Usefulness of a Technique Based on Negative Corona Discharge for the Degradation of Selected, Condensed PAHs: Application to the Oxidation of Anthracene and Similar Structures

Authors : D TESSIER, C OGUIC, J PINART

Pages : 157-164

View : 14 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The usefulness of negative corona discharge for oxidation of condensed polycyclic aromatic hydrocarbons insert ignore into journalissuearticles values(PAHs);, including anthracene, naphthalene and 2,3-benzanthracene, adsorbed on a solid substrate is evaluated. In the case of anthracene, the application of corona discharge under high voltage insert ignore into journalissuearticles values(10-20 kV); for 10 to 180 min with a current intensity of 5-120 m A in a controlled, humid atmosphere leads to the progressive formation of anthraquinone. A kinetic study of the anthracene oxidation shows that the apparent half-lives range from 5 to 48 min, according to the initial anthracene amount insert ignore into journalissuearticles values(50-5000 nmol);, indicating a reaction order between 0 and 1. The effect of corona discharge current intensity and the role of corona discharge-produced high-speed electrical wind insert ignore into journalissuearticles values( \approx 10 m/s); are discussed. The efficiency of the solid-phase corona discharge method is found to depend on the adsorption strength of the PAH molecules on the solid substrate and/or their capacity to be sublimated under the influence of electrical wind. Key Word: PAHs; anthracene; naphthalene; 2,3-benzathracene; corona discharge; oxidation.
Keywords : Turk J Chem, 25, 2001, 157 164 Turk J Chem, vol 25, iss 2