Performance and reaction mechanism of MgO/ZnO/Graphene ternary nanocomposite in coupling with LED and ultrasound waves for the degradation of sulfamethoxazole and pharmaceutical wastewater

Moradi, Shapour; Sobhgol, Seyed Ali; Hayati, Farzan; Isari, Ali Akbar; Kakavandi, Babak; Bashardoust, Parnia; Anvaripour, Bagher

doi:10.1016/j.seppur.2020.117373

Cited by 91 publications

(23 citation statements)

References 53 publications

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“…, which is higher than that of some organic compounds with •OH, thus inhibiting the degradation reaction of chemical pharmaceutical wastewater [34]. On the other hand, there is an addition reaction.…”

Section: Effect Of Uv Light Distancementioning

confidence: 93%

“…The most likely reason is that nano polymetallic oxides are fixed and supported on the high surface area, which can not only prevent the accumulation of polymetallic oxides, but also prevent their loss to the water sample and improve their catalytic activity. So far, various materials have been applied to the carrier in the research process, such as graphene, activated carbon and bentonite [34,35]. Although they have a high external surface area and can help to remove COD through adsorption, their removal efficiency is still limited by the quality of wastewater and coulomb repulsive-force.…”

Section: Effects Of Different Treatment Systemsmentioning

confidence: 99%

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Heterogeneous Photo-Fenton Catalytic Degradation of Practical Pharmaceutical Wastewater by Modified Attapulgite Supported Multi-Metal Oxides

Wang

et al. 2021

Water

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Chemical synthetic pharmaceutical wastewater has characteristics of high concentration, high toxicity and poor biodegradability, so it is difficult to directly biodegrade. We used acid modified attapulgite (ATP) supported Fe-Mn-Cu polymetallic oxide as catalyst for multi-phase Fenton-like ultraviolet photocatalytic oxidation (photo-Fenton) treatment with actual chemical synthetic pharmaceutical wastewater as the treatment object. The results showed that at the initial pH of 2.0, light distance of 20 cm, and catalyst dosage and hydrogen peroxide concentration of 10.0 g/L and 0.5 mol/L respectively, the COD removal rate of wastewater reached 65% and BOD5/COD increased to 0.387 when the reaction lasted for 180 min. The results of gas chromatography-mass spectrometry (GC-MS) indicated that Fenton-like reaction with Fe-Mn-Cu@ATP had good catalytic potential and significant synergistic effect, and could remove almost all heterocycle compounds well. 3D-EEM (3D electron microscope) fluorescence spectra showed that the fluorescence intensity decreased significantly during catalytic degradation, and the UV humus-like and fulvic acid were effectively removed. The degradation efficiency of the nanocomposite only decreased by 5.8% after repeated use for 6 cycles. It seems appropriate to use this process as a pre-treatment for actual pharmaceutical wastewater to facilitate further biological treatment.

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Section: Effect Of Uv Light Distancementioning

confidence: 93%

Section: Effects Of Different Treatment Systemsmentioning

confidence: 99%

Heterogeneous Photo-Fenton Catalytic Degradation of Practical Pharmaceutical Wastewater by Modified Attapulgite Supported Multi-Metal Oxides

Wang

et al. 2021

Water

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“…Under optimized conditions, the removal efficiencies of 100%, 93% and 89% were obtained for sulfamethoxazole, the (COD), and (TOC), respectively. Moradi et al [ 75 ] used the MgO/ZnO/Graphene (MZG) ternary nanocomposite to study the refractory sulfamethoxazole antibiotics in simulated wastewater compared to binary and single processes. After 120 min of sonophotocatalytic treatment, complete degradation of sulfamethoxazole antibiotic (55 mg/L) can be attained at MZG: 0.8 g/L, pH: 9.0, LED power: 90 W and US power: 250 W. The degradation efficiency of the nanocomposite decreased by up to 9.8% after six consecutive cycles of reuse.…”

Section: Removal Of Pharmaceuticalmentioning

confidence: 99%

Recent Advances of Photocatalytic Application in Water Treatment: A Review

et al. 2021

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Photocatalysis holds great promise as an efficient and sustainable oxidation technology for application in wastewater treatment. Rapid progress developing novel materials has propelled photocatalysis to the forefront of sustainable wastewater treatments. This review presents the latest progress on applications of photocatalytic wastewater treatment. Our focus is on strategies for improving performance. Challenges and outlooks in this promising field are also discussed. We hope this review will help researchers design low-cost and high-efficiency photocatalysts for water treatment.

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“…Moradi, et al [199] reported the sonophotocatalytic degradation of sulfamethoxazole using MgO/ZnO/Graphene nanocomposite. Incorporation of graphene and ZnO with MgO enhanced its catalytic activity under both UV and visible light radiation.…”

Section: Sonocatalytic/sono-photocatalytic Processmentioning

confidence: 99%

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Olatunde

Onwudiwe

2021

IJERPH

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The incessant release of pharmaceuticals into the aquatic environment continues to be a subject of increasing concern. This is because of the growing demand for potable water sources and the potential health hazards which these pollutants pose to aquatic animals and humans. The inability of conventional water treatment systems to remove these compounds creates the need for new treatment systems in order to deal with these class of compounds. This review focuses on advanced oxidation processes that employ graphene-based composites as catalysts for the degradation of pharmaceuticals. These composites have been identified to possess enhanced catalytic activity due to increased surface area and reduced charge carrier recombination. The techniques employed in synthesizing these composites have been explored and five different advanced oxidation processes—direct degradation process, chemical oxidation process, photocatalysis, electrocatalyis processes and sonocatalytic/sono-photocatalytic processes—have been studied in terms of their enhanced catalytic activity. Finally, a comparative analysis of the processes that employ graphene-based composites was done in terms of process efficiency, reaction rate, mineralization efficiency and time required to achieve 90% degradation.

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Performance and reaction mechanism of MgO/ZnO/Graphene ternary nanocomposite in coupling with LED and ultrasound waves for the degradation of sulfamethoxazole and pharmaceutical wastewater

Cited by 91 publications

References 53 publications

Heterogeneous Photo-Fenton Catalytic Degradation of Practical Pharmaceutical Wastewater by Modified Attapulgite Supported Multi-Metal Oxides

Heterogeneous Photo-Fenton Catalytic Degradation of Practical Pharmaceutical Wastewater by Modified Attapulgite Supported Multi-Metal Oxides

Recent Advances of Photocatalytic Application in Water Treatment: A Review

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

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