Characterizing algogenic organic matter (AOM) and evaluating associated NF membrane fouling

Her, Namguk; Amy, Gary L.; Park, Hyoung‐Ryun; Song, Myoung-Suk

doi:10.1016/j.watres.2003.12.008

Cited by 296 publications

(117 citation statements)

References 14 publications

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“…300 S/cm with KCl and the pH was adjusted to 7. The low value of the specific UV absorbance (SUVA) indicates that algal derived organic matter has a dominance of the hydrophilic fraction, a result in agreement with those of Her et al (2004) and Henderson et al (2008). On the other hand, Henderson´s characterisation of M. aeruginosa EOM points to an AOM solution most likely composed of two fractions: a high molar mass fraction (> 100 kDa), dominated by hydrophilic polysaccharides and hydrophobic proteins, and a low molar mass fraction (< 1 kDa).…”

Section: Feed Waterssupporting

confidence: 75%

“…EOM run resulted in a more severe membrane fouling than the AOM run, yielding a flux decline of 21% after 2 h of operation, somewhat higher than the AOM-driven flux decline (18%). Other authors have also obtained a high fouling potential of hydrophilic NOM, as that prevailing in AOM and EOM fractions (Table 2) (Her et al, 2004;Lee et al, 2006;Zularisam et al, 2007). Figure 9 presents NOM rejections with and without PAC addition.…”

Section: Aom Fouling Potential In Pac/ufmentioning

confidence: 74%

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PAC/UF for Removing Cyanobacterial Cells and Toxins from Drinking Water

Campinas¹,

Rosa²

2011

Expanding Issues in Desalination

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Section: Feed Waterssupporting

confidence: 75%

Section: Aom Fouling Potential In Pac/ufmentioning

confidence: 74%

PAC/UF for Removing Cyanobacterial Cells and Toxins from Drinking Water

Campinas¹,

Rosa²

2011

Expanding Issues in Desalination

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“…Baker [33] reported that that fulvic-like fluorescence occurs at E x = 320-340 and E m = 410-430 nm, and humic-like fluorescence occurs at E x = 370-390 and E m = 460-480 nm. Generally, humic-like substances exhibit a fluorescence intensity maximum at higher excitation/emission wavelengths compared to protein-like substance (maximum at lower excitation/emission wavelength [34]. Therefore, the aromatic protein-like substances can be inferred to have a very significant fouling potential.…”

Section: Three-dimensional Fluorescence Excitation-emission Matrix Spmentioning

confidence: 99%

Investigation of organic foulants behavior on hollow-fiber UF membranes in a drinking water treatment plant

Xiao

Wang

et al. 2012

Separation and Purification Technology

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a b s t r a c tIn the present work, a ultrafiltration (UF) low pressure membrane (LPM) made of polyvinyl chloride (PVC) was used with an inline poly-ferric sulfate coagulation in a full scale drinking water treatment plant. The organic foulants and their accumulation behavior in the membrane filtration were investigated during a whole year operation. The evolutions of the surface morphology of the membranes were characterized by scanning electronic microscopy (SEM) and atomic force microscopy (AFM). The results revealed that the cake layer and pore blocked were responsible for the flux declining. Moreover, the roughness of the surface of the membranes continuously increased with the filtration. In order to identify the constitutes of organic foulants, attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR), high pressure size exclusion chromatography (HPSEC) and fluorescence excitation-emission matrix (EEM) spectrometry were used to examine the desorbed organic matters from the fouled membranes. The results showed that humic substances kept a very stable situation, indicating that it would not be important in the formation of the combined organic fouling layer. Protein/protein-like substances and soluble microbial product-like (SMP-like) substances were the dominant components in the organic fouling layer in a long-term ultrafiltration of surface water used as a drinking water source. A decrease of protein/protein-like substances and an increase of SMP-like substances with the filtration time were found, which could be attributed to the transition from proteins to SMP in the fouling layer. Thus, the increase of SMP-like substances in the fouling layer would play a significant role on the accumulation of irreversible fouling.

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“…The relative proportions of these constituents may vary depending on species, age of culture and environmental conditions. The predominance of PS and PN in AOM results in its hydrophilic character [1,4,5]. Some species of algae produce high amounts of extracellular PS, which may constitute more than 80% of the overall AOM production [6].…”

Section: Introductionmentioning

confidence: 99%

Advanced characterization of dissolved organic matter released by bloom-forming marine algae

Rehman¹,

Jeong²,

Tabatabai³

et al. 2017

dwt

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a b s t r a c tAlgal organic matter (AOM), produced by marine phytoplankton during bloom periods, may adversely affect the performance of membrane processes in seawater desalination. The polysaccharide fraction of AOM has been related to (bio)fouling in micro-filtration and ultrafiltration, and reverse osmosis membranes. However, so far, the chemical structure of the polysaccharides released by bloom-forming algae is not well understood. In this study, dissolved fraction of AOM produced by three algal species (Chaetoceros affinis, Nitzschia epithemoides and Hymenomonas spp.) was characterized using liquid chromatography-organic carbon detection (LC-OCD) and fluorescence spectroscopy. Chemical structure of polysaccharides isolated from the AOM solutions at stationary phase was analyzed using proton nuclear magnetic resonance ( 1 H-NMR). The results showed that production and composition of dissolved AOM varied depending on algal species and their growth stage. AOM was mainly composed of biopolymers (BP; i.e., polysaccharides and proteins [PN]), but some refractory substances were also present. 1 H-NMR spectra confirmed the predominance of carbohydrates in all samples. Furthermore, similar fingerprints were observed for polysaccharides of two diatom species, which differed considerably from that of coccolithophores. Based on the findings of this study, 1 H-NMR could be used as a method for analyzing chemical profiles of algal polysaccharides to enhance the understanding of their impact on membrane fouling.

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Characterizing algogenic organic matter (AOM) and evaluating associated NF membrane fouling

Cited by 296 publications

References 14 publications

PAC/UF for Removing Cyanobacterial Cells and Toxins from Drinking Water

PAC/UF for Removing Cyanobacterial Cells and Toxins from Drinking Water

Investigation of organic foulants behavior on hollow-fiber UF membranes in a drinking water treatment plant

Advanced characterization of dissolved organic matter released by bloom-forming marine algae

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