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首页> 外文期刊>Annals of work exposures and health. >Workplace Respiratory Protection Factors during Asbestos Removal Operations
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Workplace Respiratory Protection Factors during Asbestos Removal Operations

机译：石棉清除操作期间的工作场所呼吸保护因素

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Numerous changes have been made to the French labour regulations in recent years relating to the prevention of risks of exposure to asbestos fibres for operators removing asbestos-containing materials. These changes refer to the method used to count fibres, the collective and personal protective devices to be used on these worksites, and the occupational exposure limit value, which was reduced to 10 f.L-1 on 2 July 2015. In this context, this study assessed the level of respiratory protection afforded by supplied-air respirators and powered air-purifying respirators by monitoring exposure for several operators on nine worksites.The levels of dustiness measured in personal samples taken outside masks showed significant evidence of potential exposure during removal of asbestos-containing plaster or sprayed asbestos, and when using abrasive blasting to treat asbestos-containing materials. For these tasks outside concentration regularly exceeds 25000 f.L-1. Measurements inside masks were generally low, under 10 f.L-1, except in some situations involving the removal of asbestos-containing plaster. This partial penetration of fibres inside masks could be due to the high loading linked to this material. The distributions of Workplace Protection Factors obtained for the two types of respiratory protective devices studied were broad, and the fifth percentile values equal to 236 and 104, respectively, for supplied-air respirators and powered air-purifying respirators. This work highlights once again the need to prioritize collective protection when seeking to prevent asbestos-related risks.
机译：近年来，法国劳工法规已经进行了许多变化，该法规与防止含有含石棉材料的操作员的石棉纤维风险有关。这些更改是指用于计算纤维，用于这些工作人员的集体和个人保护设备的方法，以及在2015年7月2日将其降低至10 f.l-1的职业曝光限值。在此背景下，本研究评估了提供的空气呼吸器提供的呼吸防护水平和通过监测几位操作员在九个工作地点的接触暴露的呼吸器。含有石膏或喷雾石棉，并在使用磨料爆破时处理含石棉的材料。对于这些任务，浓度定期超过25000 f.l-1。面罩内部的测量通常低于10 f.l-1，除了在某些情况下涉及去除含石棉的石膏。纤维在口罩内的部分穿透可能是由于与该材料相关的高负载。所研究的两种类型的呼吸保护设备获得的工作场所保护因子的分布范围很大，对于提供的空气呼吸器和动力空气纯化的呼吸器，分别等于236和104的第五个百分位数。这项工作再次强调，在寻求防止与石棉相关的风险时，需要优先考虑集体保护。

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