Combined ultrafiltration and suspended pellets for lead removal
學年 94
學期 1
出版(發表)日期 2005-10-15
作品名稱 Combined ultrafiltration and suspended pellets for lead removal
著者 李奇旺; Li, Chi-wang; Liang; Yang-min; Chen, Yi-ming
單位 淡江大學水資源及環境工程學系
出版者 Elsevier
著錄名稱、卷期、頁數 Separation and Purification Technology 45(3), pp.213-219
摘要 A novel process combining an outside-in ultrafiltration membrane and suspended pellets in a stirred tank reactor for removing lead (Pb) from aqueous solutions was investigated. The incorporation of the membrane avoids breakthrough of fine particulate matter, which can plague conventional fluidized pellet reactors. The Pb removal efficiency increased with increasing solution pH and pellet surface area. At pH 7, increasing the total carbonate-to-lead molar ratio increased lead removal efficiency. However, increasing pH is more effective than increasing total carbonate-to-lead molar ratio for improving treatment efficiency. Using XRD, SEM and EDX, we concluded that the surface of the pellets was approximately 15% covered by Pb3(CO3)2(OH)2 at pH 9.0 after 5 days of operation with a feed containing 50 mg L−1 Pb.
關鍵字 Ultrafiltration;Lead;Pellet;Crystallization
語言 en
ISSN 1383-5866
期刊性質 國外
國別 GBR
出版型式 ,紙本

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