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Title: Understanding the interaction between biomacromolecules and their influence on forward osmosis process
Authors: Arkhangelsky, Elizabeth
Wicaksana, Filicia
Al-Rabiah, Abdulrahman A.
Al-Zahrani, Saeed M.
Wang, Rong
Keywords: Combined organic fouling
Viscosity effect
Forward osmosis
Effect of divalent ions
Issue Date: 2016
Source: Arkhangelsky, E., Wicaksana, F., Al-Rabiah, A. A., Al-Zahrani, S. M., & Wang, R. (2016). Understanding the interaction between biomacromolecules and their influence on forward osmosis process. Desalination, 385, 12-23.
Series/Report no.: Desalination
Abstract: This paper presents studies on the interactions and effects of biomacromolecules compounds on forward osmosis (FO) membrane performance. Individual components and a combination of various organic substances such as bovine serum albumin (BSA), dextran, sodium alginate and xanthan gum were used as model feeds and tested for their influences on FO performance with the active layer of the FO hollow fiber membrane facing the feed solution (AL-FS). The interactions between foulants were examined by using fluorescence spectroscopy, rotational rheometry and laser doppler micro-electrophoresis techniques. For a system containing combined organic foulants, it was found that viscosity was not the dominant factor governing FO membrane fouling as the decrease in viscosity did not always result in less fouling. The effect of divalent cations on the FO fouling behavior was also studied by adding CaCl2. The presence of calcium ions has exacerbated the flux decline, this occurred particularly for any combined organic foulants containing alginate, due to intermolecular bridging among alginate molecules. It is interesting to note that combined BSA + alginate caused moderate flux decline, while BSA and alginate alone did not cause any observable water flux loss. The (BSA + alginate) fouling became more severe with the presence of calcium ions.
ISSN: 0011-9164
DOI: 10.1016/j.desal.2016.02.006
Schools: School of Civil and Environmental Engineering 
Research Centres: Singapore Membrane Technology Centre 
Rights: © 2016 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Desalination, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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