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2-Methylisoborneol(2-MIB)제거를 위한 산화 및 흡착공정의 특성
최근주,김상구,류동춘,신판세,손인식,오광중 한국환경과학회 2002 한국환경과학회지 Vol.11 No.3
One of the Musty and earthy smell compounds in raw water is generally attributed to 2-methylisoborneol (2-MIB). It is well known that activated carbon and oxidants such as O_3, ClO_2 are effective ways to control 2-MIB. In isotherm equilibrium experiments, 2-MIB in distilled water was much more adsorbed to the activated carbon(A/C) than raw water containing dissolved organic carbon (DOC). The Freundlich constants(k) of distilled water and raw water were 3.36 and 0.049, and 1/n values were 0.80 and 0.42, respectively. The 2-MIB residual rate were Y = e^(0.55_x)~ e^(-0.54_x) with Ozone(O_3) dose by 5 minutes contact time at the 241 and 353 ng/L initial concentrations. The 2-MIB residual rate were Y = e^(-0.32_X)~ e^(-0.35_X) with Chlorine dioxide(ClO_2) dose by 15 minutes contact time at the 89 and 249 ng/L initial concentrations. 2-MIB was decreased from 1911 ng/L to 569ng/L by post-ozonation(70%removal efficiency) and removal efficiencies of 2-MIB by the following 4 kinds Granular Activated Carbon(GAC) process such as coal base, coconut base, wood base and zeolite+carbon base were 95.8, 89.5, 88.4, and 93.7% respectively.
이영식,손진언,류동춘 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1
1. The maximum Chl.-a removal efficiency has shown 80.7% by preozonation and the suspended solid also removed, furthermore represented high relationship between Chl.-a and suspended solid. 2. For Chl.-a removal, increasing contact time was more effective method, since the removal efficiency of Chl.-a was decreased per ozone dosage with increasing ozone dosage. 3. The result of proceeding jar-test, the optimum removal was shown at 3 minute contact tie and 3 ㎎/l ozone dosage. 4. Adding coagulant more than optimum dosage represented high residual turbidity and would be negative effect of ozone-coagulation-sedimentation press. 5. The decreasing of zeta potential was more than of residual turbidity after preozonation treatment which was represented that preozonation will be positive effect to the later coagulation and flocculation processes.
손진언,이영식,류동춘 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2
Phytoplankton in drinking water source bring about variation of pH and produce turbidity and color. They also cause filter clogging and interference of coagulation-sedimentation line in water treatment process and become THMs precusors which resulted from metabolic material of phytoplankton cells and dissolved used at the oxidation step in water treatment plant forms harmful by-products such as THMs, especially in contact with water containg high phytoplankton concentration. This study investigated effect of phytoplankton removal by ozonation as a replacement for chlorination.
손진언,이영식,김상구,류동춘,정종문,류재익 동아대학교 환경문제연구소 1995 硏究報告 Vol.18 No.1
Environmental factors of Quality were Temperature, pH, DO, COD, NH₄^(+)-N, No₂^(-)-N, NO₃^(-)-N, PO₄^(3-)-P, transparency and Chl-a. The values range were 3.3-31℃, 7.0-9.3, 8.0-16.8mg/l, 2.9-6.5mg/l, 0.0l-0.8mg/l, 0.0l-0.15mg/l, 0.8-3.7mg/1, 0.01-0.l7mg/l, 0.5-2.0m, 3.1-49.8mg/l, respectively. The phytoplankton are identified as 170taxa, and the order of appearing frequency is as following; Chlorophyceae, Bacillaripphyceae, Cyanophyceae, Chrysophyceae, Euglenophyceae, Dinophyceae. The causative species of red tide were identified as Microcystis aeruginosa, Trachellomonas hispida, Ceratium hirundinella,' Peridinium, Melosira italica, Staurastrum dorsidentiferum var. ornatum. Minimum Standing crops of algae cell was 728 cell/ml at point 4 on December and Maximum Standing crops of algae cell was 4.68×106 cell/ml at point 2 on August. Dominance species are Cyclotella glomerata and Microcystis aeruginosa during winter to spring season and summer to autumn.