Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process

Organic fouling is still elusive in seawater reverse osmosis (SWRO) desalination process. Classifying organics in seawater will provide an in-depth understanding of the important fraction on RO fouling. In this study, dissolved organic matter (DOM) in seawater was fractionated and concentrated by me...

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Main Authors: Yin, Wenqiang, Li, Xin, Suwarno, Stanislaus Raditya, Cornelissen, Emile R., Chong, Tzyy Haur
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/151705
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1517052021-06-24T06:35:00Z Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process Yin, Wenqiang Li, Xin Suwarno, Stanislaus Raditya Cornelissen, Emile R. Chong, Tzyy Haur School of Civil and Environmental Engineering Singapore Membrane Technology Centre Nanyang Environment and Water Research Institute Engineering::Environmental engineering Membrane Fouling Seawater Organic fouling is still elusive in seawater reverse osmosis (SWRO) desalination process. Classifying organics in seawater will provide an in-depth understanding of the important fraction on RO fouling. In this study, dissolved organic matter (DOM) in seawater was fractionated and concentrated by membrane technique into three major fractions (i.e., biopolymer fraction, humic substance with building block fraction, and low molecular weight fraction) by their molecular weight (MW) according to the definitions in liquid chromatography with organic carbon detection (LC-OCD) method. Overall recovery of >80% was attained. The isolated organic fractions were compared with common model foulants such as sodium alginate (SA), bovine serum albumin (BSA), and humic acid (HA), in terms of chemical analyses using fluorescence-excitation emission matrix (FEEM) and LC-OCD, as well as their fouling potentials. SWRO fouling experiments were carried out and fouling mechanism was investigated by atomic force microscopy (AFM) method and extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory. Results showed that initial fouling (i.e., foulant-membrane interaction) was the main driver in SWRO organic fouling with biopolymer fraction as the major contributor followed by low molecular weight fraction. In addition, divalent ions was found to enhance the RO fouling by increasing the adhesion and cohesion forces between foulant-membrane and foulant-foulant. The funding support from the Economic Development Board of Singapore to Singapore Membrane Technology Centre (SMTC) is acknowledged. The authors would like to thank PUB, Singapore's National Water Agency, for access to seawater samples. 2021-06-24T06:35:00Z 2021-06-24T06:35:00Z 2019 Journal Article Yin, W., Li, X., Suwarno, S. R., Cornelissen, E. R. & Chong, T. H. (2019). Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process. Water Research, 159, 385-396. https://dx.doi.org/10.1016/j.watres.2019.05.038 0043-1354 0000-0002-1387-7464 https://hdl.handle.net/10356/151705 10.1016/j.watres.2019.05.038 31121406 2-s2.0-85065772805 159 385 396 en Water Research © 2019 Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Environmental engineering
Membrane Fouling
Seawater
spellingShingle Engineering::Environmental engineering
Membrane Fouling
Seawater
Yin, Wenqiang
Li, Xin
Suwarno, Stanislaus Raditya
Cornelissen, Emile R.
Chong, Tzyy Haur
Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process
description Organic fouling is still elusive in seawater reverse osmosis (SWRO) desalination process. Classifying organics in seawater will provide an in-depth understanding of the important fraction on RO fouling. In this study, dissolved organic matter (DOM) in seawater was fractionated and concentrated by membrane technique into three major fractions (i.e., biopolymer fraction, humic substance with building block fraction, and low molecular weight fraction) by their molecular weight (MW) according to the definitions in liquid chromatography with organic carbon detection (LC-OCD) method. Overall recovery of >80% was attained. The isolated organic fractions were compared with common model foulants such as sodium alginate (SA), bovine serum albumin (BSA), and humic acid (HA), in terms of chemical analyses using fluorescence-excitation emission matrix (FEEM) and LC-OCD, as well as their fouling potentials. SWRO fouling experiments were carried out and fouling mechanism was investigated by atomic force microscopy (AFM) method and extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory. Results showed that initial fouling (i.e., foulant-membrane interaction) was the main driver in SWRO organic fouling with biopolymer fraction as the major contributor followed by low molecular weight fraction. In addition, divalent ions was found to enhance the RO fouling by increasing the adhesion and cohesion forces between foulant-membrane and foulant-foulant.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Yin, Wenqiang
Li, Xin
Suwarno, Stanislaus Raditya
Cornelissen, Emile R.
Chong, Tzyy Haur
format Article
author Yin, Wenqiang
Li, Xin
Suwarno, Stanislaus Raditya
Cornelissen, Emile R.
Chong, Tzyy Haur
author_sort Yin, Wenqiang
title Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process
title_short Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process
title_full Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process
title_fullStr Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process
title_full_unstemmed Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process
title_sort fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (ro) desalination process
publishDate 2021
url https://hdl.handle.net/10356/151705
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