College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, China.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2021;56(10):1058-1068. doi: 10.1080/10934529.2021.1962158. Epub 2021 Aug 6.
This study was undertaken to investigate the filtration effect of filter on nanoparticle and the deposition behavior of nanoparticle in the human respiratory system from the aspect of nanoparticle number during cigarette smoking. For that, two kinds of experiments were designed. One is machine experiment, a well-controlled simulated respiratory system was designed to measure the raw emission and filter effect. Another is human experiment, volunteers were asked to inhale smoke into the oral cavity only and lungs, respectively, to distinguish smoke path. Results revealed that effective inhaled nanoparticle amount of a Taishan and a Hongtaishan cigarette were 5.8E + 9 (#) and 9.4E + 7 (#), respectively. The filter's integrated reduction rate was 41.65% for nanoparticle. For Taishan cigarette, 35.4% and 41.7% of raw emitted nanoparticles were deposited in the oral cavity and lungs, respectively, the rest of 22.9% was exhaled to surrounding air. The corresponding values were 25.6%, 41.5% and 32.9%, respectively, for Hongtaishan. The current findings are expected to provide basic assessments of filter effect and harm to human and to be a warning for smokers.
本研究从吸烟过程中纳米颗粒数量的角度，调查了过滤器对纳米颗粒的过滤效果以及纳米颗粒在人体呼吸系统中的沉积行为。为此，设计了两种实验。一种是机器实验，设计了一个可控的模拟呼吸系统，以测量原始排放物和过滤器的效果。另一种是人体实验，要求志愿者分别将烟吸入口腔和肺部，以区分吸烟路径。结果表明，泰山和红河两种香烟的有效吸入纳米颗粒数量分别为 5.8E+9（#）和 9.4E+7（#）。过滤器对纳米颗粒的综合减排率为 41.65%。对于泰山香烟，原始排放的纳米颗粒中有 35.4%和 41.7%分别沉积在口腔和肺部，其余 22.9%则被呼出到周围空气中。对于红河香烟，相应的值分别为 25.6%、41.5%和 32.9%。本研究结果有望为评估过滤器效果和对人体的危害提供基础，并对吸烟者发出警示。
