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    題名: Combined ultrafiltration and suspended pellets for lead removal
    作者: 李奇旺;Li, Chi-wang;Liang;Yang-min;Chen, Yi-ming
    貢獻者: 淡江大學水資源及環境工程學系
    關鍵詞: Ultrafiltration;Lead;Pellet;Crystallization
    日期: 20051015
    上傳時間: 2010-03-26 16:27:30 (UTC+8)
    出版者: Elsevier
    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.
    關聯: Separation and Purification Technology 45(3), pp.213-219
    DOI: 10.1016/j.seppur.2005.04.005
    顯示於類別:[水資源及環境工程學系暨研究所] 期刊論文

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