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Study on the wetting mechanism of different types of surfactants in negative pressure membrane distillation

Authors： XIE Songchen, HOU Chunguang, PANG Zhiguang, YU Ziyu, YUE Dianhe, PENG Yuelian

Units： Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China

KeyWords： Surfactant; negative pressure membrane distillation; membrane wetting; membrane fouling; critical micelle concentration

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2024,44(1):8-15

Abstract：

Wetting due to surfactants was a major problem in membrane distillation when treating real wastewater. In order to alleviate membrane wetting, a negative pressure direct-contact membrane distillation (DCMD) process was used to evaluate the membrane performance when different surfactant saline solutions were the feed, and the wetting mechanism was analyzed through scanning electron microscopy, dynamic light scattering technology and other techniques. First, 0.1 mM SDS, CTAB, and Tween-20 surfactant saline solutions were respectively treated in a negative pressure DCMD. The results showed that when SDS saline solution was treated, the membrane flux was stable, and the permeate conductivity remained 3 µS/cm. For CTAB and Tween-20 saline solution, the membrane flux decayed and negative flux existed. By analyzing the foulant on the membrane surface and the micelle size in the solution, it was confirmed that cationic and nonionic surfactant micelles deposited and fouled the membrane surface, causing membrane wetting. In order to explore the relationship between membrane fouling and critical micelle concentration, saline solutions with 0.1CMC, 0.5CMC, 1.0CMC surfactant content were tested. The critical micelle concentrations (CMC) of SDS, CTAB, and Tween-20 were 9.6×10-3 mol/L, 9.1×10-5 mol/L and 6×10-5 mol/L, respectively. The results showed that the membrane flux remained stable when 9.1×10-6 mol/L CTAB (0.1CMC) and 6×10-6 mol/L Tween-20 (0.1CMC) saline solutions were treated. However, for SDS saline solution, the membrane flux decreased. The main reason was that the critical micelle concentration of SDS (9.6×10-3 mol/L) was two orders of magnitude higher than the other two surfactants, and it also had a higher hydrophilic-lipophilic balance value (40), 9.6×10-4 mol/L SDS (0.1CMC) saline solution had a lower surface tension (26.4 mN/m), leading to membrane wetting.

Funds：

国家自然科学基金项目（2187005)

AuthorIntro：

谢松辰（1996-），男，湖南郴州人，博士生，从事膜蒸馏中的膜结垢和润湿机理及预防策略研究，E-mail：305578024@qq.com

Reference：

[1] Chamani H, Woloszyn J, Matsuura T, et al. Pore wetting in membrane distillation: A comprehensive review[J]. Prog Mater Sci, 2021, 122:100843.
[2] Lou M, Fang X, Huang S, et al. Effect of cations on surfactant induced membrane wetting during membrane distillation[J]. Desalination, 2022, 532:115739.
[3] Chang J, Chang H, Meng Y, et al. Effects of surfactant types on membrane wetting and membrane hydrophobicity recovery in direct contact membrane distillation[J]. Sep Purif Technol, 2022, 301:122029.
[4] 谢松辰, 文剑平, 庞志广,等. 膜蒸馏脱盐中膜污染与膜润湿的研究进展[J]. 化工进展, 2021, 40(7):3942-3956.
[5] Velio?lu S, Han L, Chew J. Understanding membrane pore-wetting in the membrane distillation of oil emulsions via molecular dynamics simulations[J]. J Membr Sci, 2018, 551:76-84.
[6] Wang Z, Chen Y, Sun X, et al. Mechanism of pore wetting in membrane distillation with alcohol vs. surfactant[J]. J Membr Sci, 2018, 559:183-195.
[7] Han L, Tan Y, Netke T, et al. Understanding oily wastewater treatment via membrane distillation[J], J Membr Sci, 2017, 539:284-294.
[8] Tan Y, Velioglu S, Han L, et al. Effect of surfactant hydrophobicity and charge type on membrane distillation performance[J]. J Membr Sci, 2019, 587:117168.
[9] Wang Z, Chen Y, Lin S. Kinetic model for surfactant-induced pore wetting in membrane distillation[J]. J Membr Sci, 2018, 564:275-288.
[10] Wang Z, Chen Y, Zhang F, et al. Significance of surface excess concentration in the kinetics of surfactant-induced pore wetting in membrane distillation[J]. Desalination, 2019, 450:46-53.
[11] Xie S, Pang Z, Hou C, et al. One-step preparation of omniphobic membrane with concurrent anti-scaling and anti-wetting properties for membrane distillation[J]. J Membr Sci, 2022, 660:120846.
[12] Prasanna N, Choudhary N, Singh N, et al. Omniphobic membranes in membrane distillation for desalination applications: A mini-review[J]. Chem Eng J Advances, 2023, 14:100486.
[13] Lu K, Chen Y, Chung T. Design of omniphobic interfaces for membrane distillation - A review[J]. Water Res, 2019, 162:64-77.
[14] Liao X, Wang Y, Liao Y, et al. Effects of 119038different surfactant properties on anti-wetting behaviours of an omniphobic membrane in membrane distillation[J]. J Membr Sci, 2021, 634:119433.
[15] Zhang W, Hu B, Wang Z, et al. Fabrication of omniphobic PVDF composite membrane with dual-scale hierarchical structure via chemical bonding for robust membrane distillation[J]. J Membr Sci, 2021, 622:119038.
[16] Hou D, Yuan Z, Tang M, et al. Effect and mechanism of an anionic surfactant on membrane performance during direct contact membrane distillation[J]. J Membr Sci, 2020, 595:117495.
[17] Zhang X, Liao X, Shi M, et al. Guide to rational membrane selection for oily wastewater treatment by membrane distillation[J]. Desalination, 2023, 549:116323.
[18] Liu Y, Horseman T, Wang Z, et al. Negative Pressure Membrane Distillation for Excellent Gypsum Scaling Resistance and Flux Enhancement[J]. Environ Sci Technol, 2022, 56(2):1405-1412.
[19] Xie S, Hou G, Pang Z, et al. Anti-wetting memechanism of negative pressure mode in direct contact membrane distillation using hollow fiber membrane[J]. Desalination, 2024, 569:117033.
[20] Wang Y, Chen Y, Lin S, et al. Negative Pressure Membrane Distillation: A Novel Strategy for Wetting Mitigation[J]. Environ Sci Technol Lett, 2023, 10:52-58.
[21] Hobbs M. The effect of salts on the critical concentration, size, and stability of soap micelles[J]. J Phys Chem, 1951, 55:675-683.
[22] Chew N, Zhao S, Loh C, et al. Surfactant effects on water recovery from produced water via direct-contact membrane distillation[J]. J Membr Sci, 2017, 528:126-134.
[23] Kruglyakov P. Hydrophile-lipophile balance of surfactants and solid particles: physicochemical aspects and applications[M]// Elsevier, 2000.
[24] Eastoe J, Dalton J. Dynamic surface tension and adsorption mechanisms of surfactants at the air–water interface[J]. Adv Colloid Interface, 2000, 85:103-144.
[25] Chang H, Liu B, Zhang Z, et al. A critical review of membrane wettability in membrane distillation from the perspective of interfacial interactions[J]. Environ Sci Technol, 2020, 55:1395-1418.

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