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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >The Concentration of BTEX in the Air of Tehran: A Systematic Review-Meta Analysis and Risk Assessment
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The Concentration of BTEX in the Air of Tehran: A Systematic Review-Meta Analysis and Risk Assessment

机译：德黑兰空气中BTEX的浓度：系统评价-元分析和风险评估

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摘要

In the current study, the concentration of some pollutants which are categorized as volatile organic compounds (VOCs), including benzene (B), toluene (T), ethylbenzene (E), and o-xylenes (o-X), in the air of Tehran was evaluated by the aid of a systematic review and meta-analysis approach. Also, the health risk for the exposed population was estimated using the recommended methods by the Environmental Protection Agency (EPA). The rank order based on their concentration in BTEX was benzene (149.18 µg/m3: 31%) > o-xylene (127.16 µg/m3: 27%) > ethylbenzene (110.15 µg/m3: 23%) > toluene (87.97 µg/m3: 19%). The ratio B/T in this study was calculated as 1.69, repressing that both stationary and mobile sources of emission can be considered as the main sources for benzene and toluene. Moreover, strong photochemical activity in Tehran was demonstrated by the high ratio of E/o-X. Meta-regression indicates that the concentration of BTEX has insignificantly (p-value > 0.05) increased over time. The BTEX compounds based on the target hazard quotient (THQ) were ordered as benzene > o-xylene > ethylbenzene > toluene. Percentile 95% of THQ due to benzene (4.973) and o-xylene (1.272) was higher than a value of 1. Percentile 95% excessive cancer risk (ECR) for benzene (1.25 × 106) and ethylbenzene (1.11 × 106) was higher than a value of 1.00 × 106. The health risk assessment indicated that the population of Tehran are at considerable non-carcinogenic and carcinogenic risks.
机译：在本研究中，德黑兰空气中某些污染物的浓度被归类为挥发性有机化合物（VOC），包括苯（B），甲苯（T），乙苯（E）和邻二甲苯（oX）。借助系统评价和荟萃分析方法进行了评估。此外，环境保护署（EPA）使用推荐的方法估算了受感染人群的健康风险。基于它们在BTEX中的浓度的排序为苯（149.18 µg / m 3 ：31％）>邻二甲苯（127.16 µg / m 3 ：27％）>乙苯（110.15 µg / m 3 ：23％）>甲苯（87.97 µg / m 3 ：19％）。在本研究中，B / T比为1.69，这表明固定排放源和移动排放源均可被视为苯和甲苯的主要排放源。此外，高比例的E / o-X证明了德黑兰具有很强的光化学活性。 Meta回归表明BTEX的浓度随时间的增加微不足道（p值> 0.05）。基于目标危险商（THQ）的BTEX化合物的订购顺序为：苯>邻二甲苯>乙苯>甲苯。苯（4.973）和邻二甲苯（1.272）引起的THQ百分位数的95％高于值1。苯（1.25×10 6 ）百分百95％的过度癌症风险（ECR）乙苯（1.11×10 6 ）高于1.00×10 6 。健康风险评估表明，德黑兰人口面临相当大的非致癌和致癌风险。

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