Characteristics of peak concentrations of black carbon encountered by elementary school children

The Science of the Total Environment
Hyeran Jeong, Donguk Park

Abstract

The objectives of this study were to examine characteristics of peak concentrations, including frequency, duration, and relative magnitude, and estimate its contributions to overall daily exposure to BC by activity and microenvironment. We assessed daily personal exposures from August 2015 to January 2016 (75.2% of weekdays and 24.8% of weekend days; 64.1% of school days and 35.9% of holidays) among forty 10-12 years old children living in the Seoul metropolitan area. These children were equipped with a microaethalometer (BC monitor) and recorded a time-activity diary. Pre-administrated questionnaires and follow-up interviews also provided information on children's time-activity patterns. Owing to the absence of a generally accepted threshold, peaks were alternatively defined as BC concentrations higher TWA, the 95th percentile, and the 99th percentile. Peak concentrations made substantial contributions to total daily exposure to BC (peaks ≥ TWA: 60%, peaks ≥95th-percentile: 19%, and peaks ≥99th-percentile: 6%). Average peak levels higher than TWA and the 95th percentile differed significantly by activity and ME. Transportation and cooking led to frequent peak occurrences which disproportionately contributed to daily integrated...Continue Reading

Citations

Dec 4, 2020·The Science of the Total Environment·Patricia KreclGabriel Yoshikazu Oukawa
Feb 2, 2021·Environmental Research·Stephanie OsborneSani Dimitroulopoulou
Feb 24, 2021·Environmental Pollution·Admir Créso TarginoDavid Andrés Monroy
Sep 9, 2021·Environmental Health Perspectives·Kyung Hwa JungStephanie Lovinsky-Desir

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