Influence of natural organic matter on the deposition kinetics of extracellular polymeric substances (EPS) on silica

Tong, Meiping; Zhu, Pingting; Jiang, Xujia; Kim, Hyung-Seok

doi:10.1016/j.colsurfb.2011.05.015

Cited by 30 publications

(23 citation statements)

References 49 publications

(57 reference statements)

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“…The solid phase Hamaker constant and fraction on site 2 were varied from A s2 = 2.5 × 10 −20 to 10 × 10 −20 J and f s2 = 0 to 1 when considering heterogeneity in van der Waals interactions. This range in individual Hamaker constants encompassed reported values for humic acid, extracellular polymeric substances, and carbon black that are equal to 4.85 × 10 −20 , 7.78 × 10 −20 , 1 × 10 −19 J, respectively (Tong et al, 2011;Han et al, 2017). The solid phase contact angle and fraction on site 2 were varied from θ s2 = 0 to 125 • and f s2 = 0 to 1 when considering heterogeneity in Lewis acid-base interactions.…”

Section: Numerical Experimentsmentioning

confidence: 99%

“…The solid phase zeta potential and fraction on site 2 were varied from ζ s2 = −20 to +30 mV and f s2 = 0 to 1 when considering heterogeneity in electrostatic double layer interactions. This range in zeta potentials encompasses a wide range of minerals, metal oxide coatings, and humic materials (Fuerstenau and Pradip, 2005;Tong et al, 2011).…”

Section: Numerical Experimentsmentioning

confidence: 99%

“…The hydrophobicity of a surface is known to have a strong influence on the Lewis acid-base interaction (Bergendahl and Grasso, 1999). In addition, an increase in the presence of organic coatings is expected to reduce the Hamaker constant and the van der Waals interaction (Drummond and Chan, 1997;Tong et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Types and Amounts of Nanoscale Heterogeneity on Bacteria Retention

Bradford

Sasidharan

Kim

et al. 2018

Front. Environ. Sci.

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Interaction energy calculations that assume smooth and chemically homogeneous surfaces are commonly conducted to explain bacteria retention on solid surfaces, but experiments frequently exhibit signification deviations from these predictions. A potential explanation for these inconsistencies is the ubiquitous presence of nanoscale roughness (NR) and chemical heterogeneity (CH) arising from spatial variability in charge (CH1), Hamaker constant (CH2), and contact angles (CH3) on these surfaces. We present a method to determine the mean interaction energy between a colloid and a solid-water-interface (SWI) when both surfaces contained binary NR and CH. This approach accounts for double layer, van der Waals, Lewis acid-base, and Born interactions. We investigate the influence of NR and CH parameters and solution ionic strength (IS) on interaction energy profiles between hydrophilic and hydrophobic bacteria and the SWI. Increases in CH1 and CH3 reduce the energy barrier and create deeper primary minima on net electrostatically unfavorable surfaces, whereas increasing CH2 diminishes the contribution of the van der Waals interaction in comparison to quartz and makes a more repulsive surface. However, these roles of CH are always greatest on smooth surfaces with larger fractions of CH. In general, increasing CH1 and CH3 have a larger influence on bacteria retention under lower IS conditions, whereas the influence of increasing CH2 is more apparent under higher IS conditions. However, interaction energy profiles are mainly dominated by small fractions of NR, which dramatically lower the energy barrier height and the depths of both the secondary and primary minima. This significantly increases the relative importance of primary to secondary minima interactions on net electrostatically unfavorable surfaces, especially for conditions that produce small energy barriers on smooth surfaces. Energy balance calculations indicate that this primary minimum is sometimes susceptible to diffusive removal depending on the NR and CH parameters.

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Section: Numerical Experimentsmentioning

confidence: 99%

Section: Numerical Experimentsmentioning

confidence: 99%

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Comparison of Types and Amounts of Nanoscale Heterogeneity on Bacteria Retention

Bradford

Sasidharan

Kim

et al. 2018

Front. Environ. Sci.

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“…Since the coagulant agent is a protein, when the salt concentration increased, the solubility of the coagulant agent and hence its concentration in the solution also increased. The second phenomenon is the effect of salt (i.e., ionic strength) on particle aggregation [10,37]; in this case, an increase of salt concentration led to an intense particle aggregation due to the compression of the double layer. Moreover, according to Figure 3c, over the concentration of 0.5 M of NaCl, the turbidity removal efficiency decreased.…”

Section: Effect Of Coagulant Dosage On Turbidity Removal Efficiency Fmentioning

confidence: 99%

Use of Acorn Leaves as a Natural Coagulant in a Drinking Water Treatment Plant

Benalia

Derbal

Pánico

et al. 2018

Water

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In this study, the use of acorn leaves as a natural coagulant to reduce raw water turbidity and globally improve drinking water quality was investigated. The raw water was collected from a drinking water treatment plant located in Mila (Algeria) with an initial turbidity of 13.0 ± 0.1 NTU. To obtain acorn leaf powder as a coagulant, the acorn leaves were previously cleaned, washed with tap water, dried, ground and then finely sieved. To improve the coagulant activity and, consequently, the turbidity removal efficiency, the fine powder was also preliminarily treated with different solvents, as follows, in order to extract the coagulant agent: (i) distilled water; (ii) solutions of NaCl (0.25; 0.5 and 1 M); (iii) solutions of NaOH (0.025; 0.05 and 0.1 M); and (iv) solutions of HCl (0.025; 0.05 and 0.1 M). Standard Jar Test assays were conducted to evaluate the performance of the coagulant in the different considered operational conditions. Results of the study indicated that at low turbidity (e.g., 13.0 ± 0.1 NTU), the raw acorn leaf powder and those treated with distilled water (DW) were able to decrease the turbidity to 3.69 ± 0.06 and 1.97 ± 0.03 NTU, respectively. The use of sodium chloride solution (AC-NaCl) at 0.5 M resulted in a high turbidity removal efficiency (91.07%) compared to solutions with different concentrations (0.25 and 1 M). Concerning solutions of sodium hydroxide (AC-NaOH) and hydrogen chloride (AC-HCl), the lowest final turbidities of 1.83 ± 0.13 and 0.92 ± 0.02 NTU were obtained when the concentrations of the solutions were set at 0.05 and 0.1 M, respectively. Finally, in this study, other water quality parameters, such as total alkalinity hardness, pH, electrical conductivity and organic matters content, were measured to assess the coagulant performance on drinking water treatment.

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“…The mass fraction of EPS adsorbed by montmorillonite, kaolinite and goethite decreases as pH increases and ionic strength decreases (Cao et al, 2011;Lin et al, 2016a). By using quartz crystal microbalance with dissipation, Tong et al (2011) found that EPS deposition on silica surfaces is significantly higher than that on humic acid-coated silica surfaces, and much lower than that on alginate-coated silica surfaces. The preferential adsorption of proteins and lipids of EPS on goethite surfaces was observed by scanning transmission X-ray microscopy and high-resolution secondary ion mass spectrometry (Liu et al, 2013).…”

Section: Introductionmentioning

confidence: 98%

EPS adsorption to goethite: Molecular level adsorption mechanisms using 2D correlation spectroscopy

et al. 2018

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(P. Cai) with increasing concentration of electrolyte. The integrated results from ATR-FTIR and 2D-CoS allow us to construct a comprehensive overview of EPS-goethite interaction processes at the molecular level, which can be used to improve our understanding of EPS-mineral interactions in the natural environment. These results also provide fundamental information for a better understanding of bacterial biofilm formation on soil and sediment minerals, and facilitate research on the subsequent interaction of nutrients and contaminants with the reactive constituents of biofilms in natural and contaminated environments.

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Influence of natural organic matter on the deposition kinetics of extracellular polymeric substances (EPS) on silica

Cited by 30 publications

References 49 publications

Comparison of Types and Amounts of Nanoscale Heterogeneity on Bacteria Retention

Comparison of Types and Amounts of Nanoscale Heterogeneity on Bacteria Retention

Use of Acorn Leaves as a Natural Coagulant in a Drinking Water Treatment Plant

EPS adsorption to goethite: Molecular level adsorption mechanisms using 2D correlation spectroscopy

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