Impact of ultrafine particles released by electroniccigarettes on indoor environment
Objective To understand the impact of smoke released by electronic cigarettes on indoor environment.Methods The concentrations of particulate matter and volatile organic compounds(VOCs)released during indoor electronic cigarette smoking were determined,and used numerical models to evaluate the deposition of ultrafine particles(PM0.1)of different sizes in the human respiratory tract.Results The experimental results showed that a large amount of PM0.1was generated during the electronic cigarette smoking process,with a maximum concentration of 1.52×1011 units/m3,which was 21.6 times of the indoor background concentration.Half an hour after the suction was completed,the concentration of PM0.1 remained 8 times higher than the indoor background value.The calculation results of the human respiratory sedimentation model indicated that these ultrafine particles could deposit in large quantities in the human alveoli.Conclusion Indoor electronic cigarette smoking may significantly increase the concentration of PM0.1 in indoor air.It is necessary to strengthen the management of electronic cigarette use,especially in public indoor environments.
Ultrafine particlesElectronic cigarettesRespiratory depositionParticle size distribution
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