Oxidative Degradation of Methylene Blue via PDS-Based Advanced Oxidation Process Using Natural Pyrite

Sun, Liqin; Hu, Dehao; Zhang, Ziyu; Deng, Xiaoyan

doi:10.3390/ijerph16234773

Cited by 52 publications

(18 citation statements)

References 40 publications

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“…However, this Fenton method has some drawbacks including the specific pH working range and Fe sludge precipitation at the end of the Fenton reaction [18,19]. Another alternative way to generate radicals with a wider pH working range is by using persulfate salts [20][21][22][23][24][25][26]. Persulfate salts can come from two types: peroxymonosulfate (HSO 5 − ) and peroxydisulfate (S 2 O 8 2− ), both of which contain an O-O bond (peroxide group) capable of generating •SO 4 − radicals and •OH radicals in Fenton-like reaction for degradation of organic compounds [27,28].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

Wen

Lai

et al. 2022

Catalysts

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In this study, Chalcopyrite (CuFeS2) was prepared by a hydrothermal and co-precipitation method, being represented as H-CuFeS2 and C-CuFeS2, respectively. The prepared CuFeS2 samples were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy mapping (EDS-mapping), powder X-ray diffractometer (XRD), X-ray photoelectron spectrometry (XPS), and Raman microscope. Rhodamine B (RhB, 20 ppm) was used as the target pollutant to evaluate the degradation performance by the prepared CuFeS2 samples. The H-CuFeS2 samples (20 mg) in the presence of Na2S2O8 (4 mM) exhibited excellent degradation efficiency (98.8% within 10 min). Through free radical trapping experiment, the major active species were •SO4− radicals and •OH radicals involved the RhB degradation. Furthermore, •SO4− radicals produced from the prepared samples were evaluated by iodometric titration. In addition, one possible degradation mechanism was proposed. Finally, the prepared H-CuFeS2 samples were used to degrade different dyestuff (rhodamine 6G, methylene blue, and methyl orange) and organic pollutant (bisphenol A) in the different environmental water samples (pond water and seawater) with 10.1% mineral efficiency improvement comparing to traditional Fenton reaction.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

Wen

Lai

et al. 2022

Catalysts

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“…Due to its significant toxicity, MB dye is dangerous to human health over a certain concentration . MB is non-biodegradable and may cause destructive impacts on the environment. , Therefore, care must be taken while using MB.…”

Section: Resultsmentioning

confidence: 99%

“…50 MB is non-biodegradable and may cause destructive impacts on the environment. 51,52 Therefore, care must be taken while using MB.…”

Section: Effect Of Salinitymentioning

confidence: 99%

Adsorption Characteristics of a Cationic Gemini Surfactant on Carbonate Outcrops: Adsorption Reduction Using Methylene Blue

et al. 2023

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Surfactant adsorption has been a great challenge for surfactant-based chemically enhanced oil recovery (cEOR) techniques as it directly reflects the overall efficiency of a cEOR project. The static adsorption of an in-house-synthesized cationic Gemini surfactant (GS12) has been investigated on carbonate outcrops as a function of concentration, time, salinity, and temperature. Three different types of carbonate outcrop samples taken from the Al-Lidam area with an increasing percentage of silica and clay impurities were investigated. It was found that the higher the presence of silicate and clay minerals in the carbonate outcrops, the higher will be the surfactant adsorption. The adsorption of GS12 was found to decrease at elevated temperatures and in a highly saline environment, especially at very high concentrations of divalent salts (CaCl 2 and MgCl 2 ). In addition, a novel adsorption inhibitor�methylene blue�has been proposed in this study, which reduced the surfactant adsorption dramatically on carbonate outcrops. The GS12 adsorption on carbonate samples 1, 2, and 3 was reduced to 0.14 mg/g-rock, 0.48 mg/g-rock, and 2.31 mg/g-rock, respectively, by the addition of 500 ppm methylene blue in a 1500 ppm surfactant solution. Moreover, curve fitting was also performed to analyze the adsorption isotherm and kinetic data. Redlich−Peterson and pseudo-second-order models were found to be the best to describe the adsorption isotherm and kinetics, respectively.

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“…The oxidation efficiency of contaminants in such a system, regarded as the pyrite-Fenton process, was not high enough for water/wastewater treatment [ 13 ]; although, some progresses have been made in pyrite-based advanced oxidation processes (AOPs) [ 14 ]. Usually, exogenous oxidant (H 2 O 2 [ 15 ], CaO 2 [ 16 ], persulfate [ 16 , 17 ], etc.) is still needed to gain efficient and rapid oxidation of the target contaminants.…”

Section: Introductionmentioning

confidence: 99%

Molecular Oxygen Activation by Citric Acid Boosted Pyrite–Photo–Fenton Process for Degradation of PPCPs in Water

Guo

Zhang

et al. 2023

Molecules

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Pyrite has been used in photo-Fenton reactions for the degradation of pollutants, but the application of photo-Fenton processes with extra H2O2 in real water/wastewater treatment has still been limited by the economic cost of H2O2 and artificial light sources. Herein, citric acid (CA) and simulated/natural sunlight are used to develop a pyrite-based photo-Fenton system (pyrite–CA–light) in situ generating H2O2 through the enhanced activation of molecular oxygen. The degradation of pharmaceuticals and personal care products (PPCPs), especially acetaminophen (APAP) as the main target pollutant, in the pyrite–CA–light system was investigated. The effects of influencing factors such as various organic acids, APAP concentration, pH, pyrite dosage, CA concentration and co-existing anions (HCO3–, Cl−, NO3–, SO42− and H2PO4−) were examined. At a pyrite dosage of 0.1 g L−1, CA concentration of 0.6 mM and an initial pH of 6.0, the degradation efficiency of APAP (30 μM) was 99.1% within 30 min under the irradiation of xenon lamp (70 W, λ ≥ 350 nm). Almost the same high efficiency of APAP degradation (93.9%) in the system was achieved under natural sunlight irradiation (ca. 650 W m−2). The scavenging experiments revealed that the dominant active species for degrading APAP was hydroxyl radical (HO•). Moreover, a quantitative structural–activity relationship (QSAR) model for pseudo-first-order rate constants (kobs) was established with a high significance (R2 = 0.932, p = 0.001) by using three descriptors: octanol–water partition coefficient (logKow), dissociation constant (pKa) and highest occupied molecular orbital (HOMO). This work provides an innovative strategy of the photo-Fenton process for the degradation of PPCPs using natural minerals and ordinary carboxylic acid under sunlight.

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Oxidative Degradation of Methylene Blue via PDS-Based Advanced Oxidation Process Using Natural Pyrite

Cited by 52 publications

References 40 publications

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B

Adsorption Characteristics of a Cationic Gemini Surfactant on Carbonate Outcrops: Adsorption Reduction Using Methylene Blue

Molecular Oxygen Activation by Citric Acid Boosted Pyrite–Photo–Fenton Process for Degradation of PPCPs in Water

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