전자빔 공정에서 H₂O₂와 Fe 3+ -EDTA의 첨가가 수산화라디칼 생성에 미치는 영향

This study focuses both on the quantitative measurement of hydroxyl radicals formed by an electron beam (E-beam) process and on the decomposition of pentachlorophenol(PCP) in the presence of H₂O₂ and Fe 3+ -EDTA as additives. To attain this objective, the quantitative measurement of hydroxyl radical was performed with the hydroylation of benzoic acid (BA), producing hydroxybenzoic acid (OHBA). As a result, the concentrations of hydroxyl radical measured were lower than those of hydroxyl radical predicted. Probably, it indicates that the reactive species generated during E-beam irradiation are able to scavenge the hydroxyl radicals. In particular, the degradation of PCP was promoted by the addition of H₂O₂ ( 1mM), and thus carbon yield(%) of oxalic acid as a by-product was increased. During E-beam irradiation the addition of Fe 3+ -EDTA effectively decomposed the PCP, thus increasing the G-values. Considering the formation of OHBA and the decomposition of PCP, these results suggest that the addition of Fe 3+ -EDTA in the E-beam process can produce the further hydroxyl radicals and enhance the efficiency of PCP decomposition at low dose.