새만금 간척지 지역 미세먼지 특성

홍성창 ( Hong Sung-chang ),김민욱 ( Kim Min-wook ),김진호 ( Kim Jin-ho ) 한국환경농학회 2021 한국환경농학회 학술대회집 Vol.2021 No.-

The Jeonbuk region is an area with high concentration of particulate matter. Due to environmental changes in the Saemangeum reclaimed land with an area of 219 ㎢, it is necessary to evaluate the impact of the particulate matter in the Jeonbuk region. Particulate matter was measured from June in 2020, the Jangjado island the westernmost region, was set as the background concentration, and three measurement station were installed around the Saemangeum reclaimed land area. In addition, the concentration of particulate matter and air pollutants were measured by installing an intensive air quality measurement station in the Kehwa rice experiment station nearby Saemangeum reclaimed land. The concentrations of PM10 and PM2.5 were highest in the order of Gimje, Buan, Gunsan, and Jangjado(background concentration) area in June. However, it has changed seasonally. The total suspended particle(TSP) was high in Gimje and Buan, where compartment and leveling work are actively underway. The concentration of PM10, PM2.5, NO₂, SO₄, O₃ were measured lower than that of the urban air quality monitoring station located in the nearby area. It was needed that longer-term air quality monitoring was necessary for accurate impact assessment.

시설잎들깨 재배의 퇴비 시용에 의한 암모니아 배출량

홍성창 ( Sung-chang Hong ),김진호 ( Jin-ho Kim ),김민욱 ( Min-wook Kim ) 한국환경농학회 2021 한국환경농학회지 Vol.40 No.3

BACKGROUND: Concerns have been raised about the impact of recent high concentrations of fine dust on human health. Ammonia(NH3) reacts with sulfur oxides and nitrogen compounds in the atmosphere to form ultrafine ammonium sulfate and ammonium nitrate (PM2.5). There is a growing need for accurate estimates of the amount of ammonia emitted during agricultural production. Therefore, in this study, ammonia emissions generated from the cultivation of leafy perilla in plastic houses were determined. METHODS AND RESULTS: Cow manure compost, swine manure compost, and poultry manure compost each at 34.6 ton ha-1, the amount commonly used by farmers in the field, was sprayed on the soil surface. Just after spraying cow manure compost, swine manure compost, and poultry manure compost, the ammonia was periodically measured and analyzed to be 22.5 kg ha^-1, 22.8 kg ha^-1, and 85.2 kg ha^-1, respectively. The emission factors were estimated at 70.0 kg-NH₃ ton-N, 62.8 kg-NH₃ ton-N, and 234.1 kg-NH₃ ton-N, respectively. Most ammonia was released in the two weeks after application of the compost and then the amount released gradually decreased. CONCLUSION: Therefore, it is necessary to improve the emission factor through a study on the estimation of ammonia emission by type of livestock manure and major farming types such as rice fields and uplands, and to update data on the production, distribution, and sales of livestock manure.

이산화티탄과 UV-B 수준에 따른 벼 생육과 프로테옴 해석

홍성창,신평균,장안철,이기상,이철원,우선희,Hong, Seung-Chang,Shin, Pyung-Gyun,Chang, An-Cheol,Lee, Ki-Sang,Lee, Chul-Won,Woo, Sun-Hee 한국작물학회 2007 한국작물학회지 Vol.52 No.1

태양광과 반응하여 독특한 광화학적 작용을 하는 이산화티탄($TiO_2$)을 벼 잎 표면에 처리하였을 때 벼 엽신의 광합성 대사에 대한 영향을 검토하고 프로테옴 분석을 통해 생리변화를 구명하고자 수행한 결과를 요약하면 다음과 같다. 1. 광합성유효파장이 $2,400\;{\mu}mol\;m^{-2}\;s^{-1}$과 $2,200\;{\mu}mol\;m^{-2}\;s^{-1}$ 배치구에서 이산화티탄 10, 20 ppm 처리는 광적응상태의 엽록소형광지수(Yield)를 낮추었고 $450\;{\mu}mol\;m^{-2}\;s^{-1}$ 처리구는 엽록소형광지수를 높였다. 2. 노지조건인 PAR $2,400\;{\mu}mol\;m^{-2}\;s^{-1}$ 배치구에서 광합성 명반응의 상대전자전달율은 이산화티탄 10 ppm 처리에서 평균 45 %, 무처리 32.4 %, diuron 10 ppm 처리구에서 15.3%로 이산화티탄 처리는 광합성 명반응의 상대전자전달율을 높였다. 3. UV-B 4.9, $0.6\;KJ\;m^{-2}\;day^{-1}$ 배치구에서 이산화티탄 처리로 초장이 증가하였고 UV-B $0.15\;KJ\;m^{-2}\;day^{-1}$ 배치구에서 초장은 증가하고 건물중은 감소하였다. 4. 광합성은 노지의 UV-B 조건인 $13.6\;KJ\;m^{-2}\;day^{-1}$ 배치구에서 이산화티탄 처리로 종가하였고 UV-B 4.9, 0.6, $0.15\;KJ\;m^{-2}\;day^{-1}$ 배치구는 다소 증가하였으나 통계적으로 유의한 차이는 나타내지 않았다. 5. 이산화티탄 처리 후 자연광 중의 UV-B를 99% 차단하여 저수준으로 조절한 결과 68%의 단백질 발현이 감소하였고 각각 16%의 단백질 발현이 증가 또는 신생 합성되었다. 6. 이산화티탄 20 ppm 처리 후 자연광 중의 UV-B를 99% 차단시켰을 때 주로 광합성 Calvin cycle에서 $CO_2$ 결합을 촉매하는 결정구조 Rubisco의 chain E 발현이 감소하였다. Among the photoactive semiconductors such as $TiO_2,\;ZnO,\;Fe_2O_3,\;WO_3,\;and\;CdSe,\;TiO_2$ is the most widely used as photocatalyst in different media, because of its lack of toxicity and stability. In this study, the effects of titanium dioxide were investigated to obtain the information of physiological change in rice plant. Light-adapted Chlorophyll flourescence index decreased and relative electron transport rate of rice leaves was activated by titanium dioxide under $2,400\;{\mu}mol\;m^{-2}\;s^{-1}$ PAR (Photosynthetic active radiation). Relative electron transport rate of rice leaf treated with titanium dioxide 10 ppm was high in order of $2,400\;{\mu}mol\;m^{-2}\;s^{-1}\;PAR,\;2,200\;{\mu}mol\;m^{-2}\;s^{-1}\;PAR,\;450\;{\mu}mol\;m^{-2}\;s^{-1}\;PAR$ and titanium dioxide 10 ppm (45.1%), control (32.4%), diuron 10 ppm (15.3%) under $2,400\;{\mu}mol\;m^{-2}\;s^{-1}\;PAR$. Titanium dioxide increased photosynthesis of the rice leaf under $13.6\;KJ\;m^{-2}\;day^{-1}$ UV-B only. With titanium dioxide 20 ppm, reduced UV-B ($0.15\;KJ\;m^{-2}\;day^{-1}$) intensity changed the induction of proteins and twenty-five proteins were identified. Among them, seventy proteins were up-regulated, four proteins were down-regulated and four proteins were newly synthesized. Function of these proteins was related to photosynthesis (52%), carbohydrate metabolism (4%), stress/defense (8%), secondary metabolism (4%), energy/electron transport (4%), and miscellaneous (28%).

석탄 fly ash 의 정전하특성 및 전하분포의 측정

홍성창(Sung Chang Hong),조영민(Young Min Jo) 大韓環境工學會 1996 대한환경공학회지 Vol.18 No.5

경피배액술로 치료한 십이지장 벽내 혈종 1예

권창일 ( Chang Il Kwon ),최기현 ( Ki Hyun Choi ),고은향 ( Eun Hyang Ko ),이지현 ( Ji Hyun Lee ),송영준 ( Young Jun Song ),고광현 ( Kwang Hyun Ko ),홍성표 ( Sung Pyo Hong ),박필원 ( Pil Won Park ) 대한소화기학회 2007 대한소화기학회지 Vol.49 No.1

Complicating intramural hematoma is an interesting, relatively unusual condition. Various etiologic factors have been described, with the most common being blunt trauma, anticoagulant therapy, Henoch-Schonlein purpura and blood dyscrasias. Most intramural hematomas resolve spontaneously with conservative treatment, and the prognosis is good. However, if the abdominal pain or obstruction does not resolve with medical management over seven to ten days, complications such as infarction or peritonitis may occur, and surgical intervention might be required. We report a case of intramural hematoma of duodenum treated with percutaneous drainage and embolization of bleeding focus which was complicated with acute pancreatitis after anticoagulation treatment in a patient with recurrent history of deep vein thrombosis. In addition, we reviewed reports of intramural hematoma of the duodenum and treatment strategies. (Korean J Gastroenterol 2007;49:45-49)

다공성 촉매 분리막을 이용한 수증기 개질 반응 특성 연구

홍성창 ( Sung Chang Hong ),이상문 ( Sang Moon Lee ) 한국공업화학회 2014 공업화학 Vol.25 No.2

본 연구에서는 Ni metal foam 플레이트의 수증기 개질반응 및 표면 특성을 조사하였다. 전처리를 통하여 Ni의 산화상태를 변화시킬 수 있었으며, 활성 site로서 표면에 노출된 metallic Ni 종은 수증기 개질 반응활성에 중요한 역할을 한다. 또한 Ni metal foam 플레이트의 기공제어 및 촉매 기능을 부여하기 위하여 Ni metal foam 플레이트와 Ni-YSZ 촉매를 혼합하여 다공성 촉매 분리막을 제조하였다. SEM 분석 결과 metal foam 플레이트의 기공을 제어할 수 있었으며, 표면에 Ni-YSZ 촉매는 고르게 잘 분포되어 있었다. Ni 기반 다공성 촉매 분리막은 공간속도에 상관없이 상용촉매와 유사한 수증기 개질 활성을 가진다. In this study, steam reforming reaction and surface characteristics of Ni metal foam plate were investigated. Valence state of Ni could be changed by pretreatment, and metallic Ni species exposed on surface as a active site play important role in steam reforming reaction. Porous catalytic membrane also was prepared by mixing of Ni metal foam plate and Ni-YSZ catalyst to control the pore size and assign the catalytic function in Ni metal foam plate. In SEM analysis results, Pore size of Ni metal foam plate could be controlled and Ni-YSZ catalyst well dispersed on surface. Ni based porous catalytic membrane had a similar steam reforming activity regardless of space velocity.

배가스 중 SO₂가 V/TiO₂ SCR활성에 미치는 영향

홍성창,Hong, Sung-Chang 한국공업화학회 2006 공업화학 Vol.17 No.5

$V_{2}O_{5}$/$TiO_{2}$계 선택적촉매환원법(SCR) 촉매는 $SO_{2}$가 존재하는 조건에서 $SO_{2}$의 산화 및 암모니아의 반응에 의해 형성된 황산암모늄염으로 인해 촉매는 비활성화될 수 있다. 본 연구에 의하면, $SO_{2}$에 의한 촉매의 비활성화는 $SO_{2}$의 흡착이후 $SO_{3}$로의 산화 정도에 의존한다. $SO_{2}$의 산화는 배가스 내의 산소 농도에 약하게 영향을 받으며 바나듐 함량에 영향을 받는다. 또한 미반응 암모니아 역시 황산암모늄염 형성의 원인이므로 SCR 반응에 있어서 암모니아 투입비율에 대한 영향을 도출하였다. 황산암모늄염에 의해 비활성화된 촉매가 낮은 SCR 활성을 갖는 이유를 촉매의 기공부피 변화에서 찾을 수 있다. 이러한 황산암모늄염의 분해 반응도출을 위해 TPD (Temperature Programmed Decomposition) 실험이 수행되었다. $V_{2}O_{5}$/$TiO_{2}$ catalyst can be deactivated by ammonium salts formed by $SO_{2}$ oxidation and unreacted ammonium in presence of $SO_{2}$ in flue gas. The deactivation of catalyst by $SO_{2}$ depends on the $SO_{2}$ oxidation to $SO_{3}$. The oxidation of $SO_{2}$ is weakly affected by oxygen concentration, and strongly by the amount of vanadium loaded onto titania supports. Because unreacted ammonia is one of elements to form the ammonium salts, it is important to control the mole ratio of $NH_{3}/NOx$ in SCR. Thus the experiments about $NH_{3}/NOx$ were carried out. The reason of low activity of catalyst deactivated by ammonium salts is the change of pore volume. And TPD (Temperature Programmed Decomposition) was performed to find the decomposition of ammonium bisulfate on deactivated catalyst.

벼 광합성과 수량에 미치는 TiO2 처리 효과

홍성창 ( Seung Chang Hong ),신평균 ( Pyung Gyun Shin ),장안철 ( An Cheol Chang ),김상효 ( Sang Hyo Kim ),이기상 ( Ki Sang Lee ),이철원 ( Chui Won Lee ) 한국토양비료학회 2006 한국토양비료학회 학술발표회 Vol.2006 No.-

새만금 간척지 지역 대기 암모니아 농도

홍성창 ( Hong Sung-chang ),김민욱 ( Kim Min-wook ),김진호 ( Kim Jin-ho ) 한국환경농학회 2021 한국환경농학회 학술대회집 Vol.2021 No.-

The Jeonbuk region has a higher concentration of particulate matter than the national average. The Saemangeum reclaimed land is located across Gunsan, Gimje, and Buan-gun. Therefore, it is necessary to evaluate the impact of the Saemangeum reclaimed land on the air quality in the Jeonbuk region. Atmospheric ammonia concentrations were measured from June 2020 to February 2021 using a passive sampler. In winter, the ammonia concentration was highest in the order of Buan, Gimje, Gunsan, and Jangjado island(background concentration). The concentration was 13 to 16 ppb and the background concentration was 10 ppb. In summer, Gimje, Buan, Gunsan, and Jangjado were highest in order. The concentration was 14 to 17ppb and the background concentration was 12ppb. Thus, atmospheric ammonia concentrations varied seasonally. The atmospheric NO2 concentrations tended to be higher in Buan, Gimje, Gunsan, and Jangjado in order. But there was a significant difference. As a result of measuring from June to October using CRDS analyzer, it decreased from June to September, which is the summer season, but increased from October. In summer the concentration of ammonia decreases due to the washing effect of rainfall and moisture, but it is necessary to evaluate the absorption of ammonia in the atmosphere by the crop cultivation.

CaCO₃ 를 함유한 폐제지슬러지를 이용한 SO₂ 의 배출제어

홍성창(Sung Chang Hong),김상범(Sang Bum Kim),김영훈(Young Hun Kim) 大韓環境工學會 1996 대한환경공학회지 Vol.18 No.3