Photo-Fenton abatement of aqueous organics using metal-organic frameworks: An advancement from benchmark zeolite

MacDonald, Matt J.; Cho, Dong-Wan; Yu, Iris K.M.; Tsang, Daniel C.W.; Yip, Alex C.K.

doi:10.1016/j.scitotenv.2018.06.357

Cited by 20 publications

(3 citation statements)

References 58 publications

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“…By preparing Ag 2 CO 3 and UIO-66 into composite materials, their degradation rate of Rhodamine B was greatly improved. Matthew J. MacDonald et al [14] prepared Fe/MIL-47MOF materials and added H 2 O 2 as a co oxidant, achieving efficient photocatalytic degradation of methylene blue (MB) with a degradation rate of 98.2%; Chi et al [15] prepared iron based MOF material MIL-101 (Fe) and its amino functionalized derivatives, and used them as water oxidation catalysts (WOCs) for oxygen evolution under visible light irradiation. The results showed that MIL-101 (Fe) had excellent visible light driven oxygen evolution activity.…”

Section: Current Research Status Of Mof Photocatalytic Materials Appl...mentioning

confidence: 99%

Research Progress in the Development and Application of Photocatalysis Technology and Materials

Dong,

Lu,

Yin

et al. 2023

IJE

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In recent years, photocatalytic technology has become a research hotspot for the treatment of organic wastewater, uranium containing wastewater, and Cr (VI) containing wastewater due to its advantages of environmental friendliness, simple reaction process, and high degradation efficiency. Uranium, as the main component of nuclear fuel, is an important strategic resource. The separation and enrichment technology of uranium is of great significance for the sustainable development of nuclear energy. Previously, a series of solid adsorption materials for uranium extraction have been developed, such as inorganic minerals, mesoporous silica, magnetic nanomaterials, carbon based materials, and advanced porous materials. However, due to the comprehensive performance of stability, removal kinetics, adsorption capacity, selectivity, and reusability, the practical application of these materials is still inevitably limited. And photocatalytic technology can reduce easily soluble and easily flowing U (VI) to more difficult to dissolve and relatively non flowing U (IV), thus overcoming the above problems and achieving the reduction and fixation of uranium. Moreover, this technology only relies on inexhaustible solar energy as energy source, and has the advantage of green and clean. Therefore, the use of photocatalytic technology to separate and enrich uranium is of great significance for the sustainable development of nuclear energy. However, most semiconductor photocatalysts have shortcomings in terms of light absorption capacity and charge separation ability, which limits their practical application in wastewater treatment. In addition, there are many difficulties in photocatalytic treatment of wastewater, such as the fast recombination speed of photo generated electron hole pairs generated by the catalyst, the weak visible light response of most single semiconductor materials, the need to introduce additional sacrificial agents to capture holes in the reaction, and the introduction of inert gases to eliminate the interference of oxygen. This article provides a certain scientific basis for expanding the application of various photocatalytic technologies in wastewater treatment.

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Section: Current Research Status Of Mof Photocatalytic Materials Appl...mentioning

confidence: 99%

Research Progress in the Development and Application of Photocatalysis Technology and Materials

Dong,

Lu,

Yin

et al. 2023

IJE

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“…Advanced oxidation processes (AOPs) can degrade a variety of organic contaminants into less complex byproducts and finally mineralize them into carbon dioxide and water in both surface water and wastewater (Dhaka et al, 2018). Various UV-based processes can be significantly enhanced by the combination of technologies (MacDonald et al, 2018). UV process can overcome several problems in the other processes, such as long reaction time in biological processes, sludge production in coagulation process, regeneration of adsorbent in adsorption process, and acidic condition in Fenton oxidation (Rodríguez-Chueca et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Degradation of antibiotics by modified vacuum-UV based processes: Mechanistic consequences of H2O2 and K2S2O8 in the presence of halide ions

Sun

Cho

Graham

et al. 2019

Science of The Total Environment

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107

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In this work, the degradation of cefalexin, norfloxacin, and ofloxacin was examined via various advanced oxidation processes (AOPs). Direct photolysis by ultraviolet (UV) and vacuum ultra violet (VUV) was less effective for the degradation of fluoroquinolone antibiotics such as norfloxacin and ofloxacin than that of cefalexin. Both hydrogen peroxide (H 2 O 2) and potassium persulfate (K 2 S 2 O 8) assisted UV/VUV process remarkably enhanced fluoroquinolone degradation. The addition of K 2 S 2 O 8 was superior to H 2 O 2 under VUV irradiation, with the best removal efficiency of norfloxacin and ofloxacin being almost 100% within 3 min in the presence of VUV/K 2 S 2 O 8. The ofloxacin degradation rate was accelerated as concentrations of H 2 O 2 and K 2 S 2 O 8 was increased to 3 mM, but the degradation rate was slightly decreased with excess H 2 O 2 (> 3 mM). The performance of modified VUV processes (i.e., VUV/H 2 O 2 and VUV/K 2 S 2 O 8) was inhibited at highly alkaline condition (pH 11). The coexistence of halides (Cl − and Br −) enhanced antibiotics degradation via the modified VUV processes, but the reaction was almost unaffected in the presence of single halides. This study demonstrated that modified VUV processes (especially VUV/K 2 S 2 O 8) are efficient for eliminating fluoroquinolone antibiotics from water, which can be considered as a clean and green method for the treatment of antibiotics-containing industrial wastewater.

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“…3–5) EF cycles and offer minimal leaching of iron into solutions. In most cases, the experiments are performed at pH 3–5, with only few studies exploring the pH values expected to be encountered during realistic operation with natural water (6.5–7.5) [20,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Fe-Nanoporous Carbon Derived from MIL-53(Fe): A Heterogeneous Catalyst for Mineralization of Organic Pollutants

Cowan

Drobek

et al. 2019

Nanomaterials

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Catalytic electrodes were prepared via carbonization of MIL-53(Fe) on the surface of porous carbon felt electrodes (CF) for use in wastewater treatment by the heterogeneous electro-Fenton (EF) process. The best results were obtained when the carbon felt was pretreated with nitric acid, enhancing the affinity of the MIL-53(Fe) for the surface. Following a series of optimization experiments, carbonization conditions of 800 °C for 5 h were used to form Fe-nanoporous carbon (MOFs@CF). The as-prepared electrodes were used as both cathode and heterogeneous catalyst in the EF process for the mineralization of exemplar dye Acid Orange 7 (AO7). Total organic carbon (TOC) removal of 46.1% was obtained within 8 h of electrolysis at around neutral pH (6.5) and the electrode retained over 80% of its original efficiency over five treatment cycles.

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Photo-Fenton abatement of aqueous organics using metal-organic frameworks: An advancement from benchmark zeolite

Cited by 20 publications

References 58 publications

Research Progress in the Development and Application of Photocatalysis Technology and Materials

Research Progress in the Development and Application of Photocatalysis Technology and Materials

Degradation of antibiotics by modified vacuum-UV based processes: Mechanistic consequences of H2O2 and K2S2O8 in the presence of halide ions

Fe-Nanoporous Carbon Derived from MIL-53(Fe): A Heterogeneous Catalyst for Mineralization of Organic Pollutants

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