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首页> 外文期刊>Air quality, atmosphere & health >Assessment of exposure to outdoor BTEX concentrations on the Saint Regis Mohawk Tribe reservation at Akwesasne New York State
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Assessment of exposure to outdoor BTEX concentrations on the Saint Regis Mohawk Tribe reservation at Akwesasne New York State

机译：在纽约州阿克韦萨斯纳的圣瑞吉斯莫霍克部落保留地评估暴露于室外BTEX浓度

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摘要

A community and personal exposure assessment was performed to evaluate the benzene concentrations on the St. Regis Mohawk Tribe (SRMT) reservation at Akwesasne. The reservation is divided by the USA–Canada border. Located to the west of the reservation is a large aluminum smelter that routinely emits approximately 29,000 pounds of benzene per year. The objective of the campaign was to determine the benzene, toluene, ethyl benzene, and xylenes (BTEX) concentrations in ambient air on the reservation and characterize the benzene sources. These emissions, given the prevailing winds, could impact the SRMT community and may be a significant source of benzene on the reservation. However, the reservation has approximately 15 gas stations, a casino, and a major roadway (State Route 37) transecting it. Prior work has shown that traffic was the predominant source of benzene, and the smelter was not a significant contributor to airborne benzene. To asses exposure across the reservation, BTEX samples were collected at nine locations distributed across the reservation using 6-L stainless steel silonite canisters for 24 h every 6th day between May 2007 and July 2008. In addition, personal sampling using miniature canisters was conducted for 20 subjects selected from workers in the following microenvironments: restaurants, gas filling stations, solid waste collection, day care centers, casinos, offices (smoking and non-smoking) as well as vehicle repair shops. The samples were concentrated using a cryogenic preconcentrator and analyzed by GC/MS/FID. Moderate seasonal variability in BTEX concentrations was observed at all the sampling locations with fall and winter having higher concentrations than summer and spring. The sampling locations near busy roads and intersections had the highest BTEX concentrations. The highest BTEX personal exposures were observed at the gas stations and at the repair shop.
机译：在Akwesasne的瑞吉莫霍克部落（SRMT）保留地上进行了社区和个人接触评估，以评估苯的浓度。保留地除以美国-加拿大边界。位于保留区西侧的是一座大型铝冶炼厂，每年通常排放约29,000磅苯。该运动的目的是确定保留环境空气中的苯，甲苯，乙苯和二甲苯（BTEX）浓度，并表征苯来源。鉴于盛行风，这些排放物可能会影响SRMT社区，并且可能是保留物中苯的重要来源。但是，该保留地大约有15个加油站，一个赌场和一条横穿该道路的主要道路（37号州际公路）。先前的工作表明，交通是苯的主要来源，而冶炼厂并不是空气中苯的重要来源。为了评估整个保留区的暴露程度，在2007年5月至2008年7月之间，每6天使用6升不锈钢白云母罐在分布于整个保留区的9个地点收集BTEX样品，持续24小时。此外，还使用微型储罐进行了个人采样从以下微环境的工人中选出20个主题：饭店，加气站，固体废物收集，日托中心，赌场，办公室（吸烟和不吸烟）以及汽车维修店。使用低温预浓缩器浓缩样品，并通过GC / MS / FID分析。在所有采样地点，BTEX浓度均出现了适度的季节性变化，秋季和冬季的浓度均高于夏季和春季。繁忙道路和交叉路口附近的采样位置的BTEX浓度最高。在加油站和维修店中，BTEX的个人暴露量最高。

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