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首页> 外文期刊>Journal of Atmospheric Pollution >Particulate Matter and Staff Exposure in an Air-Conditioned Office in Akwa Ibom State University – Nigeria
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Particulate Matter and Staff Exposure in an Air-Conditioned Office in Akwa Ibom State University – Nigeria

机译：尼日利亚阿夸伊博姆州立大学空调办公室内的微粒物质和员工暴露

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Indoor air quality parameters were investigated in an occupied air–conditioned office and unoccupied air–conditioned office located in the Faculty of Natural and Applied Sciences Complex in Akwa Ibom State University – Nigeria, during the rainy (June – July) and dry (November – December) seasons of 2016. Particulate matter (PM1, PM2, PM5, PM10), temperature, relative humidity, carbon monoxide (CO) and carbon dioxide (CO2) levels were simultaneously measured in fourteen (14) sampling days using Fluke 985 Particle Counter and Fluke 975 AirMeter. The concentrations of particulate matter in the occupied air–conditioned office during the rainy season ranged from 5152 – 5984 μg/m3 for PM1; 2744 – 3015 μg/m3 for PM2; 137 – 149 μg/m3 for PM5 and 36 – 50 μg/m3 for PM10 and in the unoccupied air–conditioned office, the concentrations of particulate matter ranged from 1898 – 2556 μg/m3 for PM1; 987 – 1311 μg/m3 for PM2; 38 – 59 μg/m3 for PM5 and 15 – 24 μg/m3 for PM10. During the dry season, the concentrations of particulate matter in the occupied air–conditioned office ranged from 5852 – 6510 μg/m3 for PM1; 4490 – 4992 μg/m3 for PM2; 335 – 362 μg/m3 for PM5 and 59 – 69 μg/m3 for PM10 and in the unoccupied air–conditioned office, the concentrations of particulate matter ranged from 2598 – 3112 μg/m3 for PM1; 1168 – 1694 μg/m3 for PM2; 153 – 257 μg/m3 for PM5 and 29 – 42 μg/m3 for PM10. This study has revealed that the particulate matter (PM1, PM2, PM5, PM10) concentrations in an occupied air–conditioned office were significantly (P < 0.001) higher than those obtained in unoccupied air–conditioned office during both rainy and dry seasons. However, the concentrations of PM10 obtained in the present study were found to be much lower than the ambient maximum contaminant level for airborne PM10 standard promulgated by the United States Environmental Protection Agency (USEPA) (150 μg/m3 daily average and 50 μg/m3 annual average) and World Health Organization (WHO) PM10 guidelines values (50 μg/m3 daily average and 20 μg/m3 annual average). Although there were no significant relationships among PM1, PM2, PM5, and PM10 in occupied air-conditioned office, correlation analysis indicated that PM1, PM2 and PM5 were significantly correlated at P < 0.01 in unoccupied air-conditioned office and correlation coefficients were different. Apart from suspended atmospheric dust and settling dust, human activities in the occupied air–conditioned office significantly influenced the particulate matter concentrations obtained compared to those obtained in unoccupied air–conditioned office in both rainy and dry seasons. Although the concentrations of CO and CO2 were below detection limit (BDL), they indicated adequate air exchange at the time of the assessment in the air–conditioned office during the sampling period. The results obtained have revealed important contributions towards the understanding of particulate matter distribution patterns and provided baseline data that can be used for potential identification of human health risks associated with airborne particulate matter in air–conditioned offices in Akwa Ibom State University – Nigeria.
机译：在多雨（6月至7月）和干燥（11月至11月）期间，分别在尼日利亚阿克瓦伊博姆州立大学自然与应用科学学院的有人居住的空调办公室和非有人居住的空调办公室调查了室内空气质量参数。 2016年12月）季节。使用Fluke 985粒子计数器在十四（14）个采样日中同时测量了颗粒物（PM1，PM2，PM5，PM10），温度，相对湿度，一氧化碳（CO）和二氧化碳（CO2）水平和Fluke 975 AirMeter。雨季期间，被占用的空调办公室中的颗粒物浓度为5152 – 5984μg/ m3。 PM2为2744 – 3015μg/ m3; PM5为137 – 149μg/ m3，PM10为36 – 50μg/ m3，在空置的空调办公室中，PM1的颗粒物浓度范围为1898 – 2556μg/ m3; PM2 987 – 1311μg/ m3; PM5为38 – 59μg/ m3，PM10为15 – 24μg/ m3。在干旱季节，PM1占用的空调办公室中的颗粒物浓度范围为5852 – 6510μg/ m3。 PM2为4490 – 4992μg/ m3; PM5为335 – 362μg/ m3，PM10为59 – 69μg/ m3，在空置的空调办公室中，PM1的颗粒物浓度范围为2598 – 3112μg/ m3; PM2为1168 – 1694μg/ m3;对于PM5为153 – 257μg/ m3，对于PM10为29 – 42μg/ m3。这项研究表明，在雨季和旱季，有人居住的空调办公室中的颗粒物（PM1，PM2，PM5，PM10）浓度显着高于（P <0.001）空置的办公室。但是，发现本研究中获得的PM10浓度远低于美国环境保护局（USEPA）颁布的机载PM10标准的环境最大污染物水平（日平均150μg/ m3和50μg/ m3年度平均值）和世界卫生组织（WHO）的PM10准则值（每日平均值50μg/ m3和每年平均值20μg/ m3）。尽管在居住的空调办公室中PM1，PM2，PM5和PM10之间没有显着的相关性，但相关分析表明，在闲置的空调办公室中PM1，PM2和PM5显着相关，P <0.01，并且相关系数不同。除了悬浮的大气尘埃和沉淀尘埃之外，在雨季和干旱季节，与在空置的空调办公室中获得的颗粒物浓度相比，在被占用的空调办公室中的人类活动显着影响了所获得的颗粒物浓度。尽管CO和CO2的浓度低于检出限（BDL），但在评估期间，他们表示在采样期间在空调办公室进行了足够的空气交换。获得的结果揭示了对理解颗粒物分布模式的重要贡献，并提供了可用于识别尼日利亚阿夸伊博姆州立大学空调办公室中与空气传播的颗粒物有关的人类健康风险的基准数据。

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