광양만 인근 산단 주변 하천의 퇴적물 오염도 평가

윤형선 ( Hyung-sun Yoon ),서성규 ( Seong-gyu Seo ) 한국환경기술학회 2007 한국환경기술학회지 Vol.8 No.1

광양만 인근의 산업단지가 밀집한 주요 하천 최종하류부분에서, 해역으로 유입되기 전의 퇴적물 오염도를 평가하기 위한 지표로서 일반항목인 강열감량, 화학적산소요구량, 황화수소, 함수율 및 입도분석을 조사 하였다. 함수율의 평균은 1차 41.7%, 2차 39.5%로 조사되었으며, 강열감량의 평균은 1차 5.6%, 2차 4.9%로 조사되어 전반적으로 1차 조사에서 높게 나타나 계절적 영향이 크게 작용한 것으로 판단된다. 화학적산소요구량의 평균은 1차 8.7mg/dry-g, 2차 6.3mg/dry-g으로 조사되었으며, 황화수소의 평균은 1차 0.428mg/dry-g, 2차 0.130mg/dry-g으로 조사되었다. 퇴적물의 입도분포 현황으로 Sand 평균은 1차 25.2%, 2차 28.1%로 조사되었고, Silt 평균은 1차 18.3%, 2차 22.4%로 조사되었으며, Mud 평균은 1차 56.5%, 2차 49.5%로 조사되었다. 항목별 결정계수(R²)의 값은 강열감량과 화학적산소요구량의 경우가 높은 결정계수를 갖는 것으로 확인되었다. 일반적인 퇴적물의 지표항목별 분석결과를 통해 전반적인 퇴적물 오염도 분포 경향은 여수산단 주변하천(R-1, R-2) > 광양제철 주변하천(R-3) > 초남산단 주변하천(R-4) 순서로 나타났다. 5년간의 광양만 해역의 강열감량, 화학적산소요구량, 황화수소의 농도와 비교한 결과, 산업단지가 밀집된 주변하천의 유기물 오염원이 해역 퇴적물 오염에 일부 영향을 주고 있음을 간접적으로 알 수 있었다. In this study, We analyze the general items as volatile solids(VS), COD, H₂S, water content and particle distribution in order to investigate of tributary streams which are distributed around the industrial complex and the sediment pollution by the industrial complex poured into the bottom of Gwangyang Bay, In case of the percentage of water content, the average values are 41.7% and 39.5% in the first and second research while the average values of the VS are 5.6% and 4.9%. It appeared generally highly from first investigation and the seasonal factor has a large effect on the results. In case of the COD, the average values are 8.7mg/dry-g and 6.3mg/dry-g in the first and second research while the average values of H₂S are 0.428mg/dry-g and 0.13mg/dry-g. For the particle distribution, the respective average values of sand, silt and mud in the first and second research are 25.2% and 28.1, 18.3% and 22.4%, 56.5% and 49.5%. It is confirmed that the coefficient of determination constant(R₂) values of VS and COD are higher than any others. From the general items of sediment analysis results, the trend of sediment pollution distribution is in the following order: The stream around Yeosu Industrial complex(R-1, R-2) > the stream around Gwangyang steelworks(R-3) > the river around Chonam Industrial complex(R-4). For comparing the concentrations of VS, COD and H2S at Gwangyang Bay during the 5 years, we can indirectly see that the industrial complex take some effect on the sediment pollution of dense tributary stream around Gwangyang Bay.

니켈을 함유한 콜타르 피치 결합제를 이용한 미생물연료전지 산화전극 성능개선

윤형선(Hyung Sun Yoon),송영채(Young Chae Song),최태선(Tae Seon Choi) 大韓環境工學會 2015 대한환경공학회지 Vol.37 No.9

팽창흑연과 탄소나노튜브를 이용한 산화전극을 CTP에 Ni을 혼합한 결합제로 제작하였으며, 산화전극에 CTP와 Ni을 혼합한 결합제와 Nafion 결합제를 대조구로 미생물연료전지의 성능에 미치는 영향을 회분식 실험을 통하여 조사하였다. 산화전극 제작에 사용된 CTP 양이 적을수록, Ni 함량이 증가할수록 산화전극 표면에 부착성장한 미생물량이 증가하였으며, 내부저항이 감소하였다. CTP 4 g과 Ni 0.2 g을 혼합한 결합제로 제작한 산화전극의 경우 최대전력밀도는 738.11 mW/m2, 내부저항은 146.19 Ω이다. 대조구인 Nafion결합제로 제작한 산화전극와 비교하여 최대전력밀도는 23.68% 컸으며, 내부저항은 33.82% 낮았다. 따라서, CTP와 Ni을 혼합한 물질은 저렴하고 효율이 높은 미생물연료전지의 산화전극결합제로서 좋은 대안이 될 수 있다. The composite anodes of expanded graphite (EG) and multiwall carbon nanotube (MWCNT) for microbial fuel cells were fabricated by using coal tar pitch (CTP) binder containing nickel (Ni), and the effect of the anodes with the binders on the performance of the MFCs were examined in a batch reactor. During the start-up of the MFCs, quick increase in voltage was observed after a short lag phase time, indicating that the CTP binder is biocompatible. The biomass attatched on the anode surface was more at higher Ni content in the binder, as well as at smaller amount of CTP binder for the fabrication of the anode. The internal resistance of the MFC was smaller for the anode with more biomass. Based on the results, the ideal combination of CTP and Ni for the CTP binder for anode was 2 g and 0.2 g, respectively. The maximum power density was 731.8 mW/m2, which was higher 23.7% than the anode with Nafion binder as control. The CTP binder containing Ni for the fabrication of anode is a good alternative in terms of performance and economics of MFCs.

3D 프린팅 기술과 미래식품산업의 응용

윤형선(Hyung-Sun Yoon),이미현(Mihyun Lee),김현연(Xuanyan Jin),김수진,이소윤(Soyeon Lee),김연비,유영선(Young-Sun You),이진규(Jin-Kyu Rhee) 한국식품과학회 2016 식품과학과 산업 Vol.49 No.4

The potentialities of 3D printing technology are discussed from technical and research-oriented perspectives for industrial manufacturing of a variety of food products. Currently, 3D printing technology has advanced to enable us to process or cook innovative foods. However, food-based materials for 3D printing are still limited in terms of eating qualities, nutritional values and functionality as well as industrial production. Therefore, this uprising issue on alternative food processing techniques especially focused on the exploration of new food materials combined with these 3D printing technologies needs to be re-spotlighted, and then solved to pave the way to this innovative and sensational area of investigation with more accessibility. In this review, previous research work and industrial applications conducted by frontier research groups in this field are covered, then to open discussion for future research on the 3D printing of food.

망간산화물 촉매를 이용한 악취제거

서성규(Seong-Gyu Seo),윤형선(Hyung-Sun Yoon),마충곤(Zhong-Kun Ma),류의(Yi Liu) 한국대기환경학회 2010 한국대기환경학회지 Vol.26 No.4

고혈압(高血壓) 뇌졸중(腦卒中) 환자(患者)에 대한 사혈(瀉血)의 강압효과(降壓效果)

문장혁,안호진,정동화,윤형선,장재원,김경선,문익렬,백종엽,이상무,Mon, Jang-hyuk,Ahn, Ho-jin,Jeong, Dong-hwa,Yoon, Hyung-sun,Jang, Jae-won,Kim, Kyung-sun,Moon, Ik-ryoul,Baek, Jong-yeob,Lee, Sang-moo 대한침구의학회 2003 대한침구의학회지 Vol.20 No.2

Objective : The aim of this research was to investigate the depressive effect of depletion of B15(心兪), B23(腎兪), L5(尺澤), B40(委中) in hypertentive stroke patients. Methods : Depletion on B15(心兪), B23(腎兪), L5(尺澤), B40(委中) in hypertentive stroke patient who were admitted in Dong-Seo Oriental Medical Hospital every other day form 4 weeks, without western antihypertensive drug. Results : After treatment in 2nd week, depletion on B15(心兪), B23(腎兪), L5(尺澤), B40(委中) without western antihypertensive drug increased the systolic and diastolic blood pressure. After treatment in 4th week, depletion on B15(心兪), B23(腎兪), L5(尺澤), B40(委中) without western antihypertensive drug decreased the systolic and diastolic blood pressure. After treatment in 4th week, values of RBC and hemoglobine were not significantly changed. Conclusions : Continous depletion on B15(心兪), B23(腎兪), L5(尺澤), B40(委中) in hypertentive stroke patient without western antihypertensive drug implies decreasement of blood pressure, without change of values of RBC and hemoglobine.

생활폐기물 소각시 운전 조건에 따른 배출가스 저감 특성

최석주 ( Seok-ju Choe ),윤형선 ( Hyung-sun Yoon ),서성규 ( Seong-gyu Seo ) 한국환경기술학회 2018 한국환경기술학회지 Vol.19 No.3

본 연구에서는 열분해 소각시설에 대하여 운전 조건에 따른 배출가스 특성을 파악하였다. 소각대상은 생활폐기물로써 폐기물의 삼성분은 수분 33.8 %, 가연분 55.6 %, 회분 10.6 %이며, 소각온도는 약 1,000 ℃, 산소 농도는 약 12 %에서 최적의 연소 조건으로 나타났다. 선택적비촉매환원법(SNCR)의 요소수 분사 공정에서 NOx의 경우 1,000 ℃에서 최대 효율을 나타내었고 1,100℃ 이상에서 Thermal NOx의 발생으로 농도가 급격하게 증가하였다. 최적 연소 조건(1,000 ℃, 12 %)에서 대기오염 방지시설 전·후의 배출 농도 분석 결과, 제거효율은 Dust(96.4 %), NOx(60.1 %), SOx(67.3 %), CO(38.8 %), NH₃(46.7 %), HCl(66.7 %)로 나타났다. This study, the characteristics of emission gas according to the operating conditions of pyrolysis incinerator were analyzed. The incinerator was the municipal waste. The wastes were 33.8 % moisture, 55.6 % combustible and 10.6 % ash, and the incineration temperature was about 1,000 ℃ and the oxygen concentration was about 12 %. In the urea water injection process of the SNCR(Selective Non-Catalytic Reduction) process, NOx showed maximum efficiency at 1,000 ℃, and the concentration increased rapidly due to the generation of thermal NOx at above 1,100 ℃. The removal efficiencies of Dust (96.4 %), NOx (60.1 %), SOx (67.3 %) and CO (38.8 %) were measured before and after the air pollution prevention facilities in the optimal combustion condition (1,000 ℃, 12 % NH3 (46.7 %) and HCl (66.7 %).

Co-PC 촉매의 열적 특성과 VOCs 제거 효과

서성규 ( Seong-gyu Seo ),윤형선 ( Hyung-sun Yoon ) 한국환경기술학회 2004 한국환경기술학회지 Vol.5 No.2

코발트-프탈로시아닌(Co-PC) 촉매의 열적 특성은 TGA, FTIR 및 XRD분석을 통하여 수행하였으며, VOCs(메탄올, 아세트알데히드)처리에 관한 연구는 상압유통식 반응장치를 이용하여 조사하였다. TGA분석 결과 Co-PC촉매는 450℃에서 약 85.0%의 중량감소를 나타내었으며, 450℃에서 열처리된 촉매는 메탄올과 아세트알데히드 산화반응시 높은 활성을 나타내었다. 450℃에서 열처리된 Co-PC 촉매상에서 메탄올과 아세트알데히드는 각각 320℃와 350℃이상에서 완전산화 되었으며, 열처리온도에 대한 촉매활성은 800℃<600℃<450℃순서로 나타났다. Co-PC촉매는 상업용 Co₃O₄ 산화물보다 높은 활성을 나타내었으며, FTIR 및 XRD분석결과, 열처리된 Co-PC는 금속산화물인 Co₃O₄형태로 존재함을 확인 할 수 있었다. Thermal characteristics of cobalt-phthalocyanine(Co-PC) catalyst have been studied by TGA, FTIR, XRD analysis. The catalytic oxidation of VOCs(methanol, acetaldehyde) has been investigated in a fixed bed flow reactor at atmospheric pressure. TGA thermogram for Co-PC catalyst showed about 85.0% mass loss at 450℃ and the catalyst with heat-treated at 450℃ showed the highest activity for methanol and acetaldehyde oxidation. The complete oxidation of methanol and acetaldehyde over Co-PC catalyst with heat-treated at 450℃ was observed above 320℃ and 350℃ respectively. The catalytic activity with heat-treatment temperatures improved in the order of 800℃<600℃<450℃. The catalytic activity of Co-PC is better than the commercial Co₃O₄. FTIR and XRD results showed that Co-PC catalyst with heat-treated at 45 0℃ was destroyed and metal oxide were formed such as Co₃O₄. This cobalt metal oxide(Co₃O₄) has high catalytic activity on methanol and acetaldehyde oxidation.

메탄올 연소에 대한 구리 프탈로시아닌 촉매의 전처리효과

서성규(Seong Gyu Seo),윤형선(Hyung Sun Yoon),김상채(Sang Chai Kim) 大韓環境工學會 1999 대한환경공학회지 Vol.21 No.11

석유화학 NCC 공정의 부생수소 가스 정제용 PSA 흡착제 특성

정채훈 ( Chae-Hoon Chung ),윤형선 ( Hyung-sun Yoon ),서성규 ( Seong-gyu Seo ) 한국환경기술학회 2021 한국환경기술학회지 Vol.22 No.4

In this study, four types of adsorbents for PSA process suitable for the purification of low-purity by-product hydrogen gas generated in the petrochemical NCC process were selected and their characteristics were reviewed by performing SEM-EDS, XRD, and BET analysis. SEM-EDS analysis showed that P1 was an organic C component, P2 was Si, Al, Ca, Na component, P3 was Si component, and P4 was Al component. In particular, in the case of P2, a Si/Al ratio of 1.2, a Na/Al ratio of 0.20, and a Ca/Al ratio of 0.32 were detected. For XRD analysis, P1 is amorphous and graphite, P2 is a mixture of zeolite 10X and 13X, P3 is amorphous silica gel, and P4 is a typical Al₂O₃ crystal structure. BET synthesis analysis of adsorbents showed that P1 had the most well-developed micropores and P2, P3, and P4 had larger mesopore volumes.

흰넓적다리붉은쥐 유래 한타바이러스 분리 및 분자생물학적 특성 비교

송기준(Ki Joon Song),윤형선(Hyung Sun Yoon),고은영(Eun Young Ko),정기모(Gee Mo Jung),박광숙(Gwang Sook Park),이용주(Yong Joo Lee),송진원(Jin Won Song),백락주(Rak Joo Baek) 대한바이러스학회 2000 Journal of Bacteriology and Virology Vol.30 No.1

Two distinct hantaviruses have been isolated from Apodemus agrarius in 1976 and Rattus norvegicus in 1980 in Korea. Since our serosurveys conducted in 1994, a genetically distinct hantavirus from Apodemus peninsulae has been investigated. To isolate hantavirus from A. peninsulae captured in Korea, the lung homogenate of seropositive A. peninsulae inoculated Vero E6 cells. Viral antigen was detected in a progressively higher percentage of cells with subsequent passage after 80 days postinoculation. The new isolate from seropositive Apodemus peninsulae was designated Suchong virus after Suchong valley located in northeastern region of South Korea. Comparing with hantaan virus 76-118 strain, Suchong virus-1, 2, 3 and 4 showed the similarity of 71.0-91.8% at nucleotide and 90.9-94.8% at amino acid sequences in 231 nucleotides region of M segment, and the similarity of 75.1-81.0% at nucleotide and 97.5-100% at amino acid sequences in 237 nucleotides of S segment.