New Approaches to Comprehensive Electrochemical Processing of Sulfate-Chloride High-Mineralized Wastewater Treatment Residues

IF 0.5 Q4 ENGINEERING, CIVIL

Architecture Civil Engineering Environment Pub Date : 2023-09-01 DOI:10.2478/acee-2023-0044

Tetyana Shabliy, Olena Ivanenko, Sergii Plashykhin, Nonna Pavliuk, Artem Safiants, Dmytro Sidorov

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Abstract

Abstract The results of electrochemical processing of spent acidic, neutral, and alkaline sulfate-chloride-containing regenerative solutions in two- and three-chamber electrolyzers are presented. It has been determined that the highest current efficiency for the products of electrodialysis can be achieved in the presence of hardness ions when processing acidic sulfate-containing solutions using three-chamber electrolyzers. It has been established that during electrodialysis of alkaline solutions after regeneration of anionites containing chloride ions, accumulation of alkali occurs in the cathodic region, and in the anodic region, chloride ions accumulate due to diffusion through the anion exchange membrane during the first stage, followed by preferential oxidation of chloride ions with liberation of free chlorine during the second stage. It has been shown that electrodialysis can effectively solve the problem of comprehensive processing of neutral, alkaline, and acidic regenerative sulfate-chloride-containing solutions, with the production of alkali and acid at concentrations suitable for reuse in regeneration processes.

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硫酸盐-氯化物高矿化度废水处理废渣电化学综合处理新途径

摘要介绍了在二室和三室电解槽中对酸性、中性和碱性硫酸盐氯化物废再生液进行电化学处理的结果。已经确定电渗析产品的最高电流效率可以在硬度离子存在的情况下实现，当使用三室电解槽处理酸性硫酸盐溶液时。它已经建立,在电渗析含有氯离子的碱液再生阴离子交换后,碱的积累发生在阴极区,在阳极区,氯离子积累由于扩散通过阴离子交换膜在第一阶段,其次是优惠与解放的自由氯离子氧化氯在第二阶段。研究表明，电渗析可以有效地解决中性、碱性、酸性含硫酸盐氯化物再生溶液的综合处理问题，产生的碱和酸的浓度适合在再生过程中重复使用。

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来源期刊

Architecture Civil Engineering Environment ENGINEERING, CIVIL-

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20.00%

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