Separation performance of ultrafiltration during the treatment of algae-laden water in the presence of an anionic surfactant

Zhu, Tingting; Zhou, Zhun; Qu, Fangshu; Liu, Bin; Bruggen, Bart Van der

doi:10.1016/j.seppur.2021.119894

Cited by 46 publications

(14 citation statements)

References 47 publications

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“…Second, the SDZ rejection ratio of LPP10 remained basically constant from the beginning to the final filtration period, which suggests that the SDZ degradation was the dominant SDZ rejection mechanism as the adsorption usually occurred during the initial filtration period. 20 The rejection of the membranes for SDZ without PMS activation was all less than 5%, which suggests that the retention and adsorption of SDZ on the membrane were negligible.…”

Section: Characterization and Morphology Of The Fabricated Membranementioning

confidence: 95%

“…A polyethersulfone (PES) flat sheet membrane acquired from Microdyn-Nadir GmbH with a 50 kDa molecular weight cutoff was employed as the supporting film. The pristine PES membrane was submerged in DI water for 24 h (DI water changed every 2 h) to thoroughly remove the pore-protective liquid before the fabrication process . All chemical reagents used during the membrane fabrication process were purchased from Sigma-Aldrich company unless otherwise mentioned.…”

Section: Methodsmentioning

confidence: 99%

“…The pristine PES membrane was submerged in DI water for 24 h (DI water changed every 2 h) to thoroughly remove the pore-protective liquid before the fabrication process. 20 All chemical reagents used during the membrane fabrication process were purchased from Sigma-Aldrich company unless otherwise mentioned.…”

Section: Membrane Fabrication Protocolmentioning

confidence: 99%

“…Theoretically, the flow rate through the membrane determines the catalytic efficiency of the catalyst-assisted membrane system. Hence, the optimum permeability is decisive for the application of the system. , Loose nanofiltration is a separation method with a molecular weight cut-off (MWCO) between those of nanofiltration and ultrafiltration (usually between 500 and 2000 Da), which is broadly used in the separation of species with a target molecular weight including some dyes and multivalent salts. , Therefore, whether PMS-based catalytic loose nanofiltration can yield superior performance is of great significance for expanding the application range of catalyst-assisted membranes.…”

Section: Introductionmentioning

confidence: 99%

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Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Liu

Xue

et al. 2022

ACS EST Water

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In this study, a Prussian blue analogue (PBA)-intercalated magnesium aluminum hydrotalcite (PBA–LDH) material was used to successfully modify the membrane surface by layer-by-layer synthesis with an intermediate layer inspired by dopamine polymerization (polydopamine (PDA)). The PBA–LDH@PDA membrane was endowed with highly efficient peroxymonosulfate (PMS) activation and superb antifouling properties. Quenching experiments implied that SO4 •– mainly contributed to the sulfadiazine (SDZ) degradation in the PBA–LDH@PDA membrane-activated PMS system and performed well under various conditions. On the other hand, the PBA–LDH@PDA membrane was confirmed to exhibit separation by loose nanofiltration. The fouling performance of the membrane identified an extremely low flux attenuation even when 60 mg/L bovine serum albumin (BSA) was filtered. Multicycle filtration experiments demonstrated extremely low fouling accumulation of the membrane. The loose nanofiltration membrane with PMS activation properties possesses multiple advantages: activation of PMS by the filtration process provides a space in which the catalyst, oxidant, and foulant can completely react; the two goals of fouling mitigation and target foulant removal can be mutually realized by controlling the operating parameters (e.g., PMS dosage and filtration pressure). Overall, this study provides a beneficial strategy for improving the efficiency of membrane filtration and foulant removal.

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Section: Characterization and Morphology Of The Fabricated Membranementioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

Section: Membrane Fabrication Protocolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Liu

Xue

et al. 2022

ACS EST Water

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“…At present, the methods for removing NOM include coagulation [8,9], adsorption [10], advanced oxidation [11], and membrane separation technology [12,13]. However, these methods each have their own shortcomings or application limitations.…”

Section: Introductionmentioning

confidence: 99%

Alleviation of Ultrafiltration Membrane Fouling by ClO2 Pre-Oxidation: Fouling Mechanism and Interface Characteristics

et al. 2022

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In order to alleviate membrane fouling and improve removal efficiency, a series of pretreatment technologies were applied to the ultrafiltration process. In this study, ClO2 was used as a pre-oxidation strategy for the ultrafiltration (UF) process. Humic acid (HA), sodium alginate (SA), and bovine serum albumin (BSA) were used as three typical organic model foulants, and the mixture of the three substances was used as a representation of simulated natural water. The dosages of ClO2 were 0.5, 1, 2, 4, and 8 mg/L, with 90 min pre-oxidation. The results showed that ClO2 pre-oxidation at low doses (1–2 mg/L) could alleviate the membrane flux decline caused by humus, polysaccharides, and simulated natural water, but had a limited alleviating effect on the irreversible resistance of the membrane. The interfacial free energy analysis showed that the interaction force between the membrane and the simulated natural water was also repulsive after the pre-oxidation, indicating that ClO2 pre-oxidation was an effective way to alleviate cake layer fouling by reducing the interaction between the foulant and the membrane. In addition, ClO2 oxidation activated the hidden functional groups in the raw water, resulting in an increase in the fluorescence value of humic analogs, but had a good removal effect on the fluorescence intensity of BSA. Furthermore, the membrane fouling fitting model showed that ClO2, at a low dose (1 mg/L), could change the mechanism of membrane fouling induced by simulated natural water from standard blocking and cake layer blocking to critical blocking. Overall, ClO2 pre-oxidation was an efficient pretreatment strategy for UF membrane fouling alleviation, especially for the fouling control of HA and SA at low dosages.

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Optimizing Synthesis of Anionic Surfactant‐Modified Carbon Black for Enhanced Ammonium Adsorption

Mohamed,

Ngadi,

Rushdan

et al. 2024

ChemNanoMat

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The increasing levels of ammonium in wastewater pose serious environmental issues, highlighting the urgent need for effective adsorbents to facilitate its removal. Although conventional biological treatment methods have certain drawbacks, adsorption using carbonaceous materials, such as carbon black produced from waste tires, presents a promising alternative for ammonium removal. However, the use of these materials has not been thoroughly investigated. This study focuses on optimizing the synthesis of carbon black modified with anionic surfactants to improve its capacity for ammonium adsorption. Utilizing Response Surface Methodology (RSM) and a Box‐Behnken design, the optimization process examined key variables, including reaction time, surfactant concentration, carbon black dosage, and surfactant type. Comprehensive characterization of the adsorbent was conducted to analyze its surface properties, functional groups, morphology, and elemental composition. The regression models produced highly accurate results with an R2 value of 0.9437. The optimal synthesis conditions were identified as a 12.30‐hour reaction time, a surfactant concentration of 8 mmol/L of sodium dodecylbenzene sulfonate, and a carbon black dosage of 30 g, achieving an ammonium removal efficiency of 84.80%. This study offers a scalable solution for ammonium removal in wastewater, promising practical applications and future sustainable waste management research.

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Separation performance of ultrafiltration during the treatment of algae-laden water in the presence of an anionic surfactant

Cited by 46 publications

References 47 publications

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Alleviation of Ultrafiltration Membrane Fouling by ClO2 Pre-Oxidation: Fouling Mechanism and Interface Characteristics

Optimizing Synthesis of Anionic Surfactant‐Modified Carbon Black for Enhanced Ammonium Adsorption

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