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首页> 外文期刊>The Annals of occupational hygiene. >Exposure and emission measurements during production, purification, and functionalization of arc-discharge-produced multi-walled carbon nanotubes.
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Exposure and emission measurements during production, purification, and functionalization of arc-discharge-produced multi-walled carbon nanotubes.

机译：在电弧放电生产的多壁碳纳米管的生产，纯化和功能化过程中的暴露和排放测量。

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摘要

The highest exposure to CNTs occurred during production of CNTs. The highest emitted number concentration of CNT-containing particles occurred in the sieving, mechanical work-up, pouring, weighing, and packaging of CNT powder during the production stage. To be able to quantify exposures and emissions of CNTs, a selective and sensitive method is needed. Limitations with measuring EC and respirable dust are that these exposure metrics do not measure CNTs specifically. Only filter-based methods with electron microscopy analysis are, to date, selective and sensitive enough. This study showed that counting of CNT-containing particles is the method that fulfils those criteria and is therefore the method recommended for future quantification of CNT exposures. However, CNTs could be highly toxic not only because of their length but also because they could contain, for example transition metals and polycyclic aromatic hydrocarbons, or have surface defects. Lack of standardized counting criteria for CNTs to be applied at the electron microscopy analysis is a limiting factor, which makes it difficult to compare exposure data from different studies.
机译：碳纳米管的最高暴露发生在碳纳米管的生产过程中。在生产阶段，对CNT粉末的筛分，机械处理，浇注，称重和包装过程中，出现的含CNT的颗粒的发射数量最高浓度。为了能够量化CNT的暴露量和排放量，需要一种选择性和灵敏的方法。测量EC和可吸入粉尘的局限性在于，这些暴露指标不能专门测量CNT。迄今为止，只有基于过滤器的电子显微镜分析方法才具有足够的选择性和灵敏度。这项研究表明，对包含CNT的颗粒进行计数是满足这些标准的方法，因此是建议将来对CNT暴露进行定量的方法。然而，CNT不仅由于其长度而且还因为它们可能包含例如过渡金属和多环芳族烃或具有表面缺陷而可能具有高毒性。缺乏用于电子显微镜分析的碳纳米管的标准化计数标准是一个限制因素，这使得很难比较不同研究的暴露数据。

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