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맹승진 ( Maeng Seung-jin ),이순혁 ( Lee Soon-hyuk ),나상일 ( Na Sang-il ),이순주 ( Lee Soon-ju ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-
In this study, following works have been carried out : division of Nakdong River Basin into 25 sub basins, development of a technique to evaluate spatial distribution of rainfall and analysis of rainfall data of 169 stations, selection of control points, and selection of a hydrologic model(SSARR). Analysis results were found that total volume of discharges at every control points have errors in a reasonable range, and the correlations between observed and calculated daily runoff discharges at every control points were well coincided.
송승주 ( Song Seung Ju ),오병수 ( O Byeong Su ),나승진 ( Na Seung Jin ),이응택 ( Lee Eung Taeg ),강준원 ( Kang Jun Won ) 한국물환경학회 2004 한국물환경학회지 Vol.20 No.2
The purpose of this study was to investigate the heterogeneous catalytic ozonation of oxalic acid by manganese (Mn) doped-granular activated carbon (GAC). In order to observe the effect of the amount of Mn doped on GAC, catalysts were manufactured by varying the impregnated Mn concentration. In this paper, the following had labeled all sorts kinds of Mn-doped GAC were labeled with suitable names according to the amount (mM) of the concentration of dipping solution: They were each named as `Mn20`, `Mn50`, `Mn100` and `Mn200`. These experiments were performed in a batch reactor (0.5 L) and a semi-batch reactor (1L) and Mn-free GAC was used as a blank catalyst. The ozone decay properties of each manufactured catalyst were firstly investigated to find out the reactivity between the aqueous ozone and the catalysts. Oxalic acid removal by catalytic ozonation was then performed to demonstrate the oxidative efficiencies of each catalyst.