Reusable Fe3O4/SBA15 Nanocomposite as an Efficient Photo-Fenton Catalyst for the Removal of Sulfamethoxazole and Orange II

Today, the presence of recalcitrant pollutants in wastewater, such as pharmaceuticals or other organic compounds, is one of the main obstacles to the widespread implementation of water reuse. In this context, the development of innovative processes for their removal becomes necessary to guarantee effluent quality. This work presents the potentiality of magnetic nanoparticles immobilized on SBA-15 mesoporous silica as Fenton and photo-Fenton catalysts under visible light irradiation. The influence of the characteristics of the compounds and nanoparticles on the removal yield was investigated. Once the key aspects of the reaction mechanism were analyzed, to evaluate the feasibility of this process, an azo dye (Orange II) and an antibiotic (sulfamethoxazole) were selected as main target compounds. The concentration of Orange II decreased below the detection limit after two hours of reaction, with mineralization values of 60%. In addition, repeated sequential experiments revealed the recoverability and stability of the nanoparticles in a small-scale reactor. The benchmarking of the obtained results showed a significant improvement of the process using visible light in terms of kinetic performance, comparing the results to the Fenton process conducted at dark. Reusability, yield and easy separation of the catalyst are its main advantages for the industrial application of this process.

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Performance Analysis of the Rotating Biological Contactor Process Based on Particle Fraction and Improvement of Final Effluent Quality

Water Science & Technology ◽

10.2166/wst.1991.0598 ◽

1991 ◽

Vol 23 (7-9) ◽

pp. 1457-1466 ◽

Cited By ~ 3

Author(s):

Kazuhiro Tanaka ◽

Minoru Tada ◽

Mitsuo Ito ◽

Noritugu Shimizu

Keyword(s):

Suspended Solids ◽

Fine Particles ◽

Wastewater Treatment Plants ◽

Small Scale ◽

Particle Fraction ◽

Effluent Quality ◽

Rotating Biological Contactors ◽

Activated Sludge Processes ◽

Fraction Method ◽

Final Effluent

Biofilm processes are, in general, suitable for small-scale wastewater treatment plants. However, final effluent qualities of biofilm processes are not as good as those of activated sludge processes due to fine particles remaining in the effluents. To improve the effluent qualities of the Rotating Biological Contactors (RBC) process, the behavior of fine particles through the process and the removal of fine particles with solids-liquid separation methods, rapid filtration and coagulation-filtration, were investigated using the particle fraction method. The results are as follows:–An increase of the hydraulic retention time (HRT) in the RBC reactor reduced the amount of fine particles and increased the amount of coarse suspended solids of 44 µm or more in diameter, which are easily removed by clarification. Thus, the final effluent qualities were improved by the increase of HRT.–Suspended solids in effluent from the RBC process at the standard loading are so fine that improvement of the quality is not expected by only lowering the overflow rate of a final clarifier. In contrast, rapid filtration or a coagulation-filtration process is effective. The supended solid concentration and transparency of the effluent from the final clarifier was improved by a factor of two to four, and then BOD of the final effluent was removed by 40-85%.

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Effect of initial solution pH on the degradation of Orange II using clay-based Fe nanocomposites as heterogeneous photo-Fenton catalyst

Water Research ◽

10.1016/j.watres.2005.12.021 ◽

2006 ◽

Vol 40 (4) ◽

pp. 641-646 ◽

Cited By ~ 148

Author(s):

Jiyun Feng ◽

Xijun Hu ◽

Po Lock Yue

Keyword(s):

Initial Solution ◽

Orange Ii ◽

Solution Ph ◽

Fenton Catalyst

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Making Waves: Why water reuse frameworks need to co-evolve with emerging small-scale technologies

Water Research X ◽

10.1016/j.wroa.2021.100094 ◽

2021 ◽

Vol 11 ◽

pp. 100094

Author(s):

Eva Reynaert ◽

Angelika Hess ◽

Eberhard Morgenroth

Keyword(s):

Water Reuse ◽

Small Scale

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Development of a small-scale reactor for upgraded biofuel pellets

Renewable Energy ◽

10.1016/j.renene.2021.02.057 ◽

2021 ◽

Vol 170 ◽

pp. 1197-1214

Author(s):

Alok Dhaundiyal ◽

Gabor Bercesi ◽

Divine Atsu ◽

Laszlo Toth

Keyword(s):

Small Scale ◽

Scale Reactor

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Heterogeneous activation of persulfate by Bi2MoO6–CuS composite for efficient degradation of orange II under visible light

Chemosphere ◽

10.1016/j.chemosphere.2022.133558 ◽

2022 ◽

pp. 133558

Author(s):

Fang Zhu ◽

Huiqi Wu ◽

He Zhang ◽

Sridhar Komarneni ◽

Jianfeng Ma

Keyword(s):

Visible Light ◽

Orange Ii

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p-Cu2O/n-ZnO heterojunction applied to visible light Orange II degradation

Solar Energy ◽

10.1016/j.solener.2010.03.024 ◽

2010 ◽

Vol 84 (7) ◽

pp. 1187-1192 ◽

Cited By ~ 59

Author(s):

N. Helaïli ◽

Y. Bessekhouad ◽

A. Bouguelia ◽

M. Trari

Keyword(s):

Visible Light ◽

Orange Ii ◽

Light Orange

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Insights from a Global Engineering Outreach Course

International Journal for Service Learning in Engineering Humanitarian Engineering and Social Entrepreneurship ◽

10.24908/ijsle.v0i0.5552 ◽

2014 ◽

pp. 256-268 ◽

Cited By ~ 2

Author(s):

Randy S Lewis

Keyword(s):

Learning Outcomes ◽

Small Scale ◽

Community Members ◽

Social Scientists ◽

Technology Students ◽

Global Engineering ◽

Engineering And Technology ◽

Developing Communities ◽

Engineering Outreach ◽

Key Aspects

A two-semester multi-disciplinary Global Engineering Outreach (GEO) course was initiated in 2007 to provide an opportunity for junior and senior-level engineering and technology students to design and implement humanitarian-based engineering projects in developing communities. Recently, the course was integrated with a sociology course to enhance the educational opportunities between social scientists and engineers. During the GEO course, students work on small-scale projects that are selected in conjunction with members of the developing communities. Students regularly interact with community members during project development. Following the GEO course, students participate in a two-week implementation trip. Learning outcomes associated with the course are described and assessment results show that many aspects of the learning outcomes are being met but there is room for improvement. In addition, following years of experience, several insights have been identified to help improve the course, community engagement, and implementation trip. Finally, several key aspects that are noteworthy for involving students in designing and implementing projects in developing communities are described.

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Annealing Temperature-Dependent Effects of Fe-Loading on the Visible Light-Driven Photocatalytic Activity of Rutile TiO2 Nanoparticles and Their Applicability for Air Purification

Catalysts ◽

10.3390/catal10070739 ◽

2020 ◽

Vol 10 (7) ◽

pp. 739

Author(s):

Soong Yeon Kim ◽

Shahid Saqlain ◽

Byeong Jun Cha ◽

Shufang Zhao ◽

Hyun Ook Seo ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Photoelectron Spectroscopy ◽

Annealing Temperature ◽

Separation Efficiency ◽

Small Scale ◽

Production Scale ◽

Rutile Tio2 ◽

Fe Oxide ◽

Metal Support Interaction

Commercial rutile TiO2 particles (200–300 nm) were modified by the temperature-regulated chemical vapor deposition (tr-CVD) of Fe-oxide and subsequent annealing at various temperatures (300~750 °C). As a result of the modification, the photocatalytic activity of the TiO2 regarding acetaldehyde removal under visible light was enhanced, and the enhancement effects were dependent on the annealing temperature. Specifically, the enhancement effects of the modification were most pronounced when Fe-TiO2 was annealed at 375 °C, whereas the effects were significantly reduced by annealing at higher temperatures (525 and 750 °C). The analytical results with various techniques, including two surface-sensitive methods (XPS (X-ray photoelectron spectroscopy) and TOF-SIMS (time of fight-secondary ion mass spectrometry)), revealed that the stronger metal support interaction between TiO2 and the loaded Fe-oxide at high temperature (>375 °C) resulted in the decreased charge separation efficiency and photocatalytic activity of the Fe-TiO2 under light irradiation. The production scale for the Fe-TiO2 photocatalysts can be easily increased (from 200 g to 8 kg per the unit process) by upsizing the reactor volume. The mass-produced samples exhibited similar activity to the samples produced at small scale, and they were photocatalytically active after being spread on a cement block (stainless steel plate) using a surface hardening agent (paint), showing the high applicability in real applications.

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