정수처리공정에서 Bisphenol-A의 제거에 관한 연구
Bisphenol-A Removal in Conventional Water Treatment Systems
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Abstract
This study was carried out to investigate influencing factors of bisphenol A(BPA) removal characteristic in conventional water treatment systems to be connected with coagulation, sedimentation, filtration and disinfection. The result are summarized as follows; In BPA removal, optimal doses of PAC, alum, ferric chloride were 7.5 mg Al/L, 10.0 mg Al/L, 15.0 mg Fe/L. PAC was most effective coagulant to remove BPA. In coagulation process, BPA removal efficiency were increased about 2% by adjusting pH of raw water as 6. At temperature rise 10oC, BPA removal efficency were increased 0.94%. but BPA removal efficiency in sand filtration process were under 1%, so that BPA was almost not removed. At free chlorine dose 1, 2 mg/L, the reaction rate constant k in the BPA removal have been calculated to be 0.397, 0.953 min-1. At free chlorine dose 1, 2 mg/L, degradation reaction of BPA was completed during 10 min and BPA removal efficiencies were 97.66, 99.99% at this time.
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