Combined ultrafiltration and suspended pellets for lead removal

機構典藏 > College of Engineering > Graduate Institute & Department of Water Resources and Environmental Engineering > Journal Article > Item 987654321/44582

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Title:	Combined ultrafiltration and suspended pellets for lead removal
Authors:	李奇旺;Li, Chi-wang;Liang;Yang-min;Chen, Yi-ming
Contributors:	淡江大學水資源及環境工程學系
Keywords:	Ultrafiltration;Lead;Pellet;Crystallization
Date:	2005-10-15
Issue Date:	2010-03-26 16:27:30 (UTC+8)
Publisher:	Elsevier
Abstract:	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.
Relation:	Separation and Purification Technology 45(3), pp.213-219
DOI:	10.1016/j.seppur.2005.04.005
Appears in Collections:	[Graduate Institute & Department of Water Resources and Environmental Engineering] Journal Article

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