Degradation of methylene blue and congo-red dyes using Fenton, photo-Fenton, sono-Fenton, and sonophoto-Fenton methods in the presence of iron(II,III) oxide/zinc oxide/graphene (Fe3O4/ZnO/graphene) composites

Saleh, Rosari; Taufik, Ardiansyah

doi:10.1016/j.seppur.2018.08.030

Cited by 172 publications

(53 citation statements)

References 56 publications

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“…This could be because the adsorption process was driven by the electrostatic attraction between adsorbed H+ groups and the anionic dye [6,35], and since L1 and L2 are negatively charge, a repulsion between the anionic dye and the substrate surface will be boosted with an increase in pH, thus, decreasing the binding strength. These results are in agreement with those reported by Saleh et al and Jagusiak et al [1,36].…”

Section: Dye Absorption On Different Phsupporting

confidence: 94%

“…Specifically, wastewater from manufacturing industries that use large amount of dyes are generating abundant quantities of colored wastewater. Due to this, aquatic ecosystems have been severely impacted not only by the toxic, mutagenic and carcinogenic effects but also for the water quality due to changes in nutrients, inorganic sediments, and micropollutants [1][2][3][4]. Congo Red (CR) is an anionic dye that contains a benzidine compound (Figure 1), a carcinogenic and mutagenic substance.…”

Section: Introductionmentioning

confidence: 99%

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Functionalized Leather: A Novel and Effective Hazardous Solid Waste Adsorbent for the Removal of the Diazo Dye Congo Red from Aqueous Solution

Clavijo

Osma

2019

Water

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The leather industry produces a high yield of solid hazardous wastes that generate a major impact on the environment. At the same time, the use of dyes by different manufacturing industries, including the footwear industry, creates large amounts of colored wastewater that is hard to treat. In this paper, potential adsorbents based on the functionalization of solid waste from leather in the removal of anionic dye Congo Red were studied. Twelve different functionalized adsorbents were analyzed in terms of dye removal. From those, the best adsorbents were characterized and tested to determine their life cycle, pH dependency and the resulting phytotoxicity of the treated dye baths. Different kinetic models were evaluated to describe this adsorption process. It was found that functionalized leather adsorbents presented multi-linearity behavior when removing Congo Red. Life cycle analysis showed that the adsorbents presented a high yield of absorption until the third cycle of operation, while phytotoxicity tested showed reductions up to 50% in the toxicity of the treated dye baths.

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Section: Dye Absorption On Different Phsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Functionalized Leather: A Novel and Effective Hazardous Solid Waste Adsorbent for the Removal of the Diazo Dye Congo Red from Aqueous Solution

Clavijo

Osma

2019

Water

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“…As a typical AOP, Fenton reaction is efficient for HO• production, but still faces some limitations, such as the strict acidic pH range (pH < 4) [12,13], formation of iron sludge [14,15], and high cost for catalyst recycling [16,17]. A number of non-ferrous metals, such as copper [18], manganese [19], and titanium [20], have been developed as alternatives.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Mechanistic Study of Rhodamine B Degradation by H2O2 and Cu/Al2O3/g-C3N4 Composite

et al. 2020

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The classic Fenton reaction, which is driven by iron species, has been widely explored for pollutant degradation, but is strictly limited to acidic conditions. In this work, a copper-based Fenton-like catalyst Cu/Al2O3/g-C3N4 was proposed that achieves high degradation efficiencies for Rhodamine B (Rh B) in a wide range of pH 4.9–11.0. The Cu/Al2O3 composite was first prepared via a hydrothermal method followed by a calcination process. The obtained Cu/Al2O3 composite was subsequently stabilized on graphitic carbon nitride (g-C3N4) by the formation of C−O−Cu bonds. The obtained composites were characterized through FT-IR, XRD, TEM, XPS, and N2 adsorption/desorption isotherms, and the immobilized Cu+ was proven to be active sites. The effects of Cu content, g-C3N4 content, H2O2 concentration, and pH on Rh B degradation were systematically investigated. The effect of the catalyst dose was confirmed with a specific reaction rate constant of (5.9 ± 0.07) × 10−9 m·s−1 and the activation energy was calculated to be 71.0 kJ/mol. In 100 min 96.4% of Rh B (initial concentration 20 mg/L, unadjusted pH (4.9)) was removed in the presence of 1 g/L of catalyst and 10 mM of H2O2 at 25 °C, with an observed reaction rate constant of 6.47 × 10−4 s−1. High degradation rates are achieved at neutral and alkaline conditions and a low copper leaching (0.55 mg/L) was observed even after four reaction cycles. Hydroxyl radical (HO·) was identified as the reactive oxygen species by using isopropanol as a radical scavenger and by ESR analysis. HPLC-MS revealed that the degradation of Rh B on Cu/Al2O3/CN composite involves N-de-ethylation, hydroxylation, de-carboxylation, chromophore cleavage, ring opening, and the mineralization process. Based on the results above, a tentative mechanism for the catalytic performance of the Cu/Al2O3/g-C3N4 composite was proposed. In summary, the characteristics of high degradation rate constants, low ion leaching, and the excellent applicability in neutral and alkaline conditions prove the Cu/Al2O3/g-C3N4 composite to be a superior Fenton-like catalyst compared to many conventional ones.

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“…With the assistance of H 2 O 2 , the Fenton agents could generate hydroxyl radicals (•OH) automatically and thus degrade organic matters to CO 2 and H 2 O ultimately [16]. To this end, tremendous efforts have been focused on using alternative catalysts for wastewater treatment such as titanium dioxide (TiO 2 ) [17], cadmium sulphide (CdS) [18], zinc oxide (ZnO) [19], manganese dioxide (MnO 2 ) [20], copper oxide [21], tungsten trioxide (WO 3 ) [22], and iron oxides [23,24], which can effectively degrade organic contaminants by a typical Fenton procedure; the Fenton-like oxidation reactions have been commonly used to produce free radicals via catalyzing H 2 O 2 with ferrous ions (Fe 2+ /Fe 3+ ) in acidic media [25,26]. Typically, the iron oxides nanomaterials could be used as an oxidase to catalytically convert H 2 O 2 to •OH.…”

Section: Introductionmentioning

confidence: 99%

A Fenton-Like Nanocatalyst Based on Easily Separated Magnetic Nanorings for Oxidation and Degradation of Dye Pollutant

Shi

et al. 2020

Materials

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In this study, uniform Fe3O4 magnetic nanorings (Fe3O4-MNRs) were prepared through a simple hydrothermal method. The morphology, magnetic properties, and structure of the product were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM), vibrating sample magnetometer (VSM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), respectively. The Fe3O4-MNRs were used as Fenton-like catalysts in the presence of hydrogen peroxide (H2O2) and showed excellent Fenton-catalytic activity for degradation of organic dyes such as Methylene blue (MB), Rhodamine B (RhB), and Bromophenol blue (BPB). Furthermore, the obtained Fe3O4-MNRs could be recycled after used for several times and still remained in a relative high activity and could rapidly be separated from the reaction medium using a magnet without considerable loss. All results reveal that Fe3O4-MNRs have potential for the treatment of dyes pollutants.

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Degradation of methylene blue and congo-red dyes using Fenton, photo-Fenton, sono-Fenton, and sonophoto-Fenton methods in the presence of iron(II,III) oxide/zinc oxide/graphene (Fe3O4/ZnO/graphene) composites

Cited by 172 publications

References 56 publications

Functionalized Leather: A Novel and Effective Hazardous Solid Waste Adsorbent for the Removal of the Diazo Dye Congo Red from Aqueous Solution

Functionalized Leather: A Novel and Effective Hazardous Solid Waste Adsorbent for the Removal of the Diazo Dye Congo Red from Aqueous Solution

Kinetic and Mechanistic Study of Rhodamine B Degradation by H2O2 and Cu/Al2O3/g-C3N4 Composite

A Fenton-Like Nanocatalyst Based on Easily Separated Magnetic Nanorings for Oxidation and Degradation of Dye Pollutant

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