Degradation of tyrosol by a novel electro-Fenton process using pyrite
Tyrosol (TY) is one of the most abundant phenolic components of olive oil mill wastewaters. Here, the degradation of synthetic aqueous solutions of 0.30 mM TY was studied by a novel heterogeneous electro-Fenton (EF) process, so-called EF-pyrite, in which pyrite powder was the source of Fe(2+) catalyst instead of a soluble iron salt used in classical EF. …
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Electrochemical mineralization of the antibiotic Levofloxacin …
Based on the analysis of the catalytic mechanism in the HEF process by pyrite (FeS2), goethite (α-FeOOH), and magnetite (Fe3O4) and the geochemistry analysis of these natural iron-bearing ...
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Pyrite as a sustainable catalyst in electro-Fenton process for
The degradation of 0.20 mM sulfamethazine (SMT) solutions was investigated by heterogeneous electro-Fenton (EF) process using pyrite as source of Fe(2+) (catalyst) and pH regulator in an undivided electrochemical cell equipped either with a Pt or a BDD anode and carbon-felt as cathode. Effect of pyrite concentration and applied current on the oxidative degradation …
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Decomposition and oxidation of pyrite
At higher temperatures (>about 800 K) or lower oxygen concentrations, pyrite will be transformed by a two-step process: the thermal decomposition of the pyrite to form porous …
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Electrochemical removal of pyrite scale using green …
Pyrite oxidation is the initial step in the dissolution of pyrite structure. Previous studies have shown that Fe 3+ and dissolved oxygen are the essential oxidants involved in …
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Pyrite formation from FeS and H
Our results show that pyrite formation can be mediated at ambient temperature through a microbially catalyzed redox process, which may serve as a model for a postulated primordial iron−sulfur world.
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Degradation of tyrosol by a new electro-Fenton process using pyrite …
The performance of EF-pyrite was 8.6% superior at 50 mA due to self-regulation of soluble Fe2þ by pyrite. The TY decay in this process followed a pseudo-first-order kinetics.
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Copper and Pyrite Separation by Selective Flotation
The copper pyrite separation Process Flowsheet Crushing circuit of a copper pyrite ore. The crushing section shown consists of single stage crushing with a Forced Feed Jaw Crusher. The mine run ore is fed from the …
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Quantitative characterization on multistage formation of …
Numerous studies have shown that in a closed system with limited sulfate availability, pyrite usually exhibits Rayleigh fractionation with progressive increase and broad range of δ 34 S values from biogenic sulfate reduction (Seal, 2006; Hough et al., 2019; Bonnetti et al., 2020; Liu et al., 2023).However, how sulfur isotope values of pyrite distributed across rock …
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Hydrothermal Monodisperse Microspherulite Pyrite: Novel …
Among the available methods to synthesize pyrite (e.g., electrodeposition, 17 chemical bath deposition, 18 chemical vapor deposition, thermal sulfurization, 19 and …
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iron ore electrity process
flow chart iron laterite ore process. flow chart iron laterite ore process. ... fluorspar ore process; pyrite electrity process; lithium mining process en; Crusher Units Biggest largest rock crusher in the world, process crusher, ... can crush ore feed lumps up to 1,2 manufacturer of jaw crusher YouTube Feb 14, ...
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Journal of Water Process Engineering
Although several studies on the performance of mixotrophic denitrification process driven by pyrite and synthetic biodegradable polymers have been conducted, particularly for the treatment of low-salinity waters [28, 29, 31, 35], there is a notable gap in research pertaining to the treatment of high-salinity mariculture wastewater.
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Pyrite as a sustainable catalyst in electro-Fenton process for
The degradation of 0.20 mM sulfamethazine (SMT) solutions was investigated by heterogeneous electro-Fenton (EF) process using pyrite as source of Fe 2+ (catalyst) and pH regulator in an undivided electrochemical cell equipped either with a Pt or a BDD anode and carbon-felt as cathode. Effect of pyrite concentration and applied current on the oxidative …
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A review on electrochemical behavior of pyrite in the froth …
DETA 16 is another organic compound which is used as a pyrite depressant in the flotation process. In the case of Cu-activate pyrite flotation, it was found that DETA causes depression of the pyrite surface through promoting oxidation of Cu(I) to Cu(II) and removing Cu(I)-S species from the surface resulting in a substantial reduction in ...
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The role of silver-enhanced pyrite in enhancing the electrical
1. Introduction. In a previous study, it was shown that the rate of chalcopyrite leaching in ferric sulfate media can be improved in the presence of silver-enhanced pyrite via the Galvanox™ process at 80 °C, and a solution potential of 450 mV vs Ag/AgCl (Nazari et al., 2011).In this process, pyrite samples are pretreated with a minuscule amount of silver.
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Transitional Metal Catalytic Pyrite Cathode Enables …
All-solid-state batteries can enable reversible four lithium ion storage for pyrite (FeS 2) at a cutoff voltage of 1.0–3.0 V. However, strain/stress concentration generating electrode …
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The mechanisms of pyrite oxidation and leaching: A …
This involves the transfer of electrons from the pyrite valence band to the oxide conduction band, which effectively is transfer of an electron from pyrite Fe 2+ to oxide Fe 3+. The process takes place preferentially from pyrite Fe 2+ adjacent to the oxide.
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Effect of temperature and illumination on pyrite …
Exposure of pyrite to photons with an energy equal or larger than the band gap energy heats the material, as most of the photoelectron–hole pairs created by the interaction between photons and pyrite recombine.
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Stability, Structure, and Electronic Properties of …
In the present work, several pyrite/arsenopyrite interfaces are investigated aiming to provide a better understanding of the structure, stability, electronic, and mechanical properties of the interface as an initial step to …
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Excellent treatment effect of actual wastewater from a …
To date, some studies have reported that electro-Fenton process catalyzed by natural pyrite can exhibit satisfactory treatment effect for the wastewater containing refractory pollutants, such as dyes [16], [17] and antibiotics [18], [19]. However, only few studies have focused on the treatment of pesticide-containing wastewater, especially the ...
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Pyrite Oxidation Mechanism by Oxygen in Aqueous Medium
When pyrite is exposed to the environment, due to natural processes or anthropogenic activities, it is oxidized, forming sulfuric acid in the presence of humidity. This …
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Degradation of tyrosol by a novel electro-Fenton process using pyrite
The performance of EF-pyrite was 8.6% superior at 50 mA due to self-regulation of soluble Fe 2+ by pyrite. The TY decay in this process followed a pseudo-first-order kinetics. The absolute rate constant for TY hydroxylation was 3.57 × 10 9 M −1 s −1, as determined by the competition kinetics method.
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Pyrite-mediated advanced oxidation processes: Applications, …
Making pyrite into nanoparticles, assisting by ultrasound and light irradiation, and adding exogenous Fe 3+, organic chelating agents, or biochar is effective to enhance the …
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Degradation of tyrosol by a novel electro-Fenton process using pyrite
Tyrosol (TY) is one of the most abundant phenolic components of olive oil mill wastewaters. Here, the degradation of synthetic aqueous solutions of 0.30 mM TY was studied by a novel heterogeneous electro-Fenton (EF) process, so-called EF-pyrite, in which pyrite powder was the source of Fe 2+ catalyst instead of a soluble iron salt used in classical EF.
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