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남숙현 ( Sook-hyun Nam ),구재욱 ( Jae-wuk Koo ),김은주 ( Eun-ju Kim ),박재로 ( Jae-ro Park ),전숙례 ( Sook Lye Jeon ),박주현 ( Joo Hyun Park ),문병진 ( Byeong-cheon Mun ),황태문 ( Tae-mun Hwang ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.6
This study was carried out to investigate the coagulation performance of some natural and synthetic material to remove chlorophyll-a and suspended particles in water. This natural coagulant is made of vegetable substances and plant-mineral composites. The removal of chlorophyll-a and suspended particles as a function of time, dose and initial concentration are tested. The natural coagulant dosage is determined with jar tester method. Samples in this study are mixed with water with high contamination of several algae species. The chlorophyll-a removal rate was 98 % and BGA removal rate was 100 % in water with low concentration of chlorophyll-a(sample A). The chlorophyll-a removal rate was 86 % and BGA removal rate was 76 % in water with high concentration of chlorophyll-a(sample C). It could also improve particulate and organic matter removal efficiency, indicating that it was highly effective as the coagulant agent. Also, an optimal dosage of coagulant on sample C becomes 2 times to 3 times larger than sample A. The fluorescence spectroscopy method using EEM showed that the peak of phycocyanin and Chlorophyll-a was simultaneously removed after the coagulant treatment. This method will be useful tool as an monitoring device. As a result of experiment using Daphnia magna as an indicator of toxicity, the optimal concentration of natural coagulant used in this experiments did not have a significant effect on toxicity.
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