title: Ozone reaction with clothing and its initiated VOC emissions in an environmental chamber.
abstract: Human health is adversely affected by ozone and the volatile organic compounds (VOCs) produced from its reactions in the indoor environment. Hence, it is important to characterize the ozone-initiated reactive chemistry under indoor conditions and study the influence of different factors on these reactions. This investigation studied the ozone reactions with clothing through a series of experiments conducted in an environmental chamber under various conditions. The study found that the ozone reactions with a soiled (human-worn) T-shirt consumed ozone and generated VOCs. The ozone removal rate and deposition velocity for the T-shirt increased with the increasing soiling level and air change rate, decreased at high ozone concentrations, and were relatively unaffected by the humidity. The deposition velocity for the soiled T-shirt ranged from 0.15 to 0.29 cm/s. The ozone-initiated VOC emissions included C6-C10 straight-chain saturated aldehydes, acetone, and 4-OPA (4-oxopentanal). The VOC emissions were generally higher at higher ozone, humidity, soiling of T-shirt, and air change rate. The total molar yield was approximately 0.5 in most cases, which means that for every two moles of ozone removed by the T-shirt surface, one mole of VOCs was produced.
authors.affiliation: School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA.
authors.forename: A C
authors.initials: AC
authors.lastname: Rai
authors.forename: B
authors.initials: B
authors.lastname: Guo
authors.forename: C-H
authors.initials: CH
authors.lastname: Lin
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Pei
authors.forename: Q
authors.initials: Q
authors.lastname: Chen
mesh_terms: D000328:Adult; D000393:Air Pollutants / Q000737:chemistry*; D003020:Clothing; D006801:Humans; D008297:Male; D010126:Ozone / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D055549:Volatile Organic Compounds; D010126:Ozone
keywords: Air quality; Environmental factors; Ozone; Secondary emissions; Skin oil; Surface reactions; Volatile organic compounds