Removal of Microcystis aeruginosa and control of algal organic matters by potassium ferrate(VI) pre-oxidation enhanced Fe(II) coagulation

Zhou, Jia; Zhao, Zhiwei; Liu, Jie; Peng, Wei; Peng, Xuebiao; Han, Yuting; Xiao, Ping

doi:10.1007/s11814-019-0358-z

Cited by 23 publications

(10 citation statements)

References 43 publications

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“…Algal cells are capable of excreting metabolites during both exponential and stationary phases of growth, leading to EOM accumulation that can drive carbonaceous or nitrogenous disinfection by-product formation during disinfection, and which is not readily removed via flocculation or pre-oxidation-enhanced flocculation [14]. Given the excellence of GO/diatomite flocculation of algal cells, we are therefore next assessed the ability of this solution to remove EOM from treated solutions.…”

Section: Go/diatomite Flocculation Mediated Eom Removalmentioning

confidence: 99%

“…Such blooms also negatively affect the efficiency of water treatment processes [10][11][12], with algal removal early during the treatment process being essential in order to minimize this impact. Potassium permanganate [13], potassium ferrate (VI) [14], chlorine [15], ozone [16] and advance oxidation process [17] have all been employed as pre-oxidants that can facilitate the enhanced removal of algae from drinking water, but these compounds can damage algal cell membranes and result in the release of algae-derived organic matter into the water supply [18]. As such, there is a clear value in developing an algae control strategy capable of removing algae from solution without damaging their cellular structure.…”

Section: Introductionmentioning

confidence: 99%

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Effective Removal of Algae from Water by Diatomite Enhanced Graphene Oxide Flocculation

Dong¹,

Huo²

2021

Pol. J. Environ. Stud.

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The ability of graphene oxide (GO) to function as a flocculant capable of mediating the removal of algae and associated extracellular organic matter (EOM) from water was assessed. GO was demonstrated to mediate the dose-dependent removal of algae via flocculation, with 40 mg/L GO being sufficient to remove 100% of chlorophyll-a (chl-a) and 99.1% of the UV 254 . Diatomite addition failed to enhance GO flocculation efficiency or to reduce the necessary GO dosage, although it did result in a significantly reduced settling time, with denser floc and a corresponding increase in supernatant ratio. GO-mediated algae flocculation was primarily achieved via netting and bridging mechanisms, with diatomite addition leading to the conversion of a subset of two-dimensional GO nets into threedimensional nets containing a diatomite core. Flocculation efficiency was comparable under acidic and neutral conditions but declined significantly with rising pH when pH≥7, with just 13.8% of chl-a being removed at pH of 10. At pH of 5, more than 60% of EOM and 57.6% to 90.1% of the disinfection byproduct formation potentials were reduced following the GO/diatomite flocculation process, and following flocculation the solution always had a final pH of 7.4±0.4 regardless of the starting pH.

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Section: Go/diatomite Flocculation Mediated Eom Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effective Removal of Algae from Water by Diatomite Enhanced Graphene Oxide Flocculation

Dong¹,

Huo²

2021

Pol. J. Environ. Stud.

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“…ment processes [12][13][14]. Based on the stated reasons and interests, many studies have in vestigated the synergistic processes of ferrate coupling with other techniques to improv its treatment efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the optimization of ferrate treatment with the assistance of other processing techniques is demanded. Moreover, ferrate involved technology can be an option for enhancing the performance of conventional water treatment processes [12][13][14]. Based on the stated reasons and interests, many studies have investigated the synergistic processes of ferrate coupling with other techniques to improve its treatment efficiency.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Ferrate with Various Water Processing Techniques—A Review

Zhang

Jiang

2022

Water

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The use of ferrate has been demonstrated as a highly efficient technique for the removal of pollutants in water and wastewater treatment. While most of the published work about ferrate investigated the treatment performance by ferrate alone, new applications of ferrate expand to the synergistic application of ferrate with other techniques such as membrane separation, sulphur-based chemical use, UV radiation, ozonation, acidification, and other chemical additives. This paper aims to review and explore the treatment performance and reaction mechanisms associated with synergistic applications of ferrate. The main objective of this study is to conduct case studies on the synergistic application of ferrate with other water processes. It was found that the efficiency of water treatment increased significantly by the synergistic application of ferrate, and this is attributed to the alleviation of membrane fouling, the activating the formation of more radical oxidative species, enhanced coagulation, and the potential improvement of micropollutants’ biodegradability. Therefore, the stated ferrate technology holds high potential for improving the efficiency of water treatment and other environmental remediation processes. Further studies are required to explore a more feasible combination of ferrate with other techniques and expand the understanding of the working mechanisms of the known synergistic applications of ferrate.

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“…5 But the coagulation process could be interfered with by algal organic matter. 6 In fact, it is still challenging to achieve high removal efficiency of cyanobacterial cells without signicant cell lysis, and the overdosed coagulant may cause secondary pollution for the subsequent mainstream processes. [7][8][9] Therefore, developing novel technologies to reduce cyanobacterial cells' threat to drinking water quality is important and necessary.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted coagulation for Microcystis aeruginosa removal using Fe₃O₄-loaded carbon nanotubes

Wang

2020

RSC Adv.

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Removal of Microcystis aeruginosa and control of algal organic matters by potassium ferrate(VI) pre-oxidation enhanced Fe(II) coagulation

Cited by 23 publications

References 43 publications

Effective Removal of Algae from Water by Diatomite Enhanced Graphene Oxide Flocculation

Effective Removal of Algae from Water by Diatomite Enhanced Graphene Oxide Flocculation

Synergistic Effect of Ferrate with Various Water Processing Techniques—A Review

Ultrasound-assisted coagulation for Microcystis aeruginosa removal using Fe₃O₄-loaded carbon nanotubes

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Removal of Microcystis aeruginosa and control of algal organic matters by potassium ferrate(VI) pre-oxidation enhanced Fe(II) coagulation

Cited by 23 publications

References 43 publications

Effective Removal of Algae from Water by Diatomite Enhanced Graphene Oxide Flocculation

Effective Removal of Algae from Water by Diatomite Enhanced Graphene Oxide Flocculation

Synergistic Effect of Ferrate with Various Water Processing Techniques—A Review

Ultrasound-assisted coagulation for Microcystis aeruginosa removal using Fe3O4-loaded carbon nanotubes

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Ultrasound-assisted coagulation for Microcystis aeruginosa removal using Fe₃O₄-loaded carbon nanotubes