Oxidation of bisphenol A by persulfate via Fe3O4-α-MnO2 nanoflower-like catalyst: Mechanism and efficiency

Dong, Zheng-Yu; Zhang, Qian; Chen, Bor-Yann; Hong, Ji-Hyung

doi:10.1016/j.cej.2018.09.179

Cited by 173 publications

(35 citation statements)

References 49 publications

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“…Therefore, the leaching of total iron in the Fe 3 O 4 @GO + K 2 S 2 O 8 system over six successive cycle experiments was monitored, as shown in Figure 4b. Herein, the leaching amount of total iron was below 0.05 mg/L over the six cycles, which would be very suitable for the environment due to the lack of generation of any secondary pollution, following the European Union's (EU's) discharge guidelines for iron leaching values, which allows for up to 2 mg/L [38]. This outcome indicates that the PS activation system played a significant role in iron leaching recycling tests without the addition of any iron in the solution.…”

Section: Durability Of Fe 3 O 4 @Gomentioning

confidence: 99%

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Pervez

Zarra

et al. 2020

Water

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Persulfate (PS)-activated, iron-based heterogeneous catalysts have attracted significant attention as a potential advanced and sustainable water purification system. Herein, a novel Fe 3 O 4 impregnated graphene oxide (Fe 3 O 4 @GO)-activated persulfate system (Fe 3 O 4 @GO+K 2 S 2 O 8 ) was synthesized by following a sustainable protocol and was tested on real wastewater containing dye pollutants. In the presence of the PS-activated system, the degradation efficiency of Rhodamine B (RhB) was significantly increased to a level of ≈95% compared with that of Fe 3 O 4 (≈25%). The influences of different operational parameters, including solution pH, persulfate dosage, and RhB concentration, were systemically evaluated. This system maintained its catalytic activity and durability with a negligible amount of iron leached during successive recirculation experiments. The degradation intermediates were further identified through reactive oxygen species (ROS) studies, where surface-bound SO 4 − was found to be dominant radical for RhB degradation. Moreover, the degradation mechanism of RhB in the Fe 3 O 4 @GO+K 2 S 2 O 8 system was discussed. Finally, the results indicate that the persulfate-activated Fe 3 O 4 @GO catalyst provided an effective pathway for the degradation of dye pollutants in real wastewater treatment.Water 2020, 12, 733 2 of 17 many advantages, such as a higher redox potential, wide pH range (2-11), longer life span, and more efficiency over •OH that enables excellent electron transfer of the oxidant toward higher contaminant degradation [6,7]. In general, the production of sulfate radicals can be obtained through PS activation by using several strategies, such as heat, ultraviolet, ultrasound, transition metal ions, carbonaceous-based materials, base, phenol, glucose, and ascorbic acid [8]. Consequently, transition-metal-based catalysts have been widely utilized as a PS activator due to their excellent catalytic efficiency [9]. However, the drawbacks of transition-metal-based catalysts for inhomogeneous systems include poor removal efficiency, precipitation of iron (III) as sludge, and less reusability, which has hindered their widespread use [10]. Hence, transition-metal-based heterogeneous catalyst systems have received tremendous attention for PS activation because of their environmentally friendly nature, high performance, simple operation stability, and high availability [11]. Iron (Fe)-based heterogeneous catalyst materials (e.g., Fe 3 O 4 ) have received much attention regarding frequently activating PS because of their high natural abundance, low price, and they could easily prevent secondary pollution through their recovery performance [12]. However, Fe 3 O 4 nanoparticles usually tend to aggregate in the solution, which can decrease their surface area and cause lower stability and catalytic efficiency [13]. Taking this into consideration, it is necessary to use a proper support that can enhance their overall performance. Graphene has been widely reported to be an emerging supporting material f...

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Section: Durability Of Fe 3 O 4 @Gomentioning

confidence: 99%

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Pervez

Zarra

et al. 2020

Water

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“…With different valences, manganese oxides and its composites can be effective catalysts that can be applied in environmental remediation activation of PS. It has been reported that bimetallic catalysts could efficaciously boost the performance of catalysts from various perspectives [12]. In municipal sludge and SDBC, iron occupies a large proportion of the total metals, while the amount of manganese is relatively rare [13].…”

Section: Introductionmentioning

confidence: 99%

Activation of persulfate by manganese oxide-modified sludge-derived biochar to degrade Orange G in aqueous solution

Fan

Zhang

et al. 2019

Environmental Pollutants and Bioavailability

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Manganese oxide-loaded sludge-derived biochar (Mn-SDBC) was synthesized and used to activate persulfate (PS) for Orange G (OG) degradation. X-ray fluorescence and Fourier transform infrared spectroscopy analysis indicated that the manganese oxides were successfully loaded on the SDBC. The result of batch experiments suggests that OG can be efficiently degraded by PS activated by Mn-SDBC. Metal loading rate, biochar dosage and PS concentration play a crucial role in experiments, whereas pH has a minor effect on OG removal. The free radical quenching experiment was investigated to determine the predominant radical species, and the activation mechanism was also illustrated. The as-synthesized Mn-SDBC can efficiently activate PS and removal OG under a continuous flow condition in a fixed-bed column. Our study suggests that Mn-SDBC would be a promising catalyst for the remediation of dye-contaminated wastewater.

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“…Furthermore, the bactericidal activity of Fe3O4@SnO2 was reported for E.coli inactivation, and the bactericidal activity of hydrothermally prepared photocatalyst was higher than the sonochemically prepared one [177]. to the synergetic effect of manganese, iron, and hydroxyl groups on Fe3O4@α-MnO2 surface, Fe3O4@α-MnO2 photocatalyst showed high TOC removal and degradation rates [178]. Fig.…”

Section: Iron Oxide Modified Binary Metal Oxide Photocatalystsmentioning

confidence: 90%

“…shows the magnetic hysteresis loop of photocatalyst indicating a remarkable super-paramagnetism and saturation magnetization value of 39.9 emu g -1 . Due to its excellent stability and reusability characteristics, Fe3O4 @α-MnO2@PS system maintained a catalytic efficiency of 80% after five successively catalytic cycles [178].…”

Section: Iron Oxide Modified Binary Metal Oxide Photocatalystsmentioning

confidence: 99%

Systematic review on applicability of magnetic iron oxides–integrated photocatalysts for degradation of organic pollutants in water

Singh

Sharma

Hasija

et al. 2019

Materials Today Chemistry

117

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Oxidation of bisphenol A by persulfate via Fe3O4-α-MnO2 nanoflower-like catalyst: Mechanism and efficiency

Cited by 173 publications

References 49 publications

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Activation of persulfate by manganese oxide-modified sludge-derived biochar to degrade Orange G in aqueous solution

Systematic review on applicability of magnetic iron oxides–integrated photocatalysts for degradation of organic pollutants in water

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