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Seasonal variation of air quality in hospitals with indoor-outdoor correlations

机译：室内外相关的医院空气质量的季节性变化

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This study involved a seasonal exposure assessment in a hospital environment using several air quality indicators including carbon monoxide (CO), carbon dioxide (CO2), particulate matter (PM10, and PM2.5), and total volatile organic compounds (TVOCs). We examined the distribution of and variation in the indoor and outdoor pollutant concentrations in 12 working areas across three hospitals, with an emphasis on capturing seasonal variations. We assessed correlations between measured indoor and outdoor levels to quantify the importance of indoor sources on air quality relative to outdoor sources. Our results indicated that while indoor and outdoor CO levels were below air quality standards/guidelines, measured PM2.5 and PM10, concentrations at several locations exceeded the standards 2- to 3.5-fold. We generally recorded higher indoor PM levels during the warm season, particularly during regional desert storm events. The ingress of particles from the outdoor to indoor environment was evident with high correlations between indoor and outdoor PM2.5 (r between 0.83 and 0.92) and PM10, (r between 0.74 and 0.86) levels, particularly during the warm season. Indoor to outdoor (I/O) ratios of PM2.5 and PM10, were mostly 1. In contrast, indoor levels of CO2 and TVOCs exceeded outdoor concentrations during both the warm and cold seasons with I/O ratios 1 across all sampling locations. Our paper concludes with implications of high PM exposure and a suggested management framework for limiting such exposure in hospitals.
机译：这项研究涉及在医院环境中使用几个空气质量指标进行季节性暴露评估，其中包括一氧化碳（CO），二氧化碳（CO2），颗粒物（PM10和PM2.5）和总挥发性有机化合物（TVOC）。我们检查了三家医院在12个工作区域内室内和室外污染物浓度的分布和变化，重点是捕获季节性变化。我们评估了室内和室外水平之间的相关性，以量化室内源对空气质量相对于室外源的重要性。我们的结果表明，虽然室内和室外的CO水平低于空气质量标准/准则，但测得的PM2.5和PM10却在几个位置超过了标准的2到3.5倍。在温暖的季节，特别是在区域性沙漠风暴事件中，我们通常记录到较高的室内PM水平。室内和室外PM2.5（r在0.83和0.92之间）和PM10（r在0.74和0.86之间）之间的高度相关性，尤其是在温暖季节，颗粒从室外环境进入室内环境是明显的。 PM2.5和PM10的室内/室外（I / O）比大部分<1。相反，在温暖和寒冷的季节，室内的CO2和TVOC含量均超过室外浓度，所有采样的I / O> 1位置。本文的结论是高PM暴露的含义和建议的管理框架，用于限制医院中的此类PM暴露。

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