Polymer-enhanced ultrafiltration process for heavy metals removal from industrial wastewater
Polymer-enhanced ultrafiltration process for heavy metals removal from industrial wastewater
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DOI：
10.1016/j.desal.2010.02.008
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发表时间：
2010-06-01
期刊：
影响因子：
9.9
通讯作者：
Schmidt, E.
中科院分区：
文献类型：
--
作者：
Barakat, M. A.;Schmidt, E.
近年来，络合-超滤技术已被证明是一种很有前途的去除溶液中重金属的技术。在这项研究中，聚合物增强的超滤过程已被研究用于去除有毒的重金属，如铜（II），镍（II），铬（III）从合成废水溶液。羧甲基纤维素作为一种水溶性聚合物，用于络合的阳离子形式的重金属过滤前。复合物的尺寸必须大于所选膜的孔，以便复合物可以被保留。渗透水然后从重金属中净化。使用超滤膜系统进行过滤实验，该系统配备有截留分子量为10，000 Da的聚醚砜膜。压力固定在1巴，渗透物流速为7.5L/h。不同的参数，影响金属的截留率，如pH值，金属离子浓度。CMC/金属比率和渗透通量（F）已经被研究。同时还评价了在含有Ni（II）、Cu（II）和Cr（III）离子的水溶液中的金属截留率。实验结果表明，随着CMC浓度的增加，pH >= 7时金属截留率最大。(C)2010 Elsevier B. V.保留所有权利。
Recently, the complexation-ultrafiltration technique has been shown to be a promising technique for removal of heavy metals in solution. In this study, a polymer-enhanced ultrafiltration process has been investigated for removal of toxic heavy metals such as Cu(II), Ni(II), and Cr(III) from synthetic wastewater solutions. Carboxy methyl cellulose as a water-soluble polymer was used for complexing the cationic forms of the heavy metals before filtration. The size of the complex has to be larger than the pores of the selected membrane so the complex can be retained. Permeate water is then purified from the heavy metals. Filtration experiments were performed with ultrafiltration membrane system, equipped with a polyethersulfone membrane with a 10,000Da cut-off. The pressure was fixed at 1 bar with a permeate flow rate of 7.5 L/h. Different parameters, affecting the percentage rejection of the metals, such as pH, metal ion concentration. CMC/metal ratio, and permeate flux (F) have been investigated. Metal rejection in aqueous solution containing Ni(II), Cu(II) and Cr(III) ions simultaneously was also evaluated. Results obtained revealed that the maximum percentage of the metal rejection was achieved at pH >= 7 with increasing of the CMC concentration. (C) 2010 Elsevier B.V. All rights reserved.