UV-Spectrophotometer 를 이용한 수중 경유 분석법

정광용,이종식 한국환경농학회 1999 한국환경농학회지 Vol.18 No.1

관개수중에 함유된 경유정량을 위한 간이법을 개발하기 위하여 수행한 본 시험의 결과, n-Pentane를 이용하여 경유를 정량하기 위한 최적 파장은 257㎚, 정량범위는 100∼800㎎/ℓ이었으며, 시료에 함유된 경유의 회수율은 102∼121%이었다. 실험 온도를 20℃ 전후로 유지시킬 경우, 침출후 1시간까지 농도변화가 5% 이내로 휘발에 의한 실험 오차가 적었다. This study was conducted to find out analytical method for diesel fuel using uv-spectrophotometer in water samples. The optimum wavelength, detection limit and recoveries for desel fuel extracted with n-pentane were 257㎚, 100∼800㎎/ℓ and 102∼121%, respectively. This method were stable for measuring concentrations of desel fuel for 1 hour at 20±1℃ condition.

OPEC 현상과 장래

정광용,Jeong, Gwang-Yong 대한석유협회 1983 석유와 에너지 Vol.1983 No.3

서천 오석리유적 출토 토기복원

정광용,강태춘,임세진,Chung, Kwang-yong,Kang, Tae-chun,Lim, Se-jin 국립문화재연구소 2007 保存科學硏究 Vol.28 No.-

Restoration of earthenware is largely composed of selection of clay, making(forming), and firing. This study lays emphasis on the making method and open-air firing. For making methods, This study used coiling method partly with priority given to ring method. The most significant feature of this restoration work is the making method of tap-forming, in which 외박자(out tap instrument) and 내박자(inter tap instrument) would be tapped and formed. For firing, This study used open-air firing method in the most primitive way. This method needs no special device and equipment and makes the work more simple and easy. The previous study was on the making method by archeological and preservation-scientific research but this study emphasized the restoration work in an actual earthenware maker's position. Through the result of this study, This study wish this would be an opportunity to present another model of various restoration methods for other researchers those who wanted to participate in the restoration and openair firing.

부석사 조사당 벽화조사에 따른 적외선 T.V카메라 이용

정광용,Chung, Kwang-Yong 국립문화재연구소 1986 保存科學硏究 Vol.7 No.-

In the fields of the cultural properties, the Infrared TV camera is being initiated to use instead of the Infrared photo film fo a better means to detect the description of drawings of the paintings. Seeing from the effect of transillumination, the Infrared TV camera with its long wave of visible spectrum that makes less absorption by the pigments and with the reflection rays passing through the base of colour layers makes it able to findbase drawing and letters. The detection range of transillumination by the infrared rays depends on the kinds of pigments, lines of the base drawing and wave length of the infrared rays. In our country, it was the first time to detect by our Conservation Science Dep't of The Research Institute of Cultural Properties by means of using Infrared TV camera to determine the mural paintings on the Josadang, Busuk Temple, resulted in an epoch-making success, that we have come to know the painting technique methods, how to treat for its conservation and making replica, reproduction, etc.

남한산성 여장 손상원인 분석

정광용,이상옥,양희제,Chung, Kwang-Yong,Lee, Sang-Ok,Yang, Hee-Jae 한국건축역사학회 2016 건축역사연구 Vol.25 No.1

There are many reasons of damage in Namhansanseong Yeojang. Lots of damage types are observed in each Yeojang. There are many types of damage factors but major damage factor is breakage by freezing and thawing. So Conduct non-destructive evaluation about damage factors in Namhansanseong Yeojang to analysis weathering factors in Yeojang by measuring directional microclimate. The study will pave the way for conservation management in Namhansanseong by suggesting the conservation calendar about weather condition and damage factors.

전(塼)의 백화현상 규명 및 제거방안 연구 - 수원화성 백화현상을 중심으로 -

정광용,차현석,Chung, Kwang-Yong,Cha, Hyun-Seok 한국건축역사학회 2013 건축역사연구 Vol.22 No.6

This study progressed an investigation on the cause of the efflorescence phenomenon of bricks in Suwon Hwaseong Fortress, which is designated as a UNESCO World Heritage by using diverse scientific analyses. The samples were taken in Hwaseong and analyzed using XRD and SEM-EDS for the material identification of efflorescence. We observed under a polarizing microscope and measured absorption factors for the basic investigation for traditional bricks. As a result of material identification, soluble salt($Na_2SO_4$, $KNO_3$) and insoluble salt($CaCO_3$) were detected. There was no big difference between original bricks and repaired bricks under the polarizing microscope. However, in terms of the water absorption rate, bricks which were used for repair nowadays showed low water absorption rate(1%). In conclusion, soluble salt and insoluble salt appeared due to an effect of an air pollution and joint mortar. Soluble salt was removed in the rainy season, but insoluble salt was not removed. As a result of the efficiency and safety tests for chemicals removing efflorescence, chemical E is likely to be the suitable chemicals for the efflorescence phenomenon of traditional bricks in Suwon Hwaseong Fortress. In the future, consideration whether the use of lime is available or not should be studied through comprehensive researches including repair work, construction work and the environment factor with lime. Also, physical, chemical identifications of repairing bricks will be required.

수자원 기초 조사 활성화를 위한 자문회의 개최

정광용 한국수자원학회 1993 물과 미래(한국수자원학회지) Vol.26 No.3

畜産廢水 處理技術

鄭光溶 농촌진흥청 1993 농촌생활과학 Vol.14 No.1

농축산 폐기물 처리를 위한 저온내성(低溫耐性) 메탄 생성균의 특성에 관한 연구 : 1. 저온조건에서 시료별 메탄 생성기작 연구

정광용,김재정 한국환경농학회 1993 한국환경농학회지 Vol.12 No.1

本 硏究는 低溫期의 農畜産 廢棄物 처리를 위한 嫌氣醱酵 效率을 增進코저 低溫에 耐性을 갖는 메탄 生成菌株를 開發하여 醱酵 母菌으로 이용하려 하였다. 試驗에 사용한 試料는 北緯 34.8~37.4度의 國內, 北緯 41.4度 地域인 美國의 中北部 및 北緯 54.5~56.9度의 카나다 亞寒帶 地域의 土壤, 늪지 堆積物, 水中 堆積物 및 有機物 堆積層 등을 採取하여 사용하였다. 採取된 試料는 低溫條件에서 메탄 生成量의 測定, 低溫耐性 메탄 生成菌의 生態的 特性을 調査하였으며 그 結果는 다음과 같다. 1. 低溫에서 메탄 生成量은 Cellulose 培地가 Methanol 培地보다 더 높았다. 2. 低溫(8℃)에서의 CH_4 發生量은 亞寒帶 地域 늪지 堆積物에서 30일 동안에 15~19 moles/ml 로 높았으나 溫帶地域 試料에서는 檢出되지 않았다. 3. 亞寒帶 地域 試料(카나다, 54.5 ˚N)의 집적 培養液에 메탄 생성균에 영향을 주지 않는 40 ㎍/ml의 Streptomycin + Vancomycin 또는 Ampicillin + Oleandomycin 처리로 CH_4生成量이 57~67% 抑制되었다. 4. 溫帶地域 試料에는 高溫에 耐性을 갖고 있는 메탄 生成菌株 가 있으며, 亞寒帶 地域의 試料에는 高溫性菌이 存在하지 않는 반면에 8~13℃ 의 低溫에 耐性을 갖는 메탄 生成菌株의 존재를 확인할 수 있었다. The Study was conducted to develope the low temperature tolerant methane-producing bacteria(LTTB) and to increase the efficiency of anaerobic fermentation for the treatment of agricultural and livestock wastes at low temperature. The samples were collected from muddy soil, water logged sediment, organic layer and anaerobic sludge at three latitudes, 34.8~37.4 ˚N(Korea), 41.4 ˚N(USA) and 54.5~56.9 ˚N(Canada). They were used for determination of the methanogenesis rates for isolation and identification of the LTTB. The methanogenesis rate of smaples at low temperature were higher in the cellulose medium than methanol medium. The methanogeneses rate in the samples of subarctic region were 15~19 moles/ml during 30 days at low temperature(8 ℃), whereas not detected in the samples of temperate region. The methanogenesis rate in the enrichment culture of subarctic samples were inhibited by the 40 ㎍/ml of streptomycin + vancomycin or ampicillin + oleandomycin which were not effect to the methanogens. An inhabitation of high temperature tolerant methane producing bacteria was identified in the samples of temperate region, whereas that of the LTTB growing at 8~13℃ was identified in the subarctic region.

가축분(家畜糞) 건조 , 발효 복합시설 개발 연구 : Ⅱ. 돈분(豚糞) 건조 , 발효 , 복합시설 실증시험 Ⅱ. Demonstration of a Pig Manure Treatment System on a Farm

정광용,유순호,윤순강,박우균,권순익,박홍재 한국환경농학회 1994 한국환경농학회지 Vol.13 No.2

固形 畜産廢棄物에 의한 農業環境 汚染을 줄이고 廢棄物 중에 함유된 植物에 유용한 養分物質의 效率的인 再活用을 위하여 中, 小規模 양돈농가에서 비닐하우스 豚糞건조발효 복합시설을 開發하여 적용 가능성과 효율을 구명하고자 농가 實證試驗을 수행하였다. 乾燥床은 圓形 콘크리트 바닥형태를 적용하였고 豚糞의 攪拌은 機械式 攪拌機를 이용하였으며 乾燥床에서 수분이 감소된 豚糞의 醱酵를 위하여 2組 1式의 送風式 醱酵床으로 구성된 乾燥, 醱酵施設에서 시험을 수행하여 얻어진 結果는 다음과 같다. 氣溫이 높은 계절에는 機械式 攪拌機를 이용한 乾燥床에서 最初投入되는 豚糞의 수분함량이 70-80%였던 것이 乾燥床을 통과하여 醱酵床에 투입되는 단계에서의 糞糞 水分含量은 醱酵에 적합한 45-65%에 달하였으나 氣溫이 낮아질수록 乾燥床에서의 攪拌에 의한 水分除去率이 감소되었다. 豚糞乾燥時 水分調節劑로 이미 乾燥된 豚糞을 副材料로 사용하였을 때 水分減少率은 52.1%로 生豚糞만을 乾燥하였을 때에 水分減少率 19.7%에 비하여 水分除去 效果는 32.4% 增加한 結果를 보였다. 生豚糞과 乾燥豚糞 간의 乾燥期間 經過에 따른 豚糞 중 化學成分 含量間에는 큰 차이가 없이 類似한 경향을 보였으며 P₂O_5 含量은 生豚糞에 비하여 乾燥豚糞에서 輕微하게 높은 경향을 보였다. 그리고 生豚糞과 乾燥豚糞 중 無機成分 含量도 큰 차이가 없었으며 成分別로 볼때 CaO가 가장 높았고 다음이 K₂O, MgO, Na₂O였다. 豚糞을 乾燥함에 따른 微生物 密度는 生豚糞에 비하여 乾燥豚糞에서 E. coli 141.9倍 그리고 Streptococci는 236.2倍가 減少하였다. 豚糞 乾燥, 醱酵複合施設의 總費用은 4,185,630원이었으며 本 乾燥施設運用費는 190,000원/年으로 頭當 乾燥施設 관리 所要經費는 985원(200頭 基準)였다. A practical study on a drying and fermentation system equipped with a stirring machine operated mechanically, of pig manure was conducted to prove the efficiency of and practicability to an ordinary pig farm. The type of the drying bed was a round-shaped (r=3m) concrete structure and the stirring machine was adopted to stir and transfer dried pig manure to the fermentation tank. The dried pig manure was put into a fermentation tank (V=18㎥), which was aerated from pipe lines installed at the bottom. While water content of pig manure passing through a drying bed was remarkably reduced than before drying, the drying efficiency of this system decreased in winter. However, the temperature of pig manure piled up in the fermentation room in winter reached over 60℃ and excess water of pig manure was removed during the fermentation process. The reduction rate of water content of pig manure, to which dried pig manure was added as bulking material on the drying bed, was 52.1%, but when dried without bulking material it was only 19.7%. Although the content of P₂O_5 of dried pig manure was slightly higher than that of fresh pig manure, progressive changes in chemical composition between fresh and dried pig manure made no great difference. Among the contents of minerals of fresh and dried pig manure, CaO was the highest and the rest were in the decreasing order of K₂O, MgO, and Na₂O. Population density of E. coli and Streptococci of dried pig manure was reduced by 142 and 236 times that of fresh pig manure, respectively. The installation cost of this drying and fermentation system was 4,185,630 won (approximately 5,232 US $) and operating cost per year was 190,000 won (237.5US $) on the basis of self-labor condition.