Contribution of effluent organic matter (EfOM) to ultrafiltration (UF) membrane fouling: Isolation, characterization, and fouling effect of EfOM fractions

Zheng, Xing; Khan, Muhammad Tariq; Croué, Jean-Philippe

doi:10.1016/j.watres.2014.07.039

Cited by 126 publications

(66 citation statements)

References 36 publications

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“…The EPM of River humic, WW humic, and WW colloids were negative throughout the entire range of Na + concentration tested (Figure 1a). This negative charge would be the results of ionized carboxyl groups present on the structure of the OM samples 20,21,30 as evidenced in previous characterization studies. 20,21 In addition, with increasing Na + concentration, the EPM of the three OM samples became less negative, suggesting charge screening (i.e., compression of diffuse double layer) due to interactions with indifferent Na + cations.…”

Section: Electrophoretic Mobility Measurementsmentioning

confidence: 64%

“…This negative charge would be the results of ionized carboxyl groups present on the structure of the OM samples 20,21,30 as evidenced in previous characterization studies. 20,21 In addition, with increasing Na + concentration, the EPM of the three OM samples became less negative, suggesting charge screening (i.e., compression of diffuse double layer) due to interactions with indifferent Na + cations. River humic and WW humic displayed a considerably higher negative charge than WW colloids at every solution condition tested due to their higher abundance of carboxyl groups in their structures, 20,21 and were consistent with previous investigations.…”

Section: Electrophoretic Mobility Measurementsmentioning

confidence: 64%

“…20,21 In addition, with increasing Na + concentration, the EPM of the three OM samples became less negative, suggesting charge screening (i.e., compression of diffuse double layer) due to interactions with indifferent Na + cations. River humic and WW humic displayed a considerably higher negative charge than WW colloids at every solution condition tested due to their higher abundance of carboxyl groups in their structures, 20,21 and were consistent with previous investigations. 19 In Ca 2+ solutions, the charge of the three OM isolates were significantly reduced compared to those in Na + solutions (Figure 1b).…”

Section: Electrophoretic Mobility Measurementsmentioning

confidence: 97%

“…20 Briefly, WW humic (i.e., hydrophobic acids) was found rich in carboxylic and aromatic ring structures. The presence of sulfonic groups associated to carboxyl moieties was also detected in this fraction, while signals of proteins or carbohydrates were almost absent in 13 C-NMR and FT-IR spectra.…”

Section: Effluent Organic Matter Isolates: Origin Characteristics Amentioning

confidence: 99%

“…A previous rigorous characterization showed that WW humic and River humic are rich in carboxylic and aromatic ring structures. 20 However, a larger presence of sulfonic groups associated to carboxyl moieties (i.e., possibly derived from detergents) and also a larger content of lipids/fatty acids (i.e., clearly identified from FT-IR spectra and possibly originating form strong biological activity in aerobic sludge reactors) were detected in WW humic.…”

Section: Aggregation Kinetic Of Citrate-coated Agnps In Om-containingmentioning

confidence: 99%

See 4 more Smart Citations

Citrate-Coated Silver Nanoparticles Interactions with Effluent Organic Matter: Influence of Capping Agent and Solution Conditions

Gutierrez

Aubry²,

Cornejo

et al. 2015

Langmuir

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Just Accepted "Just Accepted" manuscripts have been peer-reviewed and accepted for publication. They are posted online prior to technical editing, formatting for publication and author proofing. The American Chemical Society provides "Just Accepted" as a free service to the research community to expedite the dissemination of scientific material as soon as possible after acceptance. "Just Accepted" manuscripts appear in full in PDF format accompanied by an HTML abstract. "Just Accepted" manuscripts have been fully peer reviewed, but should not be considered the official version of record. They are accessible to all readers and citable by the Digital Object Identifier (DOI®). "Just Accepted" is an optional service offered to authors. Therefore, the "Just Accepted" Web site may not include all articles that will be published in the journal. After a manuscript is technically edited and formatted, it will be removed from the "Just Accepted" Web site and published as an ASAP article. Note that technical editing may introduce minor changes to the manuscript text and/or graphics which could affect content, and all legal disclaimers and ethical guidelines that apply to the journal pertain. ACS cannot be held responsible for errors or consequences arising from the use of information contained in these "Just Accepted" manuscripts. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 Abstract: Fate and transport studies of silver nanoparticles (AgNPs) discharged from urban wastewaters containing effluent organic matter (EfOM) into natural waters represent a key knowledge gap. In this study, EfOM interfacial interactions with AgNPs and their aggregation kinetics were investigated by atomic force microscopy (AFM) and time-resolved dynamic light scattering (TR-DLS), respectively. Two well-characterized EfOM isolates, i.e., wastewater humic (WW humic) and wastewater colloids (WW colloids, a complex mixture of polysaccharides-proteins-lipids), and a River humic isolate of different characteristics were selected. Citrate-coated AgNPs were selected as representative capped-AgNPs. Citrate-coated AgNPs showed a considerable stability in Na + solutions. However, Ca 2+ ions induced aggregation by cation bridging between carboxyl groups on citrate. Although the presence of River humic increased the stability of citrate-coated AgNPs in Na + solutions due to electrosteric effects, they aggregated in WW humic-containing solutions, indicating the importance of humics characteristics during interactions. Ca 2+ ions increased citrate-coated AgNPs aggregation rates in both humic solutions, suggesting cation bridging between carboxyl groups on their structures as a dominant interacting mechanism. Aggregation of citrate-coated AgNPs in WW colloids solutions was significantly faster than those in both humic solutions. Control experiments in urea solution indicated hydr...

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Section: Electrophoretic Mobility Measurementsmentioning

confidence: 64%

Section: Electrophoretic Mobility Measurementsmentioning

confidence: 64%

Section: Electrophoretic Mobility Measurementsmentioning

confidence: 97%

Section: Effluent Organic Matter Isolates: Origin Characteristics Amentioning

confidence: 99%

Section: Aggregation Kinetic Of Citrate-coated Agnps In Om-containingmentioning

confidence: 99%

See 3 more Smart Citations

Citrate-Coated Silver Nanoparticles Interactions with Effluent Organic Matter: Influence of Capping Agent and Solution Conditions

Gutierrez

Aubry²,

Cornejo

et al. 2015

Langmuir

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Fractionation of secondary effluents of wastewater treatment plants in view of the evaluation of membrane fouling in a further ultrafiltration step

Ferrer‐Polonio

McCabe

Mendoza–Roca

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Ultrafiltration is used as tertiary treatment in wastewater treatment plants (WWTP) for wastewater reclamation. However, membrane fouling is the main drawback of the process. In this work a new effluent organic matter fractionation procedure with adsorption resins (XAD‐8, XAD4 and IRA‐958) has been applied without recovering the adsorbed fractions. In this way, strong and weak hydrophobic and charged hydrophilic substances of the dissolved organic matter (DOM) were removed for further ultrafiltration, in order to know the most fouling fraction. For this, secondary effluents of two WWTP and two membranes with different molecular weight cut‐offs (100 kDa and 3 kDa) were used in ultrafiltration experiments in a laboratory plant. RESULTS The hydrophobic substances (especially the strong hydrophobics) predominated over the hydrophilic compounds. Membrane fouling was higher for the membrane with the highest molecular weight cut‐off (100 kDa). Thus, flux decline was around 25–47% higher than that measured for the 3 kDa membrane. The charged hydrophilic substances (CHi) were identified as the most fouling compounds with 100 kDa membrane. Reversible fouling was predominant. CONCLUSIONS The proposed fractionation system enabled determination of the contribution of the different fractions to the DOM. © 2017 Society of Chemical Industry

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Influence of Diverse Urban Pressures on Water Characteristics in a Small Eastern Mediterranean Watershed

et al. 2022

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Contribution of effluent organic matter (EfOM) to ultrafiltration (UF) membrane fouling: Isolation, characterization, and fouling effect of EfOM fractions

Cited by 126 publications

References 36 publications

Citrate-Coated Silver Nanoparticles Interactions with Effluent Organic Matter: Influence of Capping Agent and Solution Conditions

Citrate-Coated Silver Nanoparticles Interactions with Effluent Organic Matter: Influence of Capping Agent and Solution Conditions

Fractionation of secondary effluents of wastewater treatment plants in view of the evaluation of membrane fouling in a further ultrafiltration step

Influence of Diverse Urban Pressures on Water Characteristics in a Small Eastern Mediterranean Watershed

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