| Title: | Effect of residential air cleaning interventions on risk of cancer associated with indoor semi-volatile organic compounds: a comprehensive simulation study |
| Address: | "School of Architecture and Urban Planning, Nanjing University, Nanjing, Jiangsu, China; Department of Building Science, School of Architecture, Tsinghua University, Beijing, China; Nicholas School of the Environment and Duke Global Health Institute, Duke University, Durham, NC, USA. Department of Building Science, School of Architecture, Tsinghua University, Beijing, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Tsinghua University, Beijing, China. Electronic address: binzhao@tsinghua.edu.cn. Nicholas School of the Environment and Duke Global Health Institute, Duke University, Durham, NC, USA; Duke Kunshan University, Kunshan, Jiangsu, China" |
| DOI: | 10.1016/S2542-5196(18)30236-5 |
| ISSN/ISBN: | 2542-5196 (Electronic) 2542-5196 (Linking) |
| Abstract: | "BACKGROUND: Human exposure to multiphase semi-volatile organic compounds (SVOCs) via multiple routes has been associated with health risks. Residential air cleaning interventions remove SVOCs adsorbed on airborne particles, which subsequently affects indoor concentrations of SVOCs in other phases. We aimed to investigate the effect of residential air cleaning interventions on the overall cancer risk associated with multiphase SVOCs. METHODS: We simulated concentrations of eight multiphase SVOCs (including seven polycyclic aromatic hydrocarbons [PAHs] and di(2-ethylhexyl) phthalate [DEHP]) using a kinetic partition mass balance model for three exposure scenarios: naturally ventilated residences without intervention (scenario 1), naturally ventilated residences with portable air purifiers (scenario 2), and mechanically ventilated residences with air filtration units (scenario 3). We converted indoor concentrations of the individual PAHs into indoor concentrations of equivalent benzo[a]pyrene (BaP(eq)) using the BaP cancer potency equivalent factor for each PAH. We estimated indoor exposure to SVOCs via inhalation, dermal absorption, and ingestion. For each scenario, we calculated the incremental lifetime cancer risk (ILCR) associated with indoor exposure to each SVOC via the three routes and the total ILCR (all three routes combined). FINDINGS: Mean total ILCRs associated with exposure to BaP(eq) were 4.42 x 10(-6) (SD 2.84) for scenario 1, 2.36 x 10(-6) (1.53) for scenario 2, and 4.88 x 10(-6) (4.86) for scenario 3. Mean total ILCRs associated with exposure to DEHP were 3.61 x 10(-6) (3.60) for scenario 1, 7.51 x 10(-7) (5.34) for scenario 2, and 1.48 x 10(-5) (2.02) for scenario 3. Ingestion of settled dust was the most important contributor to the total ILCR for both BaP(eq) and DEHP in all the studied scenarios. INTERPRETATION: The large-scale use of mechanical ventilation systems in urban residences in China needs to be evaluated owing to their potential exacerbation of the cancer risks associated with common indoor SVOCs. FUNDING: National Key Project of the Ministry of Science and Technology and Natural Science Foundation of China" |
| Keywords: | "Adult *Air Filters Air Pollutants/adverse effects/*analysis Air Pollution, Indoor/adverse effects/analysis/*prevention & control Computer Simulation Diethylhexyl Phthalate/adverse effects/*analysis Dust Eating Environmental Exposure/adverse effects/analys;" |
| Notes: | "MedlineShi, Shanshan Zhao, Bin Zhang, Junfeng Jim eng Research Support, Non-U.S. Gov't Netherlands 2018/12/12 Lancet Planet Health. 2018 Dec; 2(12):e532-e539. doi: 10.1016/S2542-5196(18)30236-5" |
