ISSN : 1738-4125(Print)
ISSN : 2287-7509(Online)
ISSN : 2287-7509(Online)
The Secondary Products by Ozone-initiated Reaction with Terpenes Emitted from Natural Paint
Received 13 July 2004, accepted 4 September 2004
Abstract
The use of natural paint for the application to walls and furnishings is now increasing to improve indoorair quality, thereby the natural paint could be a significant source of biogenic volatile organic compounds(BVOCs) in indoor environments. Recent studies have shown that gas-phase reactions between terpenes andozone can generate sub-micron size particles and toxic volatile organic compounds such as aldehydes andketones. In this research, we have studied the formation of particles and secondary organic compoundsduring the reaction of ozone with terpenes emitted from commercial natural paint. The paint applied ontostainless steel was dried and oxidized in a teflon chamber. Two monoterpenes (α- and β-pinenes) wereidentified by FTIR and GC/MS. Several tests were performed to evaluate the effects of ozone concentrationon particle formation. Increased ozone levels significantly affect the increase of particle numberconcentration (monitored with SMPS), which results in the increase of particle counts ranging from 8,000 to70,000 particles/㎤. Gas-phase products such as formaldehyde, acetaldehyde, acetone + acrolein, andpropionaldehyde were identified during the terpene/ozone reactions by HPLC. These compounds arepotential hazardous chemical compounds having harmful health effects to animals and plants. The resultsobtained from this study provide an insight on the adverse effect of eco-friendly natural product on indoorair quality (IAQ).
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