Abstract：
:Electrodialysis self-reversal (EDR) technology has attracted in the treatment of water for domestic and industrial uses. The self-reversal consists of a frequent reversal of the direction of current between the EDR-cell electrodes to combat fouling of ion exchange membranes (IEMs). Irrespective of the EDR self-cleaning processes, the role of natural organic matter and their complexing ability with metal ions on IEMs fouling is partially understood. The objective of this review is to identify the research gaps present in the elucidation of IEM fouling routes. The common IEMs' foulants are identified, and several fouling mechanisms are briefly discussed. The effectiveness of self-cleaning mechanisms to reduce IEMs fouling is also be discussed. Dissolved organic carbon (DOC) possesses high chelation which forms metal complexes with di and trivalent cations found in water. The role of ternary complexes, e.g. M2+/3+-DOC and membrane surface, on membrane fouling via surface bridging, are also addressed. Finally, mitigation methods of IEMs membrane fouling are also discussed.
journal_name
Chemospherejournal_title
Chemosphereauthors
Hansima MACK,Makehelwala M,Jinadasa KBSN,Wei Y,Nanayakkara KGN,Herath AC,Weerasooriya Rdoi
10.1016/j.chemosphere.2020.127951subject
Has Abstractpub_date
2021-01-01 00:00:00pages
127951eissn
0045-6535issn
1879-1298pii
S0045-6535(20)32146-9journal_volume
263pub_type
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