电膜萃取法去除模拟废水中的锌(II):采用平板支撑液膜的电解池

IF 2.9 Q2 ELECTROCHEMISTRY
Noor R. Kadhim, Hussain M. Flayeh, Ali H. Abbar
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引用次数: 0

摘要

本研究的目的是利用电膜萃取(EME)系统作为一种有效去除水溶液中锌的方法。采用了一种新颖而独特的电化学电池设计,由两个玻璃室,一个支撑液膜(SLM),一个注入1-辛醇的聚丙烯平板膜和载体组成。使用了两个电极,石墨作为阳极,不锈钢作为阴极。综合考察了多种影响因素,包括载体的选择、施加电压的大小、供体溶液的初始pH值和锌的初始浓度,以确定它们各自对锌消除效率的影响。两种不同的载体,即三(2-乙基己基)磷酸(TEHP)和二(2-乙基己基)磷酸(DEHP),在1-辛醇的利用上进行了评价。结果表明,施加电压对提高锌在膜上的传质速率起着重要作用。最佳工艺条件为:以1.0 vol.%磷酸二乙基己基醇为载体,施加电压60 V,初始pH为5,初始锌浓度为15 mg L-1,提取时间6小时,搅拌速度1000 rpm。令人惊讶的是,在这些精心设计的条件下运行,最终达到了87.3%的出色去除效率。与没有施加电压相比,观察到去除效率的显著提高,从36.67%提高到令人印象深刻的87.3%,这表明EME作为消除重金属的有效技术具有巨大的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Zinc (II) removal from simulated wastewater by electro-membrane extraction approach: Adopting an electrolysis cell with a flat sheet supported liquid membrane
The aim of this study is to utilize the electromembrane extraction (EME) system as a manner for effective removal of zinc from aqueous solutions. A novel and distinctive electrochemical cell design was adopted consisting of two glass chambers, a supported liquid membrane (SLM) housing a polypropylene flat membrane infused with 1-octanol and a carrier. Two electrodes were used, a graphite as anode and a stainless steel as cathode. A comprehensive examination of several influential factors including the choice of carrier, the applied voltage magnitude, the initial pH of the donor solution, and the initial concentration of zinc was performed, all in a concerted effort to ascertain their respective impacts on the efficiency of zinc elimination. Two distinct carriers, namely tris(2-ethylhexyl) phosphate (TEHP) and bis(2-ethylhexyl) phosphate (DEHP) were evaluated, in a tandem with utilization of 1-octanol. The results revealed essential role played by the applied voltage in augmenting the rate of mass transfer of zinc across the membrane. The best operating conditions were utilized for 1-octanol enriched with 1.0 vol.% bis(2-ethylhexyl) phosphate as a carrier, applied voltage of 60 V, initial pH of 5, initial zinc concentration of 15 mg L-1, extraction duration of 6 hours, and stirring rate of 1000 rpm. Surprisingly, operating under these meticulously devised conditions culminated in the outstanding removal efficiency of 87.3 %. In comparison with no applied voltage, a substantial enhancement in removal efficiency was observed, trans­cending from a meager 36.67 % to an impressive 87.3 % at 60 V, suggesting thus a tremen­dous potential of EME as an efficacious technique for the elimination of heavy metals.
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来源期刊
CiteScore
3.60
自引率
27.30%
发文量
90
审稿时长
6 weeks
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