A combined ion exchange-nanofiltration process for water desalination: II. Membrane selection

Nidal Hilal; Victor Kochkodan; Hasan Al Abdulgader; Daniel Johnson

doi:10.1016/j.desal.2014.11.017

A combined ion exchange-nanofiltration process for water desalination: II. Membrane selection

Nidal Hilal, Victor Kochkodan, Hasan Al Abdulgader, Daniel Johnson

Research output: Contribution to journal › Article › peer-review

Abstract

This paper discusses the performance of NF270, NF90, BW30 and SW30 (Dow/FilmTec) membranes during filtration of single and mixed NaCl and Na₂SO₄ solutions at different feed concentrations and NaCl to Na₂SO₄ ratios. The feeds represent the compositions of possible streams after IX treatment in a combined ion exchange (IX)-nanofiltration (NF) process of water desalination. The impact of total feed concentration, the NaCl/Na₂SO₄ ratio and feed pH on membranes flux and rejection of sulphate and chloride ions were determined. All membranes showed excellent rejection of sulphate ions, while chloride rejection largely varied for NF membranes with changes in feed concentration, composition and pH. A high negative rejection of chloride ions was observed with NF270 membrane during treatment of binary aqueous solution with a high Na₂SO₄ to NaCl ratio due to the Donnan effect.

Original language	English (US)
Pages (from-to)	51-57
Number of pages	7
Journal	Desalination
Volume	363
DOIs	https://doi.org/10.1016/j.desal.2014.11.017
State	Published - May 1 2015

Keywords

Binary NaCl/NaSO solutions
Chloride rejection
Desalination
Nanofiltration

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science
Water Science and Technology
Mechanical Engineering

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10.1016/j.desal.2014.11.017

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title = "A combined ion exchange-nanofiltration process for water desalination: II. Membrane selection",

abstract = "This paper discusses the performance of NF270, NF90, BW30 and SW30 (Dow/FilmTec) membranes during filtration of single and mixed NaCl and Na2SO4 solutions at different feed concentrations and NaCl to Na2SO4 ratios. The feeds represent the compositions of possible streams after IX treatment in a combined ion exchange (IX)-nanofiltration (NF) process of water desalination. The impact of total feed concentration, the NaCl/Na2SO4 ratio and feed pH on membranes flux and rejection of sulphate and chloride ions were determined. All membranes showed excellent rejection of sulphate ions, while chloride rejection largely varied for NF membranes with changes in feed concentration, composition and pH. A high negative rejection of chloride ions was observed with NF270 membrane during treatment of binary aqueous solution with a high Na2SO4 to NaCl ratio due to the Donnan effect.",

keywords = "Binary NaCl/NaSO solutions, Chloride rejection, Desalination, Nanofiltration",

author = "Nidal Hilal and Victor Kochkodan and {Al Abdulgader}, Hasan and Daniel Johnson",

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year = "2015",

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doi = "10.1016/j.desal.2014.11.017",

language = "English (US)",

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T1 - A combined ion exchange-nanofiltration process for water desalination

T2 - II. Membrane selection

AU - Hilal, Nidal

AU - Kochkodan, Victor

AU - Al Abdulgader, Hasan

AU - Johnson, Daniel

PY - 2015/5/1

Y1 - 2015/5/1

N2 - This paper discusses the performance of NF270, NF90, BW30 and SW30 (Dow/FilmTec) membranes during filtration of single and mixed NaCl and Na2SO4 solutions at different feed concentrations and NaCl to Na2SO4 ratios. The feeds represent the compositions of possible streams after IX treatment in a combined ion exchange (IX)-nanofiltration (NF) process of water desalination. The impact of total feed concentration, the NaCl/Na2SO4 ratio and feed pH on membranes flux and rejection of sulphate and chloride ions were determined. All membranes showed excellent rejection of sulphate ions, while chloride rejection largely varied for NF membranes with changes in feed concentration, composition and pH. A high negative rejection of chloride ions was observed with NF270 membrane during treatment of binary aqueous solution with a high Na2SO4 to NaCl ratio due to the Donnan effect.

AB - This paper discusses the performance of NF270, NF90, BW30 and SW30 (Dow/FilmTec) membranes during filtration of single and mixed NaCl and Na2SO4 solutions at different feed concentrations and NaCl to Na2SO4 ratios. The feeds represent the compositions of possible streams after IX treatment in a combined ion exchange (IX)-nanofiltration (NF) process of water desalination. The impact of total feed concentration, the NaCl/Na2SO4 ratio and feed pH on membranes flux and rejection of sulphate and chloride ions were determined. All membranes showed excellent rejection of sulphate ions, while chloride rejection largely varied for NF membranes with changes in feed concentration, composition and pH. A high negative rejection of chloride ions was observed with NF270 membrane during treatment of binary aqueous solution with a high Na2SO4 to NaCl ratio due to the Donnan effect.

KW - Binary NaCl/NaSO solutions

KW - Chloride rejection

KW - Desalination

KW - Nanofiltration

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DO - 10.1016/j.desal.2014.11.017

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JO - Desalination

JF - Desalination

ER -

A combined ion exchange-nanofiltration process for water desalination: II. Membrane selection

Abstract

Keywords

ASJC Scopus subject areas

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