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홍성희 ( Sung Hee Hong ),한개희 ( Gae Hee Han ),이찬형 ( Chan Hyung Lee ),이순화 ( Shun Hwa Lee ) 한국물환경학회 2002 한국물환경학회지 Vol.18 No.5
Phthalate esters in the Nakdong river and the Kumho river was measured using GC/MS-SIM. Sample was treated by SPE method. The concentrations of phthalate esters in the midstream of Nakdong river was measured in the range of N.D∼10.28 ㎍/ℓ. The detection frequency was DBP>DEHP>DEP>BBP and it was higher than studies of MOE and Japan. The concentrations of phthalate esters in the Kumho river and the Nakdong river were higher than those of other river in Korea. There was high correlation between the concentration of DBP, DEHP and precipitation in the Kumho river. DBP, DEHP, DEP and BBP were recoverable above 80 % in SPE method. SPE method showed a good precision and accuracy of phthalate esters with simple operation.
김은경(Eun Kyung Kim),송희봉(Hee Bong Song),박민숙(Min Sook Park),임종기(Jong Ki Lim),권종대(Jong Dae Kwon),최수진(Su Jin Choi),박수경(Su Kyung Park),한개희(Gae Hee Han) 大韓環境工學會 2014 대한환경공학회지 Vol.36 No.7
본 연구는 대구광역시 산단지역 대기 중의 휘발성유기화합물 특성을 조사하였다. 산단지역은 비산단지역에 비해 톨루엔, 에틸벤젠, m,p-자일렌, o-자일렌 순으로 높은 농도차를 보였고, 벤젠과 클로로포름은 지역별로 뚜렷한 농도차가 없었다. 측정계절별로는 산단지역은 하고동저형을 보였다. 특히 화학물질 사용 영향으로 인해 산단지역은 측정요일별로는 평일이 휴일에 비해 높게 나타났고, 측정시간대별로는 가동시간을 포함한 오전, 오후 시간대가 상대적으로 높게 나타났다. VOCs 물질간의 상관성은 산단지역이 비산단지역에 비해 유의한 상관이 많았고, 기상인자와는 풍속이 VOCs와 음의 상관을 보였다. This study was carried out to characterize the ambient VOCs concentrations of industrial complex in Daegu city. VOCs concentrations of industrial complex area appeared to be higher than those in the non-industrial complex area as following order toluene > ethylbenzene > m,p-xylenes > o-xylene but benzene and chloroform were similar to each other sites. There was seasonal variation of VOCs concentrations in the industrial complex area, higher in summer and lower in winter. In particular the industrial complex area shows that higher on weekday than weekend and higher in the daytime than in the morning or nighttime because industrial complex area influenced by the chemicals. Correlation coefficients among VOCs were confirmed that VOCs of industrial complex area were more related to each other than those of non-industrial complex area and VOCs concentrations have shown generally negative correlation with wind speed.
고체상 추출법을 이용한 Phthalate Esters의 분석방법 연구
홍성희,한개희,이찬형,이순화 한국환경과학회 2003 한국환경과학회지 Vol.12 No.1
The study was carried out to evaluate the new analytical method of phthalate esters(diethyphthalate, di-n-butylphthalate, butylbenzylphthalate, bis(2-ethylhexyl)phthalate), one of the endocrine disruptors, which were performed by GC/MS-SIM(seleted ion monitoring). The phthalate esters were extracted from water samples using solid-phase extraction on C_18 columns. It investigated that the extraction recovert rate of phthalate esters with different solvents and solvent volume. The optimal solvent was dichloromethane and proper volume of dichloromethane for recovert of phthalate esters was 4 mL. There were good linearities(above R^2=0.9975) in the range 0.01∼0.50㎎/L,and the detection limits were below 0.01∼0.03㎍/L.The recovert rates,RSD and MDLs for phthalate esters were 80∼114%,5.0∼8.1% and 0.03∼0.11㎍/L,respectively. This method shows a good precision of phthalate esters.
민경섭,송희봉,박연준,한개희,이명숙,김용혜,홍성희,권기홍 한국환경과학회 1997 한국환경과학회지 Vol.6 No.1
We investigated and analysed the actual conditions and characteristics of railroad noise levels for 17 sites in the vicinity of the Seoul-Pusan Line. The results are summarized. as follows : 1) Railroad noise level ranged to 64∼74 L_eq dB(A) at day time and ranged to 60∼72 L_eq dB(A) at night time. 2) Increased night noise level depend on the increase of trains passing at night time. 3) The major factor of increased noise level in the vicinity of stations are using loudspeakers and stream whistle on trains. 4) Decreased effect of noise according to distance is able to be described quantitatively using regression equations of multiplicative model. L_eq=78.59 X^-0.056 n=25, r=-0.994, s.e.=1.007 P_av =105.68X^-0073, n =25, r =-0.997, s.e. = 1.007 Also increased and decreased effect of noise according to floor in apartment is able to be described quantitatively using regression equations of multiplicative model. L_eq = 64.238 X^0.0567, n = 39, r = 0.787, s. e. = 1.004 P_av. = 79.963 X^0.0254 n = 39, r = 0.689, s. e. = 1.056 5) Average noise level in high floor is over 70L_eq dB(A) at day and night time, so more detailed soundproofing countermeasured in high floors apartment is required.