광화학적 방법을 이용한 휘발성 방향족 화합물의 분해

김종향

Clean Technology, Vol.4, No.1, 35-44, June, 1998

Export Citation

광화학적 방법을 이용한 휘발성 방향족 화합물의 분해

Decomposition of volatile aromatic compounds by photochemical treatment

김종향

초록

휘발성 유기화합물(벤젠, 톨루엔, 에틸벤젠, 크실렌)의 광분해를 단순 UV조사와 TiO₂ 광촉매하의 UV조사를 이용하여 연구하였고 또한 여러 가지 반응조건에 따른 분해효율에 대해 고찰하였다. 광분해반응기는 중압 수은램프가 부착된 석영 annular 반응기를 이용하였다. UV조사에 의한 휘발성유기화합물의 분해정도는 톨루엔 92%≥ 에틸벤젠 92%> 벤젠 83% > 크실렌 82% 였고, TiO₂ 광촉매하의 UV조사를 이용한 유기물의 분해정도는 톨루엔 92% > 크실렌 82% > 에틸벤젠 80% > 벤젠 53% 였다. 반응물의 분석은 Purge & Trap 농축기를 이용하여 FID가 부착된 GC로 분석하였고, GC-MS로 반응물의 중간생성물을 확인하였다.

Photodecomposition behaviors of volatile organic compounds (VOCs ; benzene, toluene, ethylbenzene and xylenes) over UV irradiation and UV irradiation with TiO₂ powder catalyst were studied and the extent of degradation were also investigated under various reaction conditions. The reactions were conducted in a quartz annular reactor equipped with a medium pressure mercury lamp. As a result, the extents of degradation were 92% for toluene and ethylbenzene, 83% for benzene, and 82% for xylenes under UV irradiation. And they were 92% for toluene, 82% for xylene and ethylbenzene, and 53% for benzene under UV irradiation with TiO₂ powder. Analyses of reacted samples by FID-gas chromatograph ith Purge & Trap concentrator and GC-MS indicated that the aromatics formed many intermediates.

[References]

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[1] Collahan M, Water-Related Environmental Fate of 129 Priority Pollutants, EPA-440/479-029, USEPA Washington D.C. (1979)

[2] 정용, 수질보전학회, 5(1), 57 (1989)

[3] 환경처: 팔당호시험 준엽 영향조사 보고서 (1994)

[4] Sundstrom DW, Weir BA, Kiei HE, Environ. Prog., 8(1), 6 (1989)

[5] Kawai T, Ceramics, 21(4), 326 (1986)

[6] Terzian R, Sepone N, Minero C, Pelizzetti E, J. Catal., 128, 352 (1991)

[7] Okamoto K, Yamamoto Y, Bull. Chem. Soc. Jpn., 58, 2023 (1985)

[8] Kim SJ, Moon JU, J. KSSE, 19(3), 391 (1997)

[9] Min BC, Kim JH, Kim BK, J. Korean Ind. Eng. Chem., 8(3), 502 (1997)

[10] Legrini O, Oliveros E, Braun AM, Chem. Rev., 93, 671 (1993)

[11] Serpone N, Pelizzetti E, Photocatalysis - Fundaments and Applications, John Wiley & Sons, Inc., New York, pp. 1-7 (1989)

[12] Puma GL, Yue PL, "Photodegradation of Pentachlorophenol," Photocatalytic Purification and Treatment of Water and Air, D.F. Ollis and H.Al-Ekabi (Ed.), Elsevier Science Publishers, B.V. pp. 689 (1993)

[13] Horspool WM, Aspects of Organic Photochemistry, Academic Press, Inc., New York, pp. 124 (1976)

[14] Sarakha M, Dauphin G, Chemosphere, 18(7-8), 1391 (1989)

[15] Castrantas HM, Gibilisco RD, ACS Symp. Ser., 422, 77 (1990)