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DNPH cartridge/LC-MS 방법에 의한 반월ㆍ시화산업단지의 폼알데하이드 분석에 관한 연구
조덕희(Deok-Hee Cho),송일석(Il-Seok Song),김인구(In-Gu Kim),김웅수(Woong-Soo Kim),김종보(Jong-Bo Kim),김태현(Tae-Hyun Kim),황선민(Sun-Min Hwang),남우경(Woo-Kyong Nam) 대한환경위생공학회 2006 대한환경위생공학회지 Vol.21 No.1
Formaldehyde is important because of their irritant and toxic properties, mutagenicity and carcinogenicity. In this study, liquid chromatography-mass spectrometry (LC-MS) is used for the analysis of formaldehyde after derivatization with 2,4-dinitrophenylhydrazine (DNPH) cartridge. Analytical parameters such as linearity, repeatability and minimum detection limit were evaluated. The linearity (r²) was 0.9997 when analyte concentration ranges from 25 to 200 ㎍/ℓ. The relative standard deviation (%RSD) was 1.25 % for concentration of 200 ㎍/ℓ. The minimum detection limit (MDL) was 0.73 ppbv. It was shown that LC-MS method has a great potential for formaldehyde analysis. The results of formaldehyde from the survey of Ban-Woll and Shi-Hwa Industrial Complex samples, the highest level was 6.20, 3.93 ppb, respectively. The highest emission level of formaldehyde at chemical plants in the Ban-WollㆍShi-Hwa Industrial Complex was 5421.25 ppb.
정수처리공정에서 TiO₂광촉매를 이용한 THM전구물질 제거에 관한 연구
조덕희(Deok-Hee Cho),서수만(Su-Man Seo) 대한환경위생공학회 2004 대한환경위생공학회지 Vol.19 No.2
In Bok-Jeong water treatment plant, chlorination is the only technique used for disinfection of drinking water. This disinfecting treatment leads to the formation of trihalomethanes (THMs). This study was carried out to investigate the possibility of improving removal efficiency of THM precursor in the conventional water treatment processes by TiO₂ photocatalytic oxidation. Removal efficiencies of DOC, UV_(254), THMFP were low in the conventional water treatment processes. With application of TiO₂ photocatalyst, DOC, UV_(254), THMFP were reduced more effectively. As the TiO₂ photocatalytic reaction time increased, the removal efficiencies of DOC, UV_(254), THMFP were increased. The TiO₂ photocatalytic removal efficiencies of DOC, UV_(254), THMFP were increased with increasing TiO₂ dosage. However, over 0.6g/ℓ of TiO₂ dosage, the efficiency reached a plateau.