Effect of Ozone, Clothing, Temperature, and Humidity on the Total OH Reactivity Emitted from Humans
Artikel i vetenskaplig tidskrift, 2021

People influence indoor air chemistry through their chemical emissions via breath and skin. Previous studies showed that direct measurement of total OH reactivity of human emissions matched that calculated from parallel measurements of volatile organic compounds (VOCs) from breath, skin, and the whole body. In this study, we determined, with direct measurements from two independent groups of four adult volunteers, the effect of indoor temperature and humidity, clothing coverage (amount of exposed skin), and indoor ozone concentration on the total OH reactivity of gaseous human emissions. The results show that the measured concentrations of VOCs and ammonia adequately account for the measured total OH reactivity. The total OH reactivity of human emissions was primarily affected by ozone reactions with organic skin-oil constituents and increased with exposed skin surface, higher temperature, and higher humidity. Humans emitted a comparable total mixing ratio of VOCs and ammonia at elevated temperature-low humidity and elevated temperature-high humidity, with relatively low diversity in chemical classes. In contrast, the total OH reactivity increased with higher temperature and higher humidity, with a larger diversity in chemical classes compared to the total mixing ratio. Ozone present, carbonyl compounds were the dominant reactive compounds in all of the reported conditions.

indoor chemistry

ozone deposition velocity

volatile organic compounds

indoor ozone

human skin emissions


Nora Zannoni


Mengze Li


Nijing Wang


Lisa Ernle


G. Beko

Danmarks Tekniske Universitet (DTU)

Pawel Wargocki

Danmarks Tekniske Universitet (DTU)

Sarka Langer

IVL Svenska Miljöinstitutet

Chalmers, Arkitektur och samhällsbyggnadsteknik, Installationsteknik

Charles J. Weschler

Danmarks Tekniske Universitet (DTU)

Rutgers University

Glenn Morrison

The University of North Carolina System

Jonathan Williams


Environmental Science & Technology

0013-936X (ISSN) 1520-5851 (eISSN)

Vol. 55 20 13614-13624 01831


Oorganisk kemi

Meteorologi och atmosfärforskning






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