槽式电渗析工艺去除电镀废水中的铜和镍

IF 0.8 4区 工程技术 Q4 ENGINEERING, CHEMICAL Membrane Water Treatment Pub Date : 2021-07-01 DOI:10.12989/MWT.2021.12.4.149
K. Min, J. Kim, Sun Wouk Kim, Seunghyung Lee, Hyun-Gon Shin, K. Park
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引用次数: 2

摘要

电渗析(ED)是一种利用电位差处理工业废水的先进分离工艺。在这项研究中,通过创建流动通道来增加极限电流密度(LCD),从而增加了堆内的流速。增加堆内的流速会增加扩散通量,从而导致LCD的增加。实验表明,与没有流道的堆叠相比,流动加速堆叠的施加电压提高了12.2%,但LCD降低了3.6%。两个堆叠对铜和镍的去除率均大于95.6%,没有显著差异。然而,在没有流动通道的堆叠中,离子的浓度速率是优越的。这可能归因于这样一个事实,即当连接通道时,施加的电压增加,导致分离速率和由此产生的浓度极化的差异。就电流效率而言,发现无沟道堆叠比沟道堆叠好42.5%。希望施加低于LCD的电压,因为在相同的膜流速下超过LCD的电压将显著降低经济可行性。
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Copper and nickel removal from plating wastewater in the electrodialysis process using a channeled stack
Electrodialysis (ED) is an advanced separation process used to treat industrial wastewater using potential differences. In this study, flow rates within the stack were increased by creating a flow channel to increase the limiting current density (LCD). Increasing the flow rate within the stack increases the diffusion flux, which leads to an increase in LCDs. Experiments show that the applied voltage of the flow-accelerated stack was improved by 12.2% compared to the stack without a flow channel, but the LCD decreased by 3.6%. The removal efficiency of both copper and nickel between the two stacks was greater than 95.6%, with no significant difference. However, the concentration rate of ions was superior in the stack without a flow channel. This may be attributed to the fact that the applied voltage increases when the channel is attached, resulting in differences in the separation rate and the resulting concentration polarization. In terms of the current efficiency, the channel-less stack was found to be 42.5% better than the channeled stack. It would be desirable to apply voltages below the LCDs as those exceeding LCDs at the same membrane flow rate would significantly reduce the economic feasibility.
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来源期刊
Membrane Water Treatment
Membrane Water Treatment ENGINEERING, CHEMICAL-WATER RESOURCES
CiteScore
1.90
自引率
30.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Membrane and Water Treatment(MWT), An International Journal, aims at opening an access to the valuable source of technical information and providing an excellent publication channel for the global community of researchers in Membrane and Water Treatment related area. Specific emphasis of the journal may include but not limited to; the engineering and scientific aspects of understanding the basic mechanisms and applying membranes for water and waste water treatment, such as transport phenomena, surface characteristics, fouling, scaling, desalination, membrane bioreactors, water reuse, and system optimization.
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