충남지역 수질관리 현황 및 대책

한국환경보건학회 한국환경보건학회 2001 한국환경보건학회 학술대회 자료집 Vol.2001 No.-

쓰레기 처리 문제 및 개선방안

한국환경보건학회 한국환경보건학회 2001 한국환경보건학회 학술대회 자료집 Vol.2001 No.-

b-시클로덱스트린(b-Cyclodextrin)과 톨루엔(toluene) 결합특성에 관한 연구

최종규,조경덕 한국환경보건학회 2003 한국환경보건학회지 Vol.29 No.5

Surfactants, such as -cyclodextrin (-CD), have frequently been used to desorb hydrophobic organic compounds (HOCs) from the soil and to enhance the bioavailability of HOCs. This study was performed to investigate the binding characteristics between toluene and -CD with batch experiment and the column study. The results showed that -CD formed an efficient complex with toluene. As the -CD concentration increased, the amount of toluene complexed with the -CD rapidly increased, up to 40% of the initially added concentration at equilibrium. The effect of -CD on the desorption of toluene from the soil in a water/soil system showed that as the -CD concentration increased, the amount of toluene desorbed into the water increased up to 100% of their initial toluene concentrations. In the column experiment, toluene was effectively transported through the column in the presence of -CD without sorption or retardation.

일부 한국 성인 여성들의 혈중 내분비계 장애물질 농도 및 그 노출요인의 연구

민선영, 정문호 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.2

영산강 하류부의 목표수질 달성을 위한 BOD 부하량 삭감방법의 비교

황대호, 정효준, 이홍근 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.2

The key point in establishing water quality management measures is how to decide the load reduction for pollution sources. This study was performed to compare reduction methods for BOD loadings to achieve water quality standards at the end of the Yeongsan river. The target year is 2006 and 2011 and reduction methods are uniform treatment and treatment by influence rate. Using QUAL2E model, the study was performed under the conditions of establishing and non-establishing the publicly owned treatment works(POTWs). Uniform treatment which allocate the same reduction rate to pollution sources showed that all streams into the river should be applied for the reduction. However, treatment by influence rate which allocate the reduction rate by the order of influence rate showed that achieving target quality might be possible with a few streams for the reduction. But total amount of load reduction of streams was not significantly different from two methods.

Brachydanio rerio(zebrafish)를 이용한 IBP, methidathion 및 piperophos의 생물농축성

하영득, 민경진, 이승곤 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.2

This study was performed to investigate the bioconcentration of IBP, methidathion and piperophos. The BCFs(bioconcentration factor), depuration rate constants for three pesticides in zebrafish(Brachydanio rerio) were measured by OECD guideline 305. The concentration of test pesicides were one-hundredth and one-thousandth concentration of 96-hrs L C50in accordance with OECD guideline 305. The results obtained are summarized as follows: The average BCF values of IBP were 5.31(n=4) and 7.30(n=4) at one-hundredth and one-thousandth concentration of 96-hrs L C50. The average BCF values of methidathion were 8.72(n=4) and 11.25(n=4), the average BCF values of piperophos were 34.30(n=4) and 42.60(n=4). Depuration rate constants of IBP were 0.09( h^-1) and 0.08( h^-1), half-life of IBP were 7.70 and 8.66 at each tested concentration. The concentrations of IBP in zebrafish at low and high concentrations rapidly decreased after 12(0.243㎍/g) and 12 hours(0.040㎍/g). Depuration rate constants of methidathion were 0.40( h^-1), half-life of methidathion were 1.73 at one-hunderdth and of 96-hrs L c50, repectively. The concentrations of methidathion in zebrafish at high concentrations rapidly decreased after 6 hours(0.18㎍/g). Depuration rate constant of low concentration was no measured because methidathion in zebrafish was depurated in 6 hours. Depuration rate constants of piperophos sere 0.15( h-1) and 0.44( h-1), half-life of piperophos were 4.62 and 1.58 at each tested concentration. The concentrations of piperophos in zebrafish at los and high concentrations rapidly decreased after 12(0.26㎍/g) and 6 hours(0.015㎍/g). It was suggested that high BCF of piperophos was due to high Kow(octanol-water partition coefficient). The possibility of bioconcenration was not likely to be high because of its KDEP(depuration rate constant) in the evniroment. It was suggested that low BCF of methidathion showed lowest Kow as well as the most rapid KDEP. Therefore, the possibility of bioconcentration was not occured in the enviroment. It was suggested that the BCF dtermined for IBP was lower than that of other pesticides due to high Sw(water solubility), show KDEP. Therefore, IBP revealed little bioconcentration effect on in aquatic ecosystem.ystem.

GIS 기법을 활용한 대기오염관리에 관한 연구(I)-서울시 VOCs 오염도를 중심으로

박기학, 조성준, 유영대 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.2

On the planning for the systematic management and control of the air pollution display methods were used to evaluate the spatial pollutant concentration status. This study were conducted to investigate the practical using of Geographic Information System(GIS) technology on the air pollution control and management which were computer-based systems that were used to store and manipulate geographic information in the macro city. In this study 137 samples were corrected by passive samplers and analysed by GC/MSD for 16 VOCs in Seoul (25 distincts) distributed by TM-coordinate(2 kmX2km), and finally displayed by Arciew program(version 3.2, ESRI Inc, USA) for windows. The concentration of benzene and toluene showed high level in whole area of seoul area of Seoul and distribution of butylbenzen, trothroloetylene, stylen showed high level in whole area of Seoul except a few distincts and the distribution of isopropylbenzene, 1,2-dichroloethane showed higher level in core area than that of Kangnam and Kangbuk area. In conclusion, products of this study of using GIS technology apply on the spatial distribution of VOCs concentration was very effective than that of other methods(e.g., contouring concentration method, pie or column chart, graduated symbols), especially in mapping and symbolization of pollution status evaluation.

Xylene 대사 효소 활성에 미치는 주.야 시차의 영향

이혜자, 윤종국 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.2

To evaluate an effect of circadian variation on the xylene metabolizing enzyme activities, 50% m-xylene in olive oil(0.25 mℓ/100g body weight) was intraperitoneally administered to the rats every other day for 6 days both in the night; 24:00 and the day; 12:00. Then animals were sacrigiced at 8hr after last injection of m-xylene. Hepatic microsomal cytochrome p450 contents were more increased both in control and xylene treated rats of night phase than those of day phase. But the activity of hepatic alcohol dehydrogenase(ADH) in control of night phase showed the similar value with that in those of day phase and xylene treated rats of day phase showed an increasing tendency of hepatic ADH activity as those of night phase showing similar activity. Furthermore, control rats of night phase than those of day phase. And by xylene treatment, enzyme activities of rats of day phase were higher tendency in rats of control but those of night phase were somewhat inhibited. Besides, xylene-treated animals of night phase showed increasing tendency of urinary methylhippuric acid concentration compared with those of day phase. On the other hand, liver weight per body weight(%), hepatic lipid peroxide content and serum xanthine oxidase activity were higher in night phase. And the activities of hepatic oxygen free radical metabolizing enzymes such as xanthine oxidase, gluthathione S-transferase, and xylene-treated rats of night phase than those of day phase. In conclusion, it can be hypothesized on the basis of the results that the accumulation rate of m-xylene intermediate metabolite, i.e. m-methylbenzaldehyde in liver tissus may be higher in night phase than in day phase and it may be responsible for higher liver toxicity in bight phase than in day phase.

생활환경과 실내공기의 미생물학적 오염에 관한연구

정윤희, 홍준배, 장윤희 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.2

This study was carried out to investigate the microbial characteristics of the urban air pollution in the subway stations, streets, department stores, wholesale markets, underground shopping centers, buildings, parks, houses and apartments in the Seoul and the suburbs area. Total cell count, total mold count and the presence of opportunistic pathogens(Streptococcus pneumoniae, Klebsiella pneumoniae, Aspergillus spp., Penicillium spp.) were evaluated determine the microbial air quality. Total cell count and mold count of indoor air in the houses and apartments were 2.9X102-6.3X102 cfu/㎥ and 60-1.8X102cfu/㎥, respectively, and the department stores and wholesale markets had much lower cell count than the houses and apartments. Ground level of commercial stations were 2.6 fold higher than the general subway stations, and Apergillus spp. and Penicillium spp. which could cause the bronchus and lung diseases were detected 17 sampling site out of 45. Dust were collected from the commercial facilities and houses, and total cell and mold count of the dust were 4.3X103-1.7X106 cfu/g and 2.3X103-6.5 X104cfu/g, respectively. Therefore the dust might be one of the main reservoir of microorganims

폐수의 감압 암모니아 탈기에 관한 연구

신대윤, 오유경 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.1

This study aims at finding out pertinent reaction conditions for treating high concentration ammonia contained in N-chemical factory wastewater with decompressed ammonia stripping method that was designed. And it also tries to investigate adsorption capability of removed ammonia to soil. The results from experiments are as follows ; 1. The removal rate of NH3-N of synthetic wastewater was under 85% at pH 10 with decompressed ammonia stripping method. The reaction time in pressure 360 mmHg at pH 11 and 12 was shorter than in 460 mmHg, and the removal rate of NH3-N with decompressed ammonia stripping method at 90℃ was 11~15% higher than air stripping 2. The optimum conditions for decompressed ammonia stripping with synthetic sample were shown as pH 12, temperature 90 ℃, internal reaction pressure 460 mmHg and reaction time 50 minutes. These conditions were applied to treat the wastewater containing organic-N 290.5mg/ℓ, NH3-N 168.9mg/ℓ, NO2-N 23.2mg/ℓ, NO3-N 252.4mg/ℓ, T-N 735mg/ℓ. Organic-N turned out to be removed 60%, the removal rate of NH3-N IS 94%, T-N is 50%. But NO2-N and NO3-N were increased with 7.8% and 14.9% respectively. 3. The CO Dsr removal rate in decompressed ammonia stripping reaction was 42% and S O42-was removed 8.2%. It was turned out caused with higher pH and thermolysis. 4. In soil adsorption of ammonia desorbed from the decompressed stripping process of wastewater, the recovery rate was 76% in wet soil.