Boron removal by reverse osmosis membranes in seawater desalination applications

Tu, Kha L.; Nghiem, Long D.; Chivas, Allan R.

doi:10.1016/j.seppur.2010.07.021

Cited by 258 publications

(123 citation statements)

References 82 publications

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“…The changes in boron rejection as a function of pH reported here are consistent with previous studies in the literature (e.g. [7,13]). …”

Section: Plain Boron and Polyol Rejectionsupporting

confidence: 92%

“…As a result, given the toxicity of boron to plant species as discussed above, almost all seawater desalination plants around the world are still required to target a boron level in the product water of well less than the current WHO guideline value [7].…”

Section: Introductionmentioning

confidence: 99%

“…Boron rejection by RO membranes is mostly governed by the membrane used, feed solution pH, operating pressure, temperature, and membrane fouling [7,[13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced boron rejection by NF/RO membranes by complexation with polyols: Measurement and mechanisms

Chivas

Nghiem

2013

Desalination

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Boron rejection by nanofiltration (NF) and reverse osmosis (RO) membranes in the presence of glycerol, mannitol and sorbitol was investigated as a function of feed solution pH and boron:polyol molar ratio. In the presence of polyols, significant boron rejection improvement was obtained and the extent of the impact was directly related to the stability constant of the boron-polyol complex. Polyols could complex with boron in either the boric acid or borate anion forms; however the complexation between polyol and boric acid appeared to be incomplete. With and without the presence of polyols, boron rejection was strongly pH dependent. The increase in boron rejection due to polyol addition was higher for the NF membrane compared to the RO membrane. A boron:polyol molar ratio of 1:1 appeared to be adequate. The presence of polyols did not cause any observable membrane fouling. Results reported here suggest that the addition of polyols could allow NF membranes to be effectively used for boron removal. AbstractBoron rejection by nanofiltration (NF) and reverse osmosis (RO) membranes in the presence of glycerol, mannitol and sorbitol was investigated as a function of feed solution pH and boron:polyol molar ratio. In the presence of polyols, significant boron rejection improvement was obtained and the extent of the impact was directly related to the stability constant of the boron-polyol complex. Polyols could complex with boron in either the boric acid or borate anion forms; however the complexation between polyol and boric acid appeared to be incomplete.With and without the presence of polyols, boron rejection was strongly pH dependent. The increase in boron rejection due to polyol addition was higher for the NF membrane compared to the RO membrane. A boron:polyol molar ratio of 1:1 appeared to be adequate. The presence of polyols did not cause any observable membrane fouling. Results reported here suggest that the addition of polyols could allow NF membranes to be effectively used for boron removal.

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“…The changes in boron rejection as a function of pH reported here are consistent with previous studies in the literature (e.g. [7,13]). …”

Section: Plain Boron and Polyol Rejectionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Enhanced boron rejection by NF/RO membranes by complexation with polyols: Measurement and mechanisms

Chivas

Nghiem

2013

Desalination

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“…Boron (B) removal is identified as one of the main issues in processes where saline water is treated, especially because its concentration in seawater, in particular, is relatively low [65]. Typical water treatment plants with source water containing boron, accommodate an RO pass at an elevated pH, where mainly removal of boron is targeted [66]. Therefore, its rejection profile is to be considered separately, with an RO unit dedicated to its removal.…”

Section: Rejection Coefficientmentioning

confidence: 99%

Optimal design of water treatment processes

Koleva

Polykarpou

Liu

et al. 2016

Desalination and Water Treatment

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Predicted water shortages assign water treatment a leading role in improving water resources management. One of the main challenges associated with the processes remains early stage design of techno-economically optimised purification. This work addresses the current gap by undertaking a whole-system approach of flowsheet synthesis for the production of water at desired purity at minimum overall cost. The optimisation problem was formulated as a mixed integer non-linear programming (MINLP) model. Two case studies were presented which incorporated the most common commercial technologies and the major pollution indicators, such as chemical oxygen demand (COD), dissolved organic carbon (DOC), total suspended solids (TSS) and total dissolved solids (TDS).The results were analysed and compared to existing guidelines in order to examine the applicability of the proposed approach.

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“…These are thin-film composite RO membranes with an active skin polyamide layer on top of a microporous polysulfone supporting layer, which was further supported by a polyester backing layer. The ESPA2 membrane is commonly used in water recycling applications (Fujioka et al, 2012), while the EPSAB has been used in the second stage of seawater desalination applications for boron removal (Tu et al, 2010).…”

Section: Ro Treatment Systemmentioning

confidence: 99%

A rapid and reliable technique for N -nitrosodimethylamine analysis in reclaimed water by HPLC-photochemical reaction-chemiluminescence

et al. 2016

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Kodamatani, H. (2016). A rapid and reliable technique for Nnitrosodimethylamine analysis in reclaimed water by HPLC-photochemical reaction-chemiluminescence. Chemosphere, 161 104-111. A rapid and reliable technique for N-nitrosodimethylamine analysis in reclaimed water by HPLC-photochemical reaction-chemiluminescence AbstractA fast and reliable analytical technique was evaluated and validated for determination of Nnitrosodimethylamine (NDMA) formation and rejection by reverse osmosis (RO) membranes in potable water reuse applications. The analytical instrument used in this study is high-performance liquid chromatography (HPLC), photochemical reaction (PR) and chemiluminescence (CL) e namely HPLC-PR-CL. Results reported here show that HPLC-PR-CL can be used to measure NDMA with a similar level of accuracy compared to conventional and more time-consuming techniques using gas chromatography and tandem mass spectrometry detection in combination with solid phase extraction. Among key residual chemicals (i.e. monochloramine, hydrogen peroxide and hypochlorite) in reclaimed wastewater, hypochlorite was the only constituent that interfered with the determination of NDMA by HPLC-PR-CL. However, hypochlorite interference was eliminated by adding ascorbic acid as a reducing agent. Direct injection of ultrafiltration (UF)-treated wastewater samples into HPLC-PR-CL also resulted in an underestimation of the NDMA concentration possibly due to interference by organic substances in the UF-treated wastewater. Accurate determination of NDMA concentrations in UF-treated wastewater was achieved by reducing the sample injection volume from 200 to 20 mL, though this increased the method detection limit from 0.2 to 2 ng/L. In contrast, no interference was observed with RO permeate. These results suggest that RO membranes could remove part of substances that interfere with the NDMA analysis by

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Boron removal by reverse osmosis membranes in seawater desalination applications

Cited by 258 publications

References 82 publications

Enhanced boron rejection by NF/RO membranes by complexation with polyols: Measurement and mechanisms

Enhanced boron rejection by NF/RO membranes by complexation with polyols: Measurement and mechanisms

Optimal design of water treatment processes

A rapid and reliable technique for N -nitrosodimethylamine analysis in reclaimed water by HPLC-photochemical reaction-chemiluminescence

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