Each four polycyclic aromatic hydrocarbons (PAHs) was reacted with OH radical at 1.5 Å distance by CAChe MOPAC 2000 program. These results were compared to those reported experimental results. Reaction positions of all four PAHs corresponded with predicted positions in which ⊿E(HOMO-LUMO) was approximately 4.7. Finally oxygen of OH radical combined with PAH and quinone form of products were produced. These results indicate that the proposed determining the ⊿E(HOMO-LUMO) can be effectively applied to predict reaction position of recalcitrant compounds such as dioxins, PCBs, POPs, and etc.

Abstract
 1. 서 론
 2. 자료 및 방법
 3. 결과 및 고찰
 4. 결 론
 참 고 문 헌

• 이병대(위덕대학교 보건학과) | Byung-Dae Lee (Department of Health, Uiduk University) Corresponding Author