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이태관,Lee Tae-Gwan 한국환경과학회 2005 한국환경과학회지 Vol.14 No.6
The aim of this study was to analyze the local distribution of the heavy metal concentration in Daegu and Ulsan which were divided into the residual areas, the traffic dense areas and the industrial areas. The Inductively Coupled Plasma(ICP) was used to analyze heavy metals, such as As, Cr, Hg, Zn, Cd, Pb, Cu and minor metals, such as Fe, Si, Mg, Ca, AI, Na, K. The results of this analysis showed that the content of heavy metals which was classified by districts in Daegu and Ulsan was the highest in the industrial areas followed by the traffic dense areas and the residual areas. Compared to the level of heavy metals of national and local soil survey network in 2003, contamination of heavy metals in Daegu was lower than national average. However, the content of Cd, As, Zn in Ulsan was respectively 13.38 times, 472 times and 2.65 times higher than national average contamination. In addition, compared to the soil pollution level of the environmental protection law, contamination of all areas in Daegu was lower. But the content of As at the industrial areas in Ulsan was 10.71 times higher than standard of soil pollution and 4.28 times higher than standard of measures against soil contamination.
Microcystis aeruginosa 의 최적응집교반조건 (1)
이태관(Tae Gwan Lee),진정숙(Jeong Sook Jin) 한국수처리학회 2001 한국수처리학회지 Vol.9 No.2
N/A In this study, optimum mixing time and mixing velocity for the coagulation were investigated when the water treatment system has algae during the eutrophication. Water treatment systems are suffered by algae during the summer. For this problem, advanced treatment was adopted. However, low efficiency of coagulation in C Water Treatment System can be caused by low efficiency of advanced treatment. The optimum mixing time for the coagulation was rapid mix 2 minutes, slow mix 15 minutes and settlement 30 minutes. The optimum mixing velocity for the coagulation was rapid mix 180 rpm, low mix 50 rpm. As a result, the optimum mixing time and rpm are following rapid mix 2 minutes in 180 rpm, low mix 15 minutes in 50 rpm and settlement 30 minutes.
이태관 ( Tae Gwan Lee ) 한국수처리학회 2014 한국수처리학회지 Vol.22 No.3
In common case, the algal growth curve is divided into 4 stages such as a lag phase, a log phase, a stationary or death phase. The algae needs several different nutrients at each phase. In this study, I tried to analyze a correlation between a algal growth divided on algae growth stages and water quality factors in lake Juam. On the result of analysis, there was a normal correlation between Chl-a and several factors and conductivity on the lag phase. On the log phase, strong correlations began to show between Chl-a, the number of cyanobacteria and water quality factors affiliated with phosphorus element. And the number of cyanobacteria also began to relate high to the number of green and total algae. During an entire period, there was a significant correlation between Chl-a, nitrogen and phosphorus, so nutritive salts had a possibility to be a major nutrient for a algal growth. To control a algal growth for lake Juam, I recommend to make the basic plan of water quality management included nutritive salts control plan for the entire period.
이태관 ( Tae Gwan Lee ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.3
N/A This paper presents the integrated technique of Water Quality Analysis and Geographic Information System(GIS) for assessing the water quality variation by supply distance in Sangri Water Supply System. GIS was utilized for extraction of a pipeline route and supply distance, and Water Quality is analyzed every month for appraising the variation of each item such as free chloride, mesophilic bacteria, iron, aluminum, manganese and lead concentration. As a result, free chlorine, mesophilic bacteria and iron concentration are affected both water supply distance and water temperature. However, manganese concentration was affected by water supply distance rather than water temperature and on the contrary, aluminum concentration was more affected by water temperature. Thus it is found that water quality becomes worse as water temperature and supply distance is increased.