淨水 處理用 補助 凝集制로서 마그네슘 알긴 酸鹽에 관한 연구

다국어 초록 (Multilingual Abstract)

Aluminium sulfate and poly aluminium chloride(PAC) which are a coagulant are used to clean the water in our filtration plant. Therefore, high density of aluminium have dissolved in drinking water. High density of aluminium in the drinking water was reported to be a factor of Alzheimer's disease or presenile dementia which are neuropathologic disorder and neurological disease. Also increment of turbidity and decrement of chlorine are caused by a dissolved amount of aluminium in the water, So it is important to improve a coagulant and coagulable methods.
In order to examine these remaining aluminium dissolved in drinking water, main coagulant (aluminum sulfate, PAC. PASS. PSO) was added to the water and stirred (120 rpm) with Jar-Test violently for 5 min. After reduced speed(60 rpm). magnesium alginate. sodium alginate and ammonium alginate which are aid coagulant were added to the mixture expectively and stirred for 20 min. followed by standing for 20 min. Upper layer was collected and tested for turbidity, aluminium, heavy metal and flock etc. which of analysis were performed by turbidity meter and ICP.
As a result of analysis the turbidity and remaining aluminium, when the both of main coagulant and aid-coagulant (alginate) was used, the reduction of turbidity and the removal of aluminium were more effective than used only main-coagulant alone. In this case, addition of alginate was shown somewhat difference as a each coagulant, but about 0.7-1.3mg/L of that was most effectively. Among the alginate, magnesium alginate was more effective, and main-coagulant could be economized on as 20-40% ratio than used independantly.