Visible light activated magnetic photocatalysts for water treatment

Almeida, Fernanda Pailo de; Grzebielucka, Edson Cezar; Antunes, Sandra Regina Masetto; Borges, Christiane Philippini Ferreira; Andrade, André Vitor Chaves de; Souza, Éder Carlos Ferreira de

doi:10.1016/j.jenvman.2020.111143

Cited by 17 publications

(6 citation statements)

References 38 publications

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“…The actual wastewater system is very complex. In addition to insoluble oil, it may also contain a large number of organic pollutants such as dyes. − At present, the dyes used in industry are usually synthetic and toxic organic pollutants. Most dyes have carcinogenicity and mutagenicity .…”

Section: Resultsmentioning

confidence: 99%

Blow-Spun Nanofibrous Membrane for Simultaneous Treatment of Emulsified Oil/Water Mixtures, Dyes, and Bacteria

et al. 2022

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Membrane separation is of great significance due to its unique performance in treating wastewater. However, the simultaneous treatment of oily emulsions and other complex pollutants in water remains challenging. Herein, we have proposed a simple strategy to prepare a multifunctional titanium dioxide/silver nanoparticles/polyacrylonitrile (TiO 2 /AgNPs/PAN) nanofibrous membrane. The experimental results showed that the combination of the hierarchical structure composed of PAN nanofibers and Ag/TiO 2 nanoprotrusions contributed to the superhydrophilicity and superoleophobicity (UOCA = 153.3 ± 2.0°). Further, the nanofibrous membrane exhibited a rapid gravity-driven permeate flux (>1829.37 ± 83.51 L m −2 h −1 ) and an ultrahigh separation efficiency (>99.9%) for the surfactant-stabilized oil/water emulsions. Moreover, due to the synergistic effect between the PAN fibers and TiO 2 /Ag heterojunction, Rhodamine B dye in water can be removed quickly and efficiently (up to 97.67% in 90 min). More importantly, the obtained nanofibrous membrane exhibited ultrahigh stability in different harsh environments. The design of superoleophobic nanofiber membrane with a high separation efficiency and high photocatalytic activity has great potential for practical applications in the purification of oily wastewater.

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Section: Resultsmentioning

confidence: 99%

Blow-Spun Nanofibrous Membrane for Simultaneous Treatment of Emulsified Oil/Water Mixtures, Dyes, and Bacteria

et al. 2022

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“…However, separation of these particles after the process is complicated since in most of the cases the best photocatalytic activity is achieved for nanoparticles that do not sediment easily by gravity and whose presence in the treated water is unwanted. One elegant solution to this dilemma, higher activity for nanoparticles and difficult recovery and separation after the process, could be the use of magnetically responsive photocatalysts. However, for continuous flow it is always more convenient to deposit a thin film of the photocatalyst in the illuminated region of the photoreactor. Photocatalyst immobilization raises, however, the issue of how to design the reactor to ensure sufficient contact between the irradiated photocatalyst and the pollutants in water.…”

Section: Innovative Combined Solar Driven Technologies: Advantages An...mentioning

confidence: 99%

Recent Progress and Prospects in Catalytic Water Treatment

et al. 2021

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…The range of Hydrogen-ion concentration for secondary treatment of wastewater is 6 to 9 and for discharge of the treated wastewater into the environment is 6.8 to 8.5 (17).…”

Section: Effect Of Concentrations Of Fecl 3 With and Without Smfs On ...mentioning

confidence: 99%

“…One of the methods that has been considered by many researchers is the application of static magnetic fields (SMFs) for water and wastewater treatment process. SMFs are magnetic fields that do not vary in intensity over time and have a frequency of 0 Hz (17,18). The application of SMFs for treatment of wastewater could increase the physical properties of wastewater components and, improve the separation of solids from liquid phase.…”

Section: Introductionmentioning

confidence: 99%

Bulking Control in Complete-Mixed Activated Sludge Process Using Combination of Metallic Coagulants and Static Magnetic Fields

Asgari

Seid‐Mohammadi

Khoshniyat

et al. 2022

Avicenna J Environ Health Eng

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Metallic coagulants have been used for more coagulation and flocculation of flocs in many wastewater treatment plants (WWTPs) in all parts of the world. The integration of different methods to improve the wastewater treatment process has been considered in recent years. In this case-control study, the effects of four main coagulants (ferric chloride, ferric sulfide, alum, and poly-aluminum chloride) on sludge volume index (SVI) with and without exposure of static magnetic fields (SMFs) have been investigated. Both methods significantly reduced SVI (mL/g), but the combination of SMFs and coagulants was more effective. Ferric chloride could control bulking or reduce SVI to less than 150 mL/g at concentrations of 0.0625 to 2 g/L when the SMFs intensity of 15 mT was used. The control of bulking in other coagulants happened when SMFs were added to coagulants at 0.0625-0.125 g/L concentration of coagulants (P<0.05). With the application of SMFs, the highest reduction of SVI belonged to ferric sulfide (43.60%), followed by ferric chloride (18.40%), poly-aluminum chloride (PACl) (20.19%), and alum (19.80%). Without the application of SMFs, the highest reduction of SVI belonged to ferric chloride (38.36%), followed by alum (34.94%), PACl (25.43%), and ferric sulfide (6.69%).

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Visible light activated magnetic photocatalysts for water treatment

Cited by 17 publications

References 38 publications

Blow-Spun Nanofibrous Membrane for Simultaneous Treatment of Emulsified Oil/Water Mixtures, Dyes, and Bacteria

Blow-Spun Nanofibrous Membrane for Simultaneous Treatment of Emulsified Oil/Water Mixtures, Dyes, and Bacteria

Recent Progress and Prospects in Catalytic Water Treatment

Bulking Control in Complete-Mixed Activated Sludge Process Using Combination of Metallic Coagulants and Static Magnetic Fields

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