Maghsoodi Moghadam Rohollah, Bahrami Abdulrahman, Ghorbani Farshid, Mahjub Hossein, Malaki Dariush
Department of Occupational Health, School of Public Health, Ilam University of Medical Sciences, Ilam, Iran.
J Res Health Sci. 2013 May 29;13(1):69-74.
Volatile organic compounds (VOCs) are human-made chemicals widely spread in the environment and produced by petrochemical industries and petroleum refineries. The aim of this research was to evaluate the distribution of VOCs in the ambient air of Mahshahr Petrochemical Complex, Iran.
This study was a cross-sectional research performed in 2009. We used the method numbered 1501, 1500, 2000, 1003, 1005, 1010, 2555, 1300 and 1400 of the National Institute of Occupational Safety and Health (NIOSH) for the sampling and analysis of compounds in the air. A total of 204 samples were analyzed using Gas Chromatography-Mass Spectrometry (GC-MS) and a Gas Chromatography-Flame Ionization Detector (GC-FID).
The mean of concentrations of the pollutants in the winter is less than in summer and a strong variation occurred among the sampling site, attributed to the change in meteorology. The results indicated high concentrations of benzene in most factories. In addition, a significant difference occurred between the concentrations of the compounds in the ambient air inside and outside the factories in both seasons (P<0.050).
It seems that the atmospheric conditions of the workplace affect the spreading of the pollutants, causing the concentration of the pollutants in the summer to be higher than in the winter. In addition, the frequent prevailing wind speed in the region plays a major role in the distribution of the pollutants from Mahshahr Petrochemical factories.
挥发性有机化合物（VOCs）是人为制造的化学物质，广泛分布于环境中，由石化行业和炼油厂产生。本研究的目的是评估伊朗马赫沙尔石化综合设施周围空气中挥发性有机化合物的分布情况。
本研究是2009年进行的一项横断面研究。我们使用美国国家职业安全与健康研究所（NIOSH）的编号为1501、1500、2000、1003、1005、1010、2555、1300和1400的方法对空气中的化合物进行采样和分析。总共204个样本使用气相色谱-质谱联用仪（GC-MS）和气相色谱-火焰离子化检测器（GC-FID）进行了分析。
冬季污染物浓度均值低于夏季，且采样点之间存在很大差异，这归因于气象变化。结果表明大多数工厂中苯的浓度较高。此外，两个季节工厂内外环境空气中化合物的浓度存在显著差异（P<0.050）。
工作场所的大气条件似乎会影响污染物的扩散，导致夏季污染物浓度高于冬季。此外，该地区频繁出现的盛行风速在马赫沙尔石化工厂污染物的分布中起主要作用。
