Design of tropinium-functionalized anion exchange membranes for acid recovery via diffusion dialysis process

Diffusion dialysis (DD) process utilizing anion exchange membranes (AEMs) is an environmentally-friendly and energy-efficient technology. From acidic wastewater, DD is needed for acid recovery. This research reports the development of a series of dense tropinium-functionalized AEMs via solution casting method. Fourier Infrared transform (FTIR) spectroscopy verified the successful preparation of AEMs. The developed AEMs exhibited a dense morphology, featuring 0.98–2.42 mmol/g of ion exchange capacity (IEC), 30–81% of water uptake (WR) and 7–32% of linear swelling ratio (LSR). They displayed exceptional mechanical, thermal and chemical stability and were employed for acid waste treatment from HCl/FeCl2 mixtures via DD process. AEMs possessed 20 to 59 (10−3 m/h) and 166 to 362 of acid diffusion dialysis coefficient (UH+) and separation factor (S) respectively at 25 °C. Compared to DF-120 commercial membrane (UH+ = 0.004 m/h, S = 24.3), their DD efficiency was improved under identical experimental conditions. © 2023

Authors
Khan M.I. , Shanableh A. , Manzoor S. , Fernandez J. , Osman S.M. , Luque R.
Publisher
Academic Press Inc.
Language
English
Status
Published
Number
115932
Volume
229
Year
2023
Organizations
  • 1 Research Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah, 27272, United Arab Emirates
  • 2 Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan
  • 3 Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom
  • 4 IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, Barcelona, 08017, Spain
  • 5 Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
  • 6 Peoples Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., Moscow, 117198, Russian Federation
  • 7 Universidad ECOTEC, Km. 13.5 Samborondón, Samborondón, EC092302, Ecuador
Keywords
AEMs; BPPO; Diffusion dialysis; Tropine; Water uptake
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