights reserved.