γ 선을 이용한 페놀 분해 메카니즘

정영도; 윤정효; 오영순; 이면주; Young Do Jeong; Jeong Hyo Yoon; Young Soon Oh; Myun Joo Lee

Journal of the Korean Industrial and Engineering Chemistry, Vol.11, No.6, 586-590, October, 2000

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γ 선을 이용한 페놀 분해 메카니즘

The Mechanisms of Phenol Decomposition by γ-ray

정영도^†, 윤정효, 오영순¹, 이면주

한국원자력연구소, 대전 305-353
¹충북대학교 환경공학과, 충북 360-763

Young Do Jeong^†, Jeong Hyo Yoon, Young Soon Oh¹, and Myun Joo Lee

korea Atomic Energy Research Institute, Taejon 305-353, Korea
¹Department of Environemtnal Engineeirng, Chungbuk National University, Chungbuk 360-763, Korea

E-mail:

초록

γ선은 페놀을 분해시키는 처리방법 중의 하나이고, 이를 중심으로 바이알(반응기)에 오존 및 TiO2를 첨가하여 각각에 대한 페놀분해 실험을 하였다(γ선, γ선/O3, γ선/O3/TiO2). 페놀분해의 부산물은 3가지 처리방법에 의해 동일하게 hydroquinone, pyrocatechol, fumaric acid, maleric acid, malic acid, oxalic acid, formic acid 등이 검출되었다. 페놀분해 메카니즘은 거의 동일하게 hydroquinone과 pyrocatechol에서 더욱 산화되어 malic acid, oxalic acid, formic acid로 되었다. 그러나 페놀분해 부산물의 농도는 처리방법에 따라 차이가 있었다. γ선에 오존과 TiO2를 첨가하지 않았을 때의 hydroquinone과 pyrocatechol 농도가 높았고, 같은 γ선 조사량에서 오존을 첨가하였을 때와 오존과 TiO2를 동시에 첨가하였을 때의 hydroquinone과 pyrocatechol 농도가 낮았다.

The decomposition of phenol was performed with γ-irradiation under three different experimental conditions : γ-ray only, γ-ray with ozone(γ/O3), and γ-ray with ozone and TiO2 (γ/O3/TiO2). The pathway of the decomposition was investigated by identifying the radiolytic products of phenol. The identified products were virtually identical irrespective of the experimental conditions used in this work, however, the yield of individual products was different. Phenol was firstly decomposed to hydroquinone and pyrocatechol by the reaction of hydroxyl radicals, and it then further oxidized into fumaric acid, maleric acid, malic acid, oxalic acid, formic acid. Compared with the result of γ-ray irradiation alone, the yield of hydroquinone and pyrocathechol decreased in the presence of either ozone or TiO2, of both.

Keywords:Phenol;Mechanism;γ-ray;O3;TiO2

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[1] Stein G, Weiss J, J. Chem. Soc., 3265 (1951)

[2] Sakurai K, Koekuka J, Koyama M, Yoshida H, preprint presented at the 32nd Meeing of the Chemical Society, Japan, 871 (1975)

[3] Hashimoto S, Miyata T, Washino M, Kawakami W, Environ. Sci. Technol., 13, 71 (1979)

[4] Hashimoto S, Miyata T, Kawakami W, Radiat. Phys. Chem., 16, 59 (1980)

[5] Okamoto K, Yamamoto Y, Tanaka H, Tanaka M, Itaya A, Bull. Chem. Soc. Jpn., 58, 2015 (1985)

[6] Getoff N, "Radiation Processing of Liquid and Solid Industrial Waste," IAEA-SM-325/167 (1992)

[7] "Applied Radiation Chemistry: Radiation Processing," Jone Wiley & Sons, Inc., 166 (1994)

[8] Anbar M, Bambenek M, Ross AB, Natl. Stand. Ref. Data Ser. Natl. Bur. Stand., 43 (1973)

[9] Buxton GV, Greenstock CL, Helman WP, Ross AB, J. Phys. Chem. Ref. Data, 17(2), 513 (1988)

[10] Field RJ, Raghavan NV, Brummer JG, J. Phys. Chem., 86, 2443 (1982)

[11] Rruno L, David AR, Deborah RB, "Ozone in Water Treatment," Lewis Publisher, 13 (1991)