| Title: | Ranking the environmental factors of indoor air quality of metropolitan independent coffee shops by Random Forests model |
| Author(s): | Lin YW; Tang CS; Liu HC; Lee TY; Huang HY; Hsu TA; Chang LT; |
| Address: | "Department of Public Health, Fu Jen Catholic University, New Taipei City, Taiwan. Department of Public Health, Fu Jen Catholic University, New Taipei City, Taiwan. 052340@mail.fju.edu.tw. Department of Labor and Human Resources, Chinese Culture University, Taipei City, Taiwan. Department of Statistics and Information Science, Fu Jen Catholic University, New Taipei City, Taiwan. Department of Environmental Engineering and Science, Feng Chia University, Taichung City, Taiwan" |
| DOI: | 10.1038/s41598-022-20421-2 |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "Independent coffee shops are the alternative workplaces for people working remotely from traditional offices but are not concerned about their indoor air quality (IAQ). This study aimed to rank the environmental factors in affecting the IAQ by Random Forests (RFs) models. The indoor environments and human activities of participated independent coffee shops were observed and recorded for 3 consecutive days including weekdays and weekend during the business hours. The multi-sized particulate matter (PM), particle-bound polycyclic aromatic hydrocarbons (p-PAHs), total volatile organic compounds (TVOCs), CO, CO(2), temperature and relative humidity were monitored. RFs models ranked the environmental factors. More than 20% of the 15-min average concentrations of PM(10), PM(2.5), and CO(2) exceeded the World Health Organization guidelines. Occupant density affected TVOCs, p-PAHs and CO(2) concentrations directly. Tobacco smoking dominated PM(10), PM(2.5), TVOCs and p-PAHs concentrations mostly. CO concentration was affected by roasting bean first and tobacco smoking secondly. The non-linear relationships between temperature and these pollutants illustrated the relative low concentrations happened at temperature between 22 and 24 degrees C. Tobacco smoking, roasting beans and occupant density are the observable activities to alert the IAQ change. Decreasing CO(2) and optimizing the room temperature could also be the surrogate parameters to assure the IAQ" |
| Keywords: | "*Air Pollutants/analysis *Air Pollution, Indoor/analysis Carbon Dioxide/analysis Environmental Monitoring Humans Particulate Matter/analysis *Polycyclic Aromatic Hydrocarbons/analysis *Volatile Organic Compounds/analysis;" |
| Notes: | "MedlineLin, Yu-Wen Tang, Chin-Sheng Liu, Hsi-Chen Lee, Tzu-Ying Huang, Hsiao-Yun Hsu, Tzu-An Chang, Li-Te eng Research Support, Non-U.S. Gov't England 2022/09/27 Sci Rep. 2022 Sep 26; 12(1):16057. doi: 10.1038/s41598-022-20421-2" |
