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Title: Fouling behavior of isolated dissolved organic fractions from seawater in reverse osmosis (RO) desalination process
Authors: Yin, Wenqiang
Li, Xin
Suwarno, Stanislaus Raditya
Cornelissen, Emile R.
Chong, Tzyy Haur
Keywords: Engineering::Environmental engineering
Issue Date: 2019
Source: 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.
Journal: Water Research
Abstract: 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.
ISSN: 0043-1354
DOI: 10.1016/j.watres.2019.05.038
Rights: © 2019 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

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