Ultrafiltration pre-oxidation by boron-doped diamond anode for algae-laden water treatment: membrane fouling mitigation, interface characteristics and cake layer organic release

Liu, Bin; Zhu, Tingting; Liu, Wenkai; Zhou, Rui; Zhou, Shiqing; Wu, Ruoxi; Deng, Lin; Wang, Jing; Bruggen, Bart Van der

doi:10.1016/j.watres.2020.116435

Cited by 74 publications

(24 citation statements)

References 42 publications

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“…It should be pointed out that results obtained for zeta potential did not show any trend in groundwater samples after preoxidation. As for surface water, although there is unavailable data for the highest hydrogen peroxide tested concentration and a lower value was found at 10 mg L À1 H 2 O 2 , the decrease in absolute zeta potential obtained at 5 mg L À1 is suggestive of a reduction in negative charge density of organic matter, a behavior reported in preoxidation literature (Liu et al 2020). This encourages further research, because, additionally, in the presence of metals such as iron or manganese, preoxidation may cause a rupture in complexes of the metallic ions, resulting in an in-situ production of coagulant (Xie et al 2016).…”

Section: Water Clarificationmentioning

confidence: 59%

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Effects of hydrogen peroxide preoxidation on clarification and reduction of the microbial load of groundwater and surface water sources for household treatment

et al. 2021

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Household water treatment (HWT) technologies are a promising strategy for addressing the waterborne diseases burden. However, in order to be efficient, these are often limited to water quality and require it to not exceed a certain threshold of physicochemical and microbiological contamination. Additionally, some popular HWTs, as chlorination, are related to by-product formation. Preoxidation may improve source water quality, and hydrogen peroxide (H2O2) is an oxidant that has not been deeply explored in this specific application, so it could be an innovative approach to HWTs. We investigated effects of H2O2 preoxidation in two natural source waters (surface and groundwater), spiked with a high level of microorganisms. Clarification results suggested this pretreatment may improve life of HWTs. Reduction in microbial load of groundwater was considered ineffective, but 5-min H2O2 preoxidation at 15 mg L−1 led to >4.0 log10 inactivation of Phi X174 coliphage and >3.0 of Escherichia coli in surface water. We believe this performance was increased due to the presence of catalysts in the river water. This raised the point that water quality may be not only impairing, but potentially beneficial to the main HWT and characterization is crucial prior to the implementation of any technologies.

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Section: Water Clarificationmentioning

confidence: 59%

“…Here, we chose a short exposure time, as a conservative approach, i.e. worst scenario for a household setting, considering preoxidation experiments might range from five up to 100 minutes (Lv et al 2019;Liu et al 2020), depending on the matrix, goal, and available conditions.…”

Section: Experimental Designmentioning

confidence: 99%

Effects of hydrogen peroxide preoxidation on clarification and reduction of the microbial load of groundwater and surface water sources for household treatment

et al. 2021

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“…Polyvinylidene fluoride (PVDF), attributed with excellent chemical stability and engineering processability, has been used as one of the preferred materials to prepare polymeric membranes for water and wastewater treatment [1]. However, the strong intrinsic hydrophobicity of the PVDF material often causes membranes with severe organic fouling, a phenomenon of rapid and often irreversible loss in the permeate flux [2][3][4], which has greatly limited their prospect for more widespread applications [5][6][7]. Organic foulants can tightly attach to the external or internal surfaces of the membranes (due to some extent of physicochemical interactions) and not be easily or effectively removed by simple physical cleaning (such as water washing), leading to the use of more expensive and even tedious chemical cleaning strategy [8,9].…”

Section: Introductionmentioning

confidence: 99%

Highly Effective Anti-Organic Fouling Performance of a Modified PVDF Membrane Using a Triple-Component Copolymer of P(Stx-co-MAAy)-g-fPEGz as the Additive

et al. 2021

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In this study, a triple-component copolymer of P(Stx-co-MAAy)-g-fPEGz containing hydrophobic (styrene, St), hydrophilic (methacrylic acid, MAA), and oleophobic (perfluoroalkyl polyethylene glycol, fPEG) segments was synthesized and used as an additive polymer to prepare modified PVDF membrane for enhanced anti-fouling performance. Two compositions of St:MAA at 4:1 and 1:1 for the additive and two blending ratios of the additive:PVDF at 1:9 and 3:7 for the modified membranes were specifically examined. The results showed that the presence of the copolymer additive greatly affected the morphology and performance of the modified PVDF membranes. Especially, in a lower ratio of St to MAA (e.g., St:MAA at 1:1 versus 4:1), the additive polymer and therefore the modified PVDF membrane exhibited both better hydrophilic as well as oleophobic surface property. The prepared membrane can achieve a water contact angle at as low as 48.80° and display an underwater oil contact angle at as high as 160°. Adsorption experiments showed that BSA adsorption (in the concentration range of 0.8 to 2 g/L) on the modified PVDF membrane can be reduced by as much as 93%. From the filtration of BSA solution, HA solution, and oil/water emulsion, it was confirmed that the obtained membrane showed excellent resistance to these organic foulants that are often considered challenging in membrane water treatment. The performance displayed slow flux decay during filtration and high flux recovery after simple water cleaning. The developed membrane can therefore have a good potential to be used in such applications as water and wastewater treatment where protein and other organic pollutants (including oils) may cause severe fouling problems to conventional polymeric membranes.

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“…[4][5][6][7] However, more widespread use of UF membranes is currently limited because of unacceptable levels of membrane fouling, which can rapidly reduce performance and increase maintenance costs. [8][9][10][11] Primarily, UF membrane fouling is caused by the adsorption and deposition of proteins and biomacromolecules on the membrane surfaces and within its pores, which leads to drastic decline in water flux, shortened operating life and higher system costs. [12][13][14][15] Different types of polymers are used to prepare UF membranes, where polyvinylidene fluoride (PVDF) is a very common one due to its excellent chemical and thermal stability, high mechanical strength, and resistance against oxidation and corrosive me-dia.…”

Section: Introductionmentioning

confidence: 99%

Anti-Fouling Performance of Mixed Matrix PVDF Membranes with Mono-Hydroxyl Poly(dimethylsiloxane) (PDMS-OH) Grafted Silica Nanoparticles

AL-SHAELI¹,

Smith

Jiang

et al. 2021

Preprint

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In this study, we investigate the use of surface-modified silica nanoparticles to improve the anti-fouling performance of PVDF ultrafiltration membranes. Here, fouling resistant nanoparticles were prepared by grafting monohydroxy-polydimethylsiloxane onto the surface of silica nanoparticles using Steglich esterification. The mixed matrix PVDF membranes were prepared at a range of nanoparticle concentrations (0, 1.6, 3.2, 6.3, and 11.8%) to understand how PDMS modified silica content affected membrane performance. The resulting hybrid membranes were characterised using a range of techniques including scanning electron microscopy (SEM), water contact angle (CA), porosity, and pore size measurements, in order to determine how morphological features of the nanocomposite membranes affected fouling and pure water flux. Embedding silica nanoparticles resulted in a significant reduction in membrane fouling, including lower protein adsorption and a flux recovery ratio of 97 %. Although water flux was reduced by the addition of nanoparticles, the change in the porosity, mean pore size and the hydrophilicity of the membrane caused the rejection rate to be increased significantly. Together, these results are of particular benefit to the ultrafiltration industry, where improved antifouling and flux recovery can help reduce operating and maintenance costs in these membrane processes.<br /><br />

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Ultrafiltration pre-oxidation by boron-doped diamond anode for algae-laden water treatment: membrane fouling mitigation, interface characteristics and cake layer organic release

Cited by 74 publications

References 42 publications

Effects of hydrogen peroxide preoxidation on clarification and reduction of the microbial load of groundwater and surface water sources for household treatment

Effects of hydrogen peroxide preoxidation on clarification and reduction of the microbial load of groundwater and surface water sources for household treatment

Highly Effective Anti-Organic Fouling Performance of a Modified PVDF Membrane Using a Triple-Component Copolymer of P(Stx-co-MAAy)-g-fPEGz as the Additive

Anti-Fouling Performance of Mixed Matrix PVDF Membranes with Mono-Hydroxyl Poly(dimethylsiloxane) (PDMS-OH) Grafted Silica Nanoparticles

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