Ultrafine particles and black carbon personal exposures in asthmatic and non-asthmatic children at school age

作者：Panella P^*; Casas M; Donaire Gonzalez D; Garcia Esteban R; Robinson O; Valentin A; Gulliver J; Momas I; Nieuwenhuijsen M; Vrijheid M; Sunyer J

来源：Indoor Air, 2017, 27(5): 891-899.

DOI：10.1111/ina.12382

• asthma
• black carbon
• children
• microenvironments
• personal monitoring
• ultrafine particles

Traffic-related air pollution (TRAP) exposure during childhood is associated with asthma; however, the contribution of the different TRAP pollutants in each microenvironment (home, school, transportation, others) in asthmatic and non-asthmatic children is unknown. Daily (24-h) personal black carbon (BC), ultrafine particle (UFP), and alveolar lung-deposited surface area (LDSA) individual exposure measurements were obtained from 100 children (29 past and 21 current asthmatics, 50 non-asthmatics) aged 9 +/- 0.7 years from the INMA-Sabadell cohort (Catalonia, Spain). Time spent in each microenvironment was derived by the geolocation provided by the smartphone and a new spatiotemporal map-matching algorithm. Asthmatics and non-asthmatics spent the same amount of time at home (60% and 61%, respectively), at school (20% and 23%), on transportation (8% and 7%), and in other microenvironments (7% and 5%). The highest concentrations of all TRAPs were attributed to transportation. No differences in TRAP concentrations were found overall or by type of microenvironment between asthmatics and non-asthmatics, nor when considering past and current asthmatics, separately. In conclusion, asthmatic and non-asthmatic children had a similar time-activity pattern and similar average exposures to BC, UFP, and LDSA concentrations. This suggests that interventions should be tailored to general population, rather than to subgroups defined by disease.

• 出版日期2017-9