Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Май 13, 2025

Tobacco smoke, a complex mixture of particulate matter (PM) and gaseous pollutants, poses serious health risks remains significant challenge for indoor air purification. Photocatalytic oxidation (PCO) technology has emerged as an effective strategy pollutant removal, but its application in real tobacco smoke purification associated impacts underexplored. Herein, we investigated the simultaneous removal PM volatile organic compounds (VOCs) from using PCO purifier. The purifier exhibited superior achieving 99% efficiency within 10 min reducing ultrafine concentrations to one-tenth those observed with high (HEPA) filtration. 63 main VOCs, predominantly oxygenated were identified exhibiting over 300 min. Furthermore, demonstrated exceptional stability long-term durability across varying humidity levels concentrations. hazard index (HI) was quantified evaluate smoke. reduced HI by 95% 120 min, demonstrating effectiveness mitigating exposure risks. Additionally, major primarily established four key indicator (i.e., 2,5-dimethylfuran, 2,3-butanedione, n-nitrosomethylethylamine, isocyanic acid), which reliably estimated overall during study provides promising multiple pollutants environment along convenient method assessing impacts.

Язык: Английский