商业厨房操作产生各种各样的气相反应性物种
Leigh R Crilley1, Jenna C Ditto2,3, Melodie Lao1
1Department of Chemistry, York University, Canada. tvandenb@yorku.ca.
Environmental science. Processes & impacts
|November 1, 2024
概括
活性物种 (Nr) 影响室内空气质量. 这项针对商业厨房的研究发现,和清洁会排放出显著的Nr,稳定的水平表明大型室内表面储会影响空气质量.
科学领域:
- 室内空气质量研究室内空气质量研究
- 大气中的化学成分
- 环境科学环境科学
背景情况:
- 气相反应性物种 (Nr) 显著影响室内空气质量.
- 和清洁活动是室内Nr排放的主要来源,因活动和材料而异.
- 商业厨房,高和清洁量,提供理想的设置来研究排放因子.
研究的目的:
- 量化Nr总预算,并确定商业厨房中的关键物种 (NO,NO2,HONO,NH3).
- 调查和清洁所产生的Nr排放的日间模式和来源.
- 用先进的质谱学识别未测量的Nr物种.
主要方法:
- 在两个星期内在商业厨房中部署新型仪器,以测量总Nr (tNr).
- 对NO,NO2,酸性Nr (HONO) 和基本的Nr (NH3) 的量化.
- 使用质子转移反应质谱仪 (PTR-MS) 进行同位测量,以识别Nr物种.
主要成果:
- 观察到的最高tNr水平是在早上,主要是由过程中的NO驱动的.
- 尽管空气变化率很高,但HONO和基本Nr水平在全天保持了意想不到的稳定.
- 一个显著的分数 (大约. 5 ppbv) 的tNr没有被计算出来,可能是中性物种,在肉过程中发现了胺,在清洁过程中发现了胺.
结论:
- 和清洁是商业厨房中各种Nr物种的重要来源.
- 稳定的室内Nr水平表明有大量的表面水库,可以通过通风影响室内和室外空气质量.
- 胺和胺被确定为关键的Nr物种,分别与和清洁有关.
相关概念视频
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Reaction Quotient...
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
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