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백금 및 이산화납 양극에 의한 Pinacol 수용액의 양극반응(1)
박승조,남종우,손조환 한국화학공학회 1984 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.22 No.5
백금 및 이산화납전극을 사용하여 각종 pH에서 pinacol의 양극반응을 정전위전해법으로 연구한 결과 양극반응은 pH의존적이었다. 산성역에서는 이산화납 전극을 사용하였을 때 가장 좋은 수율로 acetone이 얻어졌으며 또한 c-c결합절단반응에 관하여 Tafel slape을 구해서 이 반응메카니즘을 검토한 결과 pinacol이 acetone으로 산화되는 반응과정은 Electron-Electron(E-E)반응임을 알수 있었다. Using platinum and lead dioxide electrode, anodic process of pinacol have been investigated with potentiostatic method in various pH. Experimental results indicate that yield of acetone from pinacol is good in acidic region and electrolytic products is pH dependent. In this paper, we studied that Tafel slope for the oxidation of 0.5 M pinacol solution buffered to pH 1.2 in order to investigate the mechanism of C-C bond cleavage reaction of pinacol. Results of Tafel slope indicate that electrochemical oxidation of pinacol is electron-electron (E-E) mechanism.
Rumen 微生物에 의한 製紙 슬러지의 嫌氣性消化 特性
朴勝祚,林燦燮,安尙俊 동아대학교 환경문제연구소 1995 硏究報告 Vol.18 No.2
Correlation of hydrolysis rate, total solid content and Volatile fatty acid yield in anaerobic digestion of papermil1 sludge using Rumen microorganisms and conventional acidlogenesis were summarized as follows ; 1. Ultimate volatile fatty acid yield and hydrolysis rate produced by rumen microorganisms and conventional acidogenesis were about 7.2megVFA/gVS. 0.175-1 and 6.8meqVFA/gVS, 0.103d-1. Therefore, hydrolysis rate by rumen microorganisms was 1.7times faster than that of conventional acidogenesis. 2. During the operating, VFA composition ratios(%) produced by rumen microorganisms were acetate:propionate:butyrate=64=5: 27±7: 9±2. At 5,10,13 and 6.83meqVFAg/VS, respectively. 3. When effluents produced by MAR and RMR were anaerobically digested, methane yields were 0.27 and 0.29 ℓ CH₄/gCOD_(rem) respectively.
박승조,남정광,김정섭,박정훈 東亞大學校 附設 環境問題硏究所 2007 硏究報告 Vol.29 No.1
Phenol removal efficiency was 65-70 percent according to the results of phenol adsorption experiment loaded with activated carbon derived from leather waste by chemical activation with K₂CO₃ [ACLW], but phenol removal efficiency was 100 percent added with commercia1 activated carbon [AC]. Phenol adsorption experiment reacted with the phenol solution containing 1.25, 2.50, 5.00, 6.25 g/L during 90 minutes. However removal efficiency of Blue 79 was 100 percent loaded with waste by chemical activation with K₂CO₃ [ACLW] and removal efficiency was poor added with commercial activated carbon [AC]. Concentration of Blue79 [2-Bromo- 4,6, dinitroaniline-3-Bis-(2-acetoxyethylene) amino-p-aceto pheneridide] was 40 mg/L.
朴勝祚,金秀生 동아대학교 환경문제연구소 1987 硏究報告 Vol.10 No.1
This study was carried out in a batch and a continous apparatus for heavy metal ion removal in natural water using natural and calcinated zeolite. Some results obtained are summerized as followings; 1. The best one of adsorbent is calcinated zeolite(16/35 mesh) 2. The adsorption equlibria data can be approximated to Freundlich isotherm equation. 3. Removal cost of heavy metal in natural water is about 3.2won/natural water (ton)