Reaction of monoterpene hydrocarbons with O(3), SO(2) and NO(2) : formation of acidic compounds
Monoterpenes are the principal volatiles emitted in large quantities by conifers. They appear to play a significant role in growth regulation, insect attraction, disease resistance and human allergies. Because of their chemical nature, mostly unsaturated hydrocarbons, monoterpenes react very rapidly with atmospheric constituents e.g. O(3), OH-radicals (rate constants of the reactions of most terpenes with O(3) range from 1.0 E3 to 1.0 E6 l/mol.sec, with OH-radicals from 1.0 E10 to 14 x 1.0 E10 l/mol.sec) and may form various oxidation products partly as aerosols. In the framework of investigations of the role of monoterpene hydrocarbons in the dry deposition of atmospheric pollutants (e.g.O(3), SO(2), NO(x) ) are studied the gas-phase reactions of selected monoterpenes with ozone in the presence of SO(2) (beta-pinene) as well as in the presence of SO(2)/NO(2) (alpha-pinene, beta-pinene and limonene). Emphasis is given to identifying the main reaction products and to quantifying the sulphuric acid aerosol formed.
Bibliographic Reference: Paper presented: 5th European Symposium on Physico-Chemical Behaviour of Atmospheric Pollutants, Varese (IT), Sept. 25-28, 1989
Availability: Available from (1) as Paper EN 35028 ORA
Record Number: 198911136 / Last updated on: 1994-12-01
Original language: en
Available languages: en