Ozone Initiates Human-Derived Emission of Nanocluster Aerosols
Artikel i vetenskaplig tidskrift, 2021

Nanocluster aerosols (NCAs, particles <3 nm) are important players in driving climate feedbacks and processes that impact human health. This study reports, for the first time, NCA formation when gas-phase ozone reacts with human surfaces. In an occupied climate-controlled chamber, we detected NCA only when ozone was present. NCA emissions were dependent on clothing coverage, occupant age, air temperature, and humidity. Ozone-initiated chemistry with human skin lipids (particularly their primary surface reaction products) is the key mechanism driving NCA emissions, as evidenced by positive correlations with squalene in human skin wipe samples and known gaseous products from ozonolysis of skin lipids. Oxidation by OH radicals, autoxidation reactions, and human-emitted NH3 may also play a role in NCA formation. Such chemical processes are anticipated to generate aerosols of the smallest size (1.18-1.55 nm), whereas larger clusters result from subsequent growth of the smaller aerosols. This study shows that whenever we encounter ozone indoors, where we spend most of our lives, NCAs will be produced in the air around us.

indoor air

particle formation

molecular clusters

human skin lipids

ozone chemistry

Författare

Shen Yang

Ecole Polytechnique Federale de Lausanne (EPFL)

Dusan Licina

Ecole Polytechnique Federale de Lausanne (EPFL)

Charles J. Weschler

Rutgers University

Danmarks Tekniske Universitet (DTU)

Nijing Wang

Max-Planck-Gesellschaft

Nora Zannoni

Max-Planck-Gesellschaft

Mengze Li

Max-Planck-Gesellschaft

Joonas Vanhanen

Airmodus Oy

Sarka Langer

IVL Svenska Miljöinstitutet

Chalmers, Arkitektur och samhällsbyggnadsteknik, Installationsteknik

Pawel Wargocki

Danmarks Tekniske Universitet (DTU)

Jonathan Williams

Max-Planck-Gesellschaft

Cyprus Institute

G. Beko

Danmarks Tekniske Universitet (DTU)

Environmental Science & Technology

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

Vol. In Press

Ämneskategorier

Meteorologi och atmosfärforskning

Kemiska processer

Annan medicinsk grundvetenskap

DOI

10.1021/acs.est.1c03379

PubMed

34672572

Mer information

Senast uppdaterat

2021-11-18