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

Muhammad Imran Khan; Abdallah Shanableh; Suryyia Manzoor; Javier Fernandez; Sameh M Osman; Rafael Luque

doi:10.1016/j.envres.2023.115932

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

Environ Res. 2023 Jul 15:229:115932. doi: 10.1016/j.envres.2023.115932. Epub 2023 Apr 17.

Authors

Muhammad Imran Khan¹, Abdallah Shanableh², Suryyia Manzoor³, Javier Fernandez⁴, Sameh M Osman⁵, Rafael Luque⁶

Affiliations

¹ Research Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah, 27272, United Arab Emirates. Electronic address: raoimranishaq@gmail.com.
² Research Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah, 27272, United Arab Emirates.
³ Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan.
⁴ Department of Chemical Engineering, University College London, Torrington Place, WC1E 7JE, London, UK; IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017, Barcelona, 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; Universidad ECOTEC, Km. 13.5 Samborondón, Samborondón, EC092302, Ecuador.

PMID: 37076029
DOI: 10.1016/j.envres.2023.115932

Abstract

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 (W_R) 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 (U_H⁺) and separation factor (S) respectively at 25 °C. Compared to DF-120 commercial membrane (U_H⁺ = 0.004 m/h, S = 24.3), their DD efficiency was improved under identical experimental conditions.

Keywords: AEMs; BPPO; Diffusion dialysis; Tropine; Water uptake.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anions
Dialysis / methods
Diffusion
Wastewater*

Substances

2-aminoethylmethyl sulfone
Anions
Wastewater