Open AccessCriteria pollutant impacts of volatile chemical products informed by near-field modelling
Author(s) -
Momei Qin,
Benjamin N. Murphy,
Kristin Isaacs,
Brian McDonald,
Qingyi Lu,
S. A. McKeen,
Lauren E. Koval,
Allen L. Robinson,
Christos Efstathiou,
Chris Allen,
Havala O. T. Pye
Publication year - 2020
Publication title -
nature sustainability
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.514
H-Index - 37
ISSN - 2398-9629
DOI - 10.1038/s41893-020-00614-1
Subject(s) - pollutant , environmental science , ozone , environmental chemistry , hazardous waste , particulates , volatile organic compound , hazardous air pollutants , atmosphere (unit) , reactivity (psychology) , environmental engineering , chemistry , waste management , meteorology , engineering , organic chemistry , medicine , physics , alternative medicine , pathology
Consumer, industrial, and commercial product usage is a source of exposure to potentially hazardous chemicals. In addition, cleaning agents, personal care products, coatings, and other volatile chemical products (VCPs), evaporate and react in the atmosphere producing secondary pollutants. Here, we show high air emissions from VCP usage (≥ 14 kg person -1 yr -1 , at least 1.7× higher than current operational estimates) are supported by multiple estimation methods and constraints imposed by ambient levels of ozone, hydroxyl radical (OH) reactivity, and the organic component of fine particulate matter (PM 2.5 ) in Pasadena, California. A near-field model, which estimates human chemical exposure during or in the vicinity of product use, indicates these high air emissions are consistent with organic product usage up to ~75 kg person -1 yr -1 , and inhalation of consumer products could be a non-negligible exposure pathway. After constraining the PM 2.5 yield to 5% by mass, VCPs produce ~41% of the photochemical organic PM 2.5 (1.1 ± 0.3 μ g m -3 ) and ~17% of maximum daily 8-hr average ozone (9 ± 2 ppb) in summer Los Angeles. Therefore, both toxicity and ambient criteria pollutant formation should be considered when organic substituents are developed for VCPs in pursuit of safer and sustainable products and cleaner air.