http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Selective and Regenerative Carbon Dioxide Capture by Highly Polarizing Porous Carbon Nitride
오영탁 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Energy efficient CO<sub>2</sub> capture is a stringent demand for green and sustainable energy supply. Strong adsorption is desirable for high capacity and selective capture at ambient condition, but unfavorable for regeneration of adsorbents by simple pressure control process. Here we present highly regenerative and selective CO<sub>2</sub> capture by carbon nitrides functionalized porous reduced graphene oxide aerogel surface. The resultant structure demonstrate large CO<sub>2</sub> adsorption capacity at ambient condition (0.43 mmol g<sup>-1</sup>) and high CO<sub>2</sub> selectivity against N<sub>2</sub>, yet retains regenerability to desorb 98% CO<sub>2</sub> by simple pressure swing. This work identifies a customized route to reversible gas capture using metal-free, two dimensional carbonaceous materials, which can be extended to other useful applications.
Arsenic Toxicity of Rice and its Interrelation with Zinc
오영탁,죠유 ?베리,Oh, Yong Taeg,Sedberry, J.E. Jr. 한국토양비료학회 1974 한국토양비료학회지 Vol.7 No.1
수도에 대한 비소의 피해 및 아연-비소간의 교호작용을 온실실험으로 조사하였다. 비소 피해의 증세는 수도를 시들게 하는 것이었으며 지상부 및 지하부의 생장을 감소시키었다. 비소 피해는 1 ppm의 비소 처리구에서도 관찰되었다. 아연의 시용은 수도의 비소흡수를 억제하지는 못했지만 비소 피해를 완화시키었다. 반면 처리된 비소는 아연의 흡수를 감소시키었으며, 따라서 아연시용의 효과는 비소피해에 의한 아연흡수 감소를 보상하였기 때문이다. 이 시험중 공시토양인 Crowley SiL의 비교적 높은 토양반응에 기인하여 철 결핍증이 관찰되었다. Arsenic toxicity of rice and the interaction between As and Zn were studied in a greenhouse experiment. The symptom of As toxicity of rice was the growth retardation of tops and roots accompanied by wilting. The toxicity was observed even on the 1 ppm arsenic treated soils. Zinc applictiaon reduced As toxicity but it did not depress the As uptake by rice, while As reduced the Zn uptake by rice. There-fore, the applied Zn apparantly conpensated for the depressed Zn up-take due to As toxicity. Iron deficiency was observed during the experiment, and this was probably due to the relatively high soil reaction, pH of the Crowley silt loam.
비교란 Lysimeter를 활용한 논 토양에서의 살충제 Fenobucarb 용탈특성 구명
오영탁 ( Youngtak Oh ),임성진 ( Sungjin Lim ),김남희 ( Namhee Kim ),양지연 ( Jiyeon Yang ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),문병철 ( Byeongchul Moon ),박병준 ( Byungjun Park ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-
This study was conducted to investigate the leaching characteristics of insecticide fenobucarb using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 53.1-63.2, 40.2-47.7, and 32.6-39.2 %, respectively. Bulk densities of each lysimeter were 1.38, 1.30, and 1.35 Mg/m3, respectively. Fenobucarb was treated to each lysimeter at 14 days after rice planting, and water was supplied according to rice cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.9, 764.2, and 735.9 L, and pore volume numbers of supplied water for rice cultivation were 2.1, 1.6, and 1.3, respectively. Movement of fenobucarb in each lysimeter was investigated through the residue of fenobucarb in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Liquid chromatography (LC)-mass spectrometry (MS)-MS was used for fenobucarb analysis in water sample. Recovery and limit of quantitation (LOQ) of fenobucarb in water were 83.2-84.7% and 50 ng/L. Changes of moisture tension, humidity, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different. Weight of silty clay loam lysimeter was higher than other lysimeter because of less leaching. Leaching volume decreased with increasing clay content of paddy soil, and the volume of sandy loam, loam, and silty clay loam lysimeter were 1964.7, 1868.4, and 1265.6 L, respectively. Total leaching content of fenobucarb (treatment content 1541 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 9.6, 14.2, 21.7 μg, respectively. The content in three lysimeter was not significantly different. Fenobucarb in soil horizon of sandy loam, loam, and silty clay loam paddy soil were detected at 180.1, 54.5, and 0.4 μg, respectively. However, the most of fenobucarb in soil horizon and leaching water detected at the primary stage of experiment. These results showed that the movement of fenobucarb in sandy loam, loam, and silty clay loam paddy soil was very high.
오영탁(Yungtak Oh),한승완(Seungwan Han) 한국방재안전학회 2021 한국방재안전학회 논문집 Vol.14 No.2
본 기술은 기존의 빗물받이 및 도시형수로 시스템의 대체 가능한 기술로서 적용시 빗물은 빠르게 투수됨으로써 도시홍수를 저감할 수 있는 기술이다. 강우시 인도 방향의 제1 수로 공간으로 유입되는 빗물은 담배꽁초 등의 쓰레기는 유입되지 않고, 채움재를 통해 미세먼지 등의 오염물질을 감소시킨 후 지하로 투수시킬 수 있다. 제2 수로 공간으로 유입되는 빗물은 유속을 떨어뜨려 임시로 저류하였다가 배수관으로 배수시킴으로써, 배수관에서의 병목현상을 방지할 수 있는 도시형 수로 시스템 및 이의 시공방법에 관한 것으로 이를 통해 도시홍수 및 미세먼지 저감에 기여할 수 있을 것이다. This technology is to let rainwater flow into a waterway that is located side gutter of a street with blocking garbage including cigarette butts at the same time. The first waterway is located beside the sidewalk and it enhances the water circulation in a city. This waterway is filled with aggregates and filter media, which removes fine dust that is washed out of the street and let water flow down to the earth. The second waterway is located beside the street and it retains rainwater temporarily with decreasing its flow speed. The second waterway shall reduce flooding damages by avoiding bottleneck situation in the street inlets and storm water pipelines which is the main causation of flooding in a city.