Effect of surfactants on the reduction of industrial saline wastewater by electrodialysis

doi:10.16085/j.issn.1000-6613.2023-0574

Abstract

Abstract:

The studies on the effects of surfactants on electrodialysis systems are limited. The effect of surfactant type on the reduction of industrial saline wastewater by electrodialysis was examined. Anionic and cationic surfactants, typified by sodium dodecylbenzene sulfonate (SDBS) and dodecyl dimethyl benzyl ammonium chloride (DDBAC), caused an inhibitory effect on the electrodialysis system by forming a contamination layer on the membrane surface. Membrane resistance increased from 4.72Ω•cm² to 30.46Ω•cm² and 15.23Ω•cm². In addition, compared to the pure sodium chloride system, desalination rate decreased 4.54% and 4.75%, and flux of NaCl decreased to 0.19mol/(m²·h) and 0.2mol/(m²·h), respectively. Moreover, transfer rate of SDBS and DDBAC were as high as 58.55% and 90.45%. Octyl phenol (OP-10) and thiobetaine (SB-12), typical non-ionic and amphoteric surfactants, had no significant effect on the electrodialysis system, and the membrane resistance, desalination rate and ion flux remained at the same level compared to the pure NaCl system. The experimental results revealed the influence mechanism of surfactant on electrodialysis performance, and laid the foundation on the wide application of electrodialysis in the field of reduction of industrial saline wastewater.

Key words: electrodialysis, surfactants, industrial saline wastewater, reduction

摘要：

目前表面活性剂对电渗析系统影响的研究不够具体。本文考察了表面活性剂类型对电渗析法减量化工业含盐废水的影响。结果表明：以十二烷基苯磺酸钠（SDBS）和十二烷基二甲基苄基氯化铵（DDBAC）为典型的阴离子型和阳离子型表面活性剂会对电渗析系统造成抑制效应，通过在膜表面形成污染层，导致膜电阻从4.72 Ω•cm²上升至30.46Ω•cm²和15.23Ω•cm²，从而降低浓缩倍数，相比纯氯化钠体系脱盐率分别下降4.54%和4.75%，通量下降了0.19mol/(m²·h)和0.2mol/(m²·h)，经济性降低，且SDBS和DDBAC的迁移率高达58.55%和90.45%。辛烷基苯酚（OP-10）和硫代甜菜碱（SB-12）为典型的非离子型和两性型表面活性剂，对电渗析系统没有明显的影响。相比纯氯化钠体系，膜电阻、脱盐率和离子通量均保持在同一水平。本实验揭示了表面活性剂对电渗析性能的影响机制，为电渗析法应用于工业含盐废水的减量化奠定了坚实的基础。

关键词: 电渗析, 表面活性剂, 工业含盐废水, 减量化

CLC Number:

X703

ZHAO Jingchao, TAN Ming. Effect of surfactants on the reduction of industrial saline wastewater by electrodialysis[J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 529-535.

赵景超, 谭明. 表面活性剂对电渗析减量化工业含盐废水的影响[J]. 化工进展, 2023, 42(S1): 529-535.

Figures/Tables 9

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体系类型	阳膜电阻/Ω•cm²	阴膜电阻/Ω•cm²
实验前	3.41	4.68
纯氯化钠	3.44	4.72
SDBS	3.45	30.46
DDBAC	15.23	4.71
OP-10	3.56	4.78
SB-12	3.53	4.66

体系类型	阳膜电阻/Ω•cm²	阴膜电阻/Ω•cm²
实验前	3.41	4.68
纯氯化钠	3.44	4.72
SDBS	3.45	30.46
DDBAC	15.23	4.71
OP-10	3.56	4.78
SB-12	3.53	4.66

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