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Understanding boron rejection by reverse osmosis membranes

Authors
Choi, June-SeokCho, Jae-SeokLee, SanghoHwang, Tae-MunOh, HyunjeYang, Dae RyookKim, Joon Ha
Issue Date
Mar-2010
Publisher
DESALINATION PUBL
Keywords
Seawater desalination; Reverse osmosis; Boron; Rejection; Modeling
Citation
DESALINATION AND WATER TREATMENT, v.15, no.1-3, pp.129 - 133
Indexed
SCIE
SCOPUS
Journal Title
DESALINATION AND WATER TREATMENT
Volume
15
Number
1-3
Start Page
129
End Page
133
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/116901
DOI
10.5004/dwt.2010.1676
ISSN
1944-3994
Abstract
Reverse osmosis (RO) membranes have high rejection for most of solutes in seawater except for boron. Therefore, boron rejection should be considered in the design and operation of the RO process for seawater desalination. In this paper, we investigated boron rejection and its relation to salt rejection using an irreversible thermodynamic model. Permeability constants for commercially-available RO membranes were obtained using theoretical model and the simulation data from membrane performance test program provided by membrane manufacturers. The effect of pH and concentration of the feed water on the boron rejection was also theoretically investigated under various operating conditions. The model calculations revealed that the rejection of boron follows a different mechanism from those of other ionic solutes and could not be readily correlated with ion rejections. To overcome the limit of mechanistic models, we explored an alternative approach for predicting boron permeability from membrane properties and ion permeability. It appears that this alternative
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