天然斜发沸石在固定床柱中用于去除铅、铜和锌
Use of natural clinoptilolite for the removal of lead, copper and zinc in fixed bed column.
作者信息
Stylianou Marinos A, Hadjiconstantinou Michalis P, Inglezakis Vasilis J, Moustakas Konstantinos G, Loizidou Maria D
机构信息
National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science and Technology, 9 Heroon Polytechniou Str., Zographou Campus, 15773 Athens, Greece.
出版信息
J Hazard Mater. 2007 May 8;143(1-2):575-81. doi: 10.1016/j.jhazmat.2006.09.096. Epub 2006 Oct 18.
This work deals with the removal of lead, copper and zinc from aqueous solutions by using natural zeolite (clinoptilolite). Fixed bed experiments were performed, using three different volumetric flow rates of 5, 7 and 10bed volume/h, under a total normality of 0.01N, at initial pH of 4 and ambient temperature (25 degrees C). The removal efficiency increased when decreasing the flow rate and the following selectivity series was found: Pb(2+)>Zn(2+)> or =Cu(2+). Conductivity measurements showed that lead removal follows mainly ion exchange mechanism, while copper and zinc removal follows ion exchange and sorption mechanism as well.
本研究采用天然沸石（斜发沸石）去除水溶液中的铅、铜和锌。进行了固定床实验，在总当量浓度为0.01N、初始pH值为4和环境温度（25℃）的条件下，使用5、7和10床体积/小时三种不同的体积流速。去除效率随流速降低而提高，并且发现了以下选择性顺序：Pb(2+)>Zn(2+)>或=Cu(2+)。电导率测量表明，铅的去除主要遵循离子交换机制，而铜和锌的去除则同时遵循离子交换和吸附机制。
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