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首页> 外文期刊>International Journal of Environmental Research and Public Health >Health Risk Assessment of Ambient Air Concentrations of Benzene, Toluene and Xylene (BTX) in Service Station Environments
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Health Risk Assessment of Ambient Air Concentrations of Benzene, Toluene and Xylene (BTX) in Service Station Environments

机译：服务站环境中苯，甲苯和二甲苯（BTX）的环境空气浓度的健康风险评估

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A comprehensive evaluation of the adverse health effects of human exposures to BTX from service station emissions was carried out using BTX exposure data from the scientific literature. The data was grouped into different scenarios based on activity, location and occupation and plotted as Cumulative Probability Distributions (CPD) plots. Health risk was evaluated for each scenario using the Hazard Quotient (HQ) at 50% (CEXP50) and 95% (CEXP95) exposure levels. HQ50 and HQ95 1 were obtained with benzene in the scenario for service station attendants and mechanics repairing petrol dispensing pumps indicating a possible health risk. The risk was minimized for service stations using vapour recovery systems which greatly reduced the benzene exposure levels. HQ50 and HQ95 1 were obtained for all other scenarios with benzene suggesting minimal risk for most of the exposed population. However, HQ50 and HQ95 1 was also found with toluene and xylene for all scenarios, suggesting minimal health risk. The lifetime excess Cancer Risk (CR) and Overall Risk Probability for cancer on exposure to benzene was calculated for all Scenarios and this was higher amongst service station attendants than any other scenario.
机译：使用科学文献中的BTX暴露数据，对服务站排放的人类暴露于BTX的有害健康影响进行了全面评估。数据根据活动，位置和职业分为不同的场景，并作为累积概率分布（CPD）图进行绘制。使用50％（C EXP50 ）和95％（C EXP95 ）暴露水平的危险商（HQ）评估每种情况下的健康风险。在服务站值班人员和维修汽油分配泵的技工维修的情况下，使用苯获得了HQ 50 和HQ 95 50 和HQ 95 <1均表明对大多数暴露人群而言风险最小。但是，在所有情况下，甲苯和二甲苯中还发现HQ 50 和HQ 95 <1，这表明健康风险最小。在所有情况下，都计算出了苯暴露时终生的癌症超额风险（CR）和癌症总体风险概率，在服务站值班人员中，这一比例高于任何其他场景。

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