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RISS 인기검색어
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- 저자 : Churl Seung Lee (검색결과 106 건)
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이경화,김정섭,유현철,최성우,윤철종,우성훈,박승조 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1
Adsorption equilibrium of heavy metals ion on the peat moss was confirmed Frundlich isotherm Removal efficiency of heavy metals ion was increased from pH 2 to 10 and heavy metal removal efficiency was increased in the sequence of Cu(Ⅱ) > Pb(Ⅱ) > Cd(Ⅱ) > Mn(Ⅱ) on the PM(Peat Moss). The PM is likely to be more effective adsorption than the PAC to removal of metal ions in the solution, since PM's weakly acidic functional groups which is not founded on the PAC, in addition to its high surface area and porosity. But, the PM is not separated from the solution water by sedimentation process. So, a liquid and solid seperation between the PM and the solution water could be considered for the PM's field application. But peat moss was low cost adsorbent. Thus author propose to adopt PM as a adsorbent for heavy metal removal.
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최성우,이봉섭,곽명화,윤철종,박승조 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2
Chromium occurs naturally in the earth's crust as well as in air, surface, and ground water. However, chromium is released to the environment in much larger amounts as a result of human activities. Hexavalent chromium, Cr(Ⅵ), is very soluble in water in natural environment and very toxic, carcinogenic, and mutagenic in animal and man. On the other hand trivalent chromium, Cr(Ⅲ), is less toxic and less soluble and thus is a lesser problem. This study has been carried out in order to reduce toxicity of Cr(Ⅵ) by an Escherichia coli strain. After adding E. Coli., the results were obtained from concentration of total Cr, Cr(Ⅵ). Cr(Ⅲ), pH, turbidity, and VSS in aerobic condition was summarized as follows : After 48hr aerobic condition in experiment of synthetic wastewater, the reduction rate of Cr(Ⅵ) was 20%. Also, the reduction rate of Cr(Ⅵ) was 60% in experiment of raw wastewater.
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유현철,김정섭,곽명화,윤철종,이희인,박승조 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1
Problems of wastes that pigs produce are increasing rapidly in the hog raising industry nowadays. consequently, the generation volume of excreta also is increasing but most of that is not disposed appropriately and exposed in eco-system therefore the disposal of stock excreta is becoming more and more serious. considering the physical and chemical characteristics of livestock excreta, the pollution loading rate - BOD, COD etc. - is very high. as alternative plan, that is, as one method kind of composisting, the utilization of the soil reformation agent will become one solution in managing the upper problems. also, the flyash of 3.7 million tons are producing every year and about 32.2% of that, 1.18 million ton is recycled as concrete, cement, cementassistance, road etc. consequently, the discharged flyash is not abandoned and a plan of recycling is needed acutely. gypsum of 4.16 million tons in 1998 presently was produced and about 57.2% of that, 2.38 million tons was recycled as cement, construction materials. the present stock is 25 million tons. therefore, in this study, because organic materials can be obtained in pig excreta and calciums can be obtained in gypsum, the small amount of elements can be acquired in flyash for the soil reformation agents, mixing the three materials - pig excreta, gypsum, flyash - adequately, investigated technique of making the soil reformation agents and described below in comparrision with the changes of temperature, PH TOC, T-N, TOC/T-N ratio etc.
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Lee, Seung-Mi,Choi, In-sun,Han, Euna,Suh, David,Shin, Eun-Kyung,Je, Seyunghe,Lee, Sung Su,Suh, Dong-Churl Wiley (John WileySons) 2018 Obesity Vol.26 No.1
<P>ConclusionsAmong patients with diabetes who were less than 65 years of age, patients with diabetes and obesity have significantly higher treatment costs than patients with diabetes and normal weight. The economic burden of diabetes to society will continue to increase unless more proactive preventive measures are taken to effectively treat patients with overweight or obesity.</P>
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Wangiella dermatitidis에 의한 Phaeomycotic Subcutaneous Abscess 1증례
이승철(Seung Churl Lee),전인기(Inn Ki Chun),김영표(Young Pio Kim) 대한피부과학회 1986 대한피부과학회지 Vol.24 No.5
We present here a case of phaeornycotic subcutaneous abscess caused by Wangiella dermatitidis in a 34-year-old male, who had multiple asymptomatic subcutaneous masses of 7 months duration over the neck and right axilla. ]n this case, we could observe typical gross colony morphology of W. dermatitidis. which showed creamy greyish, yeast-like colony with aerial mycelia after 3 to 4 weeks. ]n histopathologic study, we found mixed cell granuloma and fungal structure in biopsy specimen. We comfirmed W. dermatitidis by exoantigen test, and treated the subcutaneous lesions by surgical excision and ketoconazole with good result. This case is the first reported in Korea.
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