A novel strategy for enhancing heterogeneous Fenton degradation of dye wastewater using natural pyrite: Kinetics and mechanism

Wang, Chongqing; Sun, Ruirui; Huang, Rong; Cao, Yingnan

doi:10.1016/j.chemosphere.2021.129883

Cited by 83 publications

(16 citation statements)

References 50 publications

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“…This situation may be associated with the high oxidation potential of hydroxyl radicals at low pH values and decreasing potential of hydroxyl radicals at high pH values. Since the dissolution of FeS2 and the formation of Fe2+ increased in acidic environments [16] the highest yield was observed at pH 2 in this study. Fe3+ is formed as a result of the FeS2 and H2O2 reactions, and besides this, SO42− and H+ are formed (Eq.…”

Section: Effect Of Wastewater Ph and Timementioning

confidence: 54%

“…Also, they stated that pyrite releases iron into the environment more slowly than ZVI, and it has a regulatory effect on the iron cycle. Although the efficiency of pyrite as a catalyst in Fenton processes for dye-containing wastewaters has been investigated [16], [17], as far as the author is aware, the effectiveness of Peru origin pyrite ore on COD removal for the dye mixture wastewaters (Rhodamine 6G, methyl orange, and crystal violet dyes) has not been previously investigated with heterogeneous fenton processes.…”

Section: Introductionmentioning

confidence: 99%

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COD Removal from Mixed Dye Wastewater Using Natural Pyrite Ore by Heterogeneous Fenton Process

Öztürk¹

2021

Proceedings of the 7th World Congress on New Technologies

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In this study, it was aimed to remove COD from wastewater prepared from a mixture of rhodamine 6G, methyl orange, and crystal violet dyes using natural pyrite ore as a heterogeneous fenton catalyst. The parameters of pH (2-9), H2O2 concentration (0.5-5 g/L), and catalyst dosage (0.5-5 g/L), which are thought to have major effects on the heterogeneous fenton process in COD removal, were investigated in a batch system. Characterization studies of natural pyrite ore were performed by X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-Ray Spectroscopy (EDX), and Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy analyses. According to the data obtained, optimum values were determined as pH of 2, H2O2 concentration of 2 g/L, and 1.5 g/L of catalyst dosage. The COD removal efficiency was calculated as 94.7% under optimum conditions. According to the characterization results, it was determined that the pyrite ore contains (wt. %) Fe (44.87%) and S (51.02%) in a major proportion. The pyrite ore had a well crystalline and irregular structure. The fingerprint bands such as Fe-O, Fe-S are determined by FTIR spectrum. Pyrite was found as an effective catalyst for COD removal in this study and can be used as a promising catalyst in future heterogeneous fenton studies by expanding its catalyst property.

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Section: Effect Of Wastewater Ph and Timementioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

COD Removal from Mixed Dye Wastewater Using Natural Pyrite Ore by Heterogeneous Fenton Process

Öztürk¹

2021

Proceedings of the 7th World Congress on New Technologies

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“…To further investigate the feasibility of treating Synozol Blue dye wastewater on a large scale, a continuous-flow laboratory-scale experiment was examined as an indication for practical application (Ashour and Tony 2017;Wang et al 2021). A stock solution of Synozol Blue dye wastewater was pumped at various volumetric flow rates at a steady rate to a container under the UV reactor that is the same as in the batch experiment and stirred with a magnetic stirrer.…”

Section: Continuous-flow Performancementioning

confidence: 99%

“…Notably, advanced oxidation processes (AOPs) as chemical oxidation technology are gaining a considerable scientists' attention for reclaiming dye contaminating water since they are green choice, simple in operation and reliable for practical applications (Wang et al 2021). The emerging field of AOPs is based on either heterogeneous or homogeneous mixture consisting of a strong oxidizing agent and transition metal.…”

Section: Introductionmentioning

confidence: 99%

End-of-life waste criteria: synthesis and utilization of Mn–Zn ferrite nanoparticles as a superparamagnetic photocatalyst for synergistic wastewater remediation

Tony

Eltabey

2022

Appl Water Sci

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Dyes are toxic compounds that are widely included in industrial discharge. Their efficient and economical remediation can be explored through Fenton’s oxidation. Mn0.6Zn0.4Fe2O4 nanoparticles are prepared via a simple and efficient co-precipitation technique and its chemical composition is confirmed through X-ray diffraction and its morphology via high-resolution transmission electron microscope. The prepared superparamagnetic photocatalyst based on Mn0.6Zn0.4Fe2O4 is applied for almost complete Synozol Blue dye removal (98% dye removal and 87% COD removal) and the results confirmed that the process is an efficient sustainable technique for the easily magnetically recoverable catalyst. Central composite design analysis was chosen to optimize the parametric conditions of the magnetized Fenton’s variables through 13-level of a quadratic model. The optimized system variables were attained at 39 and 404 mg L−1 for catalyst and H2O2, respectively, at pH 3.0 with model correlation coefficients over than 98%. Recover and reuse are a viable option for ‘close the loop’ waste after final treatment as an ‘end-of-life’ waste potential and high removal efficiency is attained up to the 8th cycle of catalyst reuse. Kinetics of Synozol Blue oxidation fitted through the first-order kinetic model. Finally, the thermodynamic parameters values concluded that the process is non-spontaneous and endothermic in nature.

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“…In this study, the target pollutant was selected as dye wastewater due to its toxicity, carcinogenicity, and poor biodegradability. 24,25 Herein, the feasibility of the OP/sodium sulfite (SS) system and its influential factors were explored through the decolorization performance of rhodamine B (RB). Then the RB degradation efficiencies of OP/SS and acid-washed pyrite (AWP)/SS systems were compared at different pH 0 values, and the degradation mechanism of OP/SS was described in the presence of oxygen.…”

Section: Introductionmentioning

confidence: 99%

Sulfite activation by oxidized pyrite for dye degradation assisted by oxygen

Guang-jun

Zhong

2022

New J. Chem.

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A novel strategy for enhancing heterogeneous Fenton degradation of dye wastewater using natural pyrite: Kinetics and mechanism

Cited by 83 publications

References 50 publications

COD Removal from Mixed Dye Wastewater Using Natural Pyrite Ore by Heterogeneous Fenton Process

COD Removal from Mixed Dye Wastewater Using Natural Pyrite Ore by Heterogeneous Fenton Process

End-of-life waste criteria: synthesis and utilization of Mn–Zn ferrite nanoparticles as a superparamagnetic photocatalyst for synergistic wastewater remediation

Sulfite activation by oxidized pyrite for dye degradation assisted by oxygen

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