Oxidation-enhanced ferric coagulation for alleviating ultrafiltration membrane fouling by algal organic matter: A comparison of moderate and strong oxidation

Yang, Zhimeng; Yu, Hui; Wei, Guangmei; Ye, Linxoing; Fan, Gongduan; Fang, Qian; Rong, Hongwei; Qu, Fangshu

doi:10.1016/j.algal.2022.102652

Cited by 17 publications

(9 citation statements)

References 51 publications

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“…[9] Fe(II)/permanganate Fe(II)/persulfate UF of algal EOM Fouling control: Fe(II)/persulfate > Fe(II)/permanganate Simultaneous oxidation and coagulation alleviated fouling. [8] OMCs/PDS UF of algal EOM Reversible resistance was reduced by 59.5-83.2%, and irreversible resistance declined by 71.7-73.0%. [7] UV/H 2 O 2 UV/chlorine UV/persulfate UF of algae-laden water Fouling control: UV/persulfate > UV/H 2 O 2 > UV/chlorine UV/chlorine aggravated the pore-blocking fouling.…”

Section: Aops Feed Water Results Referencementioning

confidence: 96%

“…[12] Sulfate-based (peroxodisulfate, persulfate, peroxymonosulfate, etc.) advanced AOPs are known to be green, efficient, and cost-effective [7,8,16]. Ultraviolet-activated sulfate system (UV/S) could generate sulfate radicals (SO 4…”

Section: Aops Feed Water Results Referencementioning

confidence: 99%

“…Membranes 2023, 13 Pretreatments such as coagulation [3], adsorption [7], oxidation [8], and the combined processes have proved effective in mitigating membrane fouling caused by algal cells and extracellular organic matter (EOM). Pre-oxidation could degrade macromolecules and decrease the hydrophobicity of the organic matter, and thus retard membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

“…It can be found that oxidation with strong radicals, like in UV/H 2 O 2 , UV/chlorine, ultrasonic/PAA, ozonation, and UV/S(IV), may induce algal cell lysis or degradation of high molecular weight (MW) EOM to low MW, which would aggravate membrane fouling [ 9 , 10 , 11 , 12 ]. Moderate oxidation with oxidants at relatively low dosages or with iron as an activator and a coagulant always resulted in better fouling alleviation [ 8 , 12 , 13 , 14 , 15 ]. Therefore, a synergy of moderate oxidation and coagulation may be optimal for controlling algae-associated fouling.…”

Section: Introductionmentioning

confidence: 99%

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UV/Fe(II)/S(IV) Pretreatment for Ultrafiltration of Microcystis aeruginosa-Laden Water: Fe(II)/Fe(III) Triggered Synergistic Oxidation and Coagulation

Yang

Wei

et al. 2023

Membranes

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Ultrafiltration (UF) has been proven effective in removing algae during seasonal algal blooms, but the algal cells and the metabolites can induce severe membrane fouling, which undermines the performance and stability of the UF. Ultraviolet-activated sulfite with iron (UV/Fe(II)/S(IV)) could enable an oxidation-reduction coupling circulation and exert synergistic effects of moderate oxidation and coagulation, which would be highly preferred in fouling control. For the first time, the UV/Fe(II)/S(IV) was systematically investigated as a pretreatment of UF for treating Microcystis aeruginosa–laden water. The results showed that the UV/Fe(II)/S(IV) pretreatment significantly improved the removal of organic matter and alleviated membrane fouling. Specifically, the organic matter removal increased by 32.1% and 66.6% with UV/Fe(II)/S(IV) pretreatment for UF of extracellular organic matter (EOM) solution and algae-laden water, respectively, while the final normalized flux increased by 12.0–29.0%, and reversible fouling was mitigated by 35.3–72.5%. The oxysulfur radicals generated in the UV/S(IV) degraded the organic matter and ruptured the algal cells, and the low-molecular-weight organic matter generated in the oxidation penetrated the UF and deteriorated the effluent. The over-oxidation did not happen in the UV/Fe(II)/S(IV) pretreatment, which may be attributed to the cyclic redox Fe(II)/Fe(III) coagulation triggered by the Fe(II). The UV-activated sulfate radicals in the UV/Fe(II)/S(IV) enabled satisfactory organic removal and fouling control without over-oxidation and effluent deterioration. The UV/Fe(II)/S(IV) promoted the aggregation of algal foulants and postponed the shift of the fouling mechanisms from standard pore blocking to cake filtration. The UV/Fe(II)/S(IV) pretreatment proved effective in enhancing the UF for algae-laden water treatment.

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Section: Aops Feed Water Results Referencementioning

confidence: 96%

Section: Aops Feed Water Results Referencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

UV/Fe(II)/S(IV) Pretreatment for Ultrafiltration of Microcystis aeruginosa-Laden Water: Fe(II)/Fe(III) Triggered Synergistic Oxidation and Coagulation

Yang

Wei

et al. 2023

Membranes

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“…Similarly, ultrafiltration was recorded to remove 47-54% of AOM. 49,82 Preoxidation can reduce ultrafiltration fouling caused by AOM. For instance, UV/permonosulfate retarded the fouling process by 86% at a permonosulfate dose of 0.5 mM, however, the permonosulfate oxidation of synthetic seawater led to the formation of reactive chlorine species (mainly Cl 2 − radical) and promoted the THM formation.…”

Section: Low Removal (X < 40%)mentioning

confidence: 99%

Algal organic matter as a disinfection by-product precursor during chlor(am)ination: a critical review

Leite,

Daniel,

Bond

2023

Environ. Sci.: Water Res. Technol.

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Landfill leachate treatment by direct contact membrane distillation: Impacts of landfill age on contaminant removal performance, membrane fouling and scaling

Yang,

Lin,

et al. 2024

Desalination

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Oxidation-enhanced ferric coagulation for alleviating ultrafiltration membrane fouling by algal organic matter: A comparison of moderate and strong oxidation

Cited by 17 publications

References 51 publications

UV/Fe(II)/S(IV) Pretreatment for Ultrafiltration of Microcystis aeruginosa-Laden Water: Fe(II)/Fe(III) Triggered Synergistic Oxidation and Coagulation

UV/Fe(II)/S(IV) Pretreatment for Ultrafiltration of Microcystis aeruginosa-Laden Water: Fe(II)/Fe(III) Triggered Synergistic Oxidation and Coagulation

Algal organic matter as a disinfection by-product precursor during chlor(am)ination: a critical review

Landfill leachate treatment by direct contact membrane distillation: Impacts of landfill age on contaminant removal performance, membrane fouling and scaling

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