Comparative removal of Magenta MB from aqueous solution by homogeneous and heterogeneous photo-Fenton processes

Xavier, Shilpa; Gandhimathi, R.; Nidheesh, P.V.; Ramesh, S.

doi:10.1080/19443994.2015.1054887

Cited by 22 publications

(4 citation statements)

References 39 publications

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“…It is shown that the demand for electric energy to treat real wastewaters is much higher in comparison to single compounds, as is the amount of reagents required to degrade the organic carbon. These results were in agreement with the work of Xavier et al [47], who observed that the application of an excess of Fe 2+ increased the scavenging reactions and decreased the efficiency of the photo-Fenton process in the degradation of Magenta MB. Parallel to the kinetic rate, the energy consumption was determined to evaluate the feasibility of the reactor.…”

Section: Effect Of Fe 2+ Concentrationsupporting

confidence: 93%

Degradation of Agro-Industrial Wastewater Model Compound by UV-A-Fenton Process: Batch vs. Continuous Mode

Jorge

Teixeira

Fernandes

et al. 2023

IJERPH

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The degradation of a model agro-industrial wastewater phenolic compound (caffeic acid, CA) by a UV-A-Fenton system was investigated in this work. Experiments were carried out in order to compare batch and continuous mode. Initially, batch experiments showed that UV-A-Fenton at pH 3.0 (pH of CA solution) achieved a higher generation of , leading to high CA degradation (>99.5%). The influence of different operational conditions, such as H2O2 and Fe2+ concentrations, were evaluated. The results fit a pseudo first-order (PFO) kinetic model, and a high kinetic rate of CA removal was observed, with a [CA] = 5.5 × 10−4 mol/L, [H2O2] = 22 × 10−4 mol/L and [Fe2+] = 1.1 × 10−4 mol/L (kCA = 0.694 min−1), with an electric energy per order () of 7.23 kWh m−3 order−1. Under the same operational conditions, experiments in continuous mode were performed under different flow rates. The results showed that CA achieved a steady state with higher space-times (θ = 0.04) in comparison to dissolved organic carbon (DOC) removal (θ = 0–0.020). The results showed that by increasing the flow rate (F) from 1 to 4 mL min−1, the CA and DOC removal rate increased significantly (kCA = 0.468 min−1; kDOC = 0.00896 min−1). It is concluded that continuous modes are advantageous systems that can be adapted to wastewater treatment plants for the treatment of real agro-industrial wastewaters.

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Section: Effect Of Fe 2+ Concentrationsupporting

confidence: 93%

Degradation of Agro-Industrial Wastewater Model Compound by UV-A-Fenton Process: Batch vs. Continuous Mode

Jorge

Teixeira

Fernandes

et al. 2023

IJERPH

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“…Recently, electrochemical sludge was used effectively to activate PMS for the removal of nanomaterials from water. [114] In addition to the classic Fenton process, electro-Fenton, [115] sono-Fenton, [116] and photo-Fenton [117] technologies have gained prominence in recent decades. The classic Fenton process which uses iron in soluble form suffers from various limitations including the requirement of acidic pH 3, generation of iron sludge which further needs treatment to safe disposal.…”

Section: Advanced Oxidation Processesmentioning

confidence: 99%

Treatment of Integrated Steel Plant Wastewater Using Conventional and Advanced Techniques

Kumar

Gopinath

Ranjith

et al. 2022

CLEAN Soil Air Water

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The integrated steel industry is considered as one of the important industrial sectors, and its outputs are inputs for other sectors including construction, engineering, medical and scientific equipment, and defence. Massive production, consumption, and export of steel signify a country's economic index. This review outlines the World's steel production quantities, the processes involved, and wastewater generation from the industry and its treatment. Wastewater generated from steel plants is highly complex and requires intensive treatment before discharge into natural water bodies. Technologies adopted for treating wastewater generated from steel industries are deliberated, focusing on coking wastewater treatment. Microbial mediated processes provide an effective means of degrading the contaminants, but the toxicity of certain compounds during higher pollutant load inhibits its further treatment. However, these processes can be integrated with either electrochemical technologies or advanced oxidation processes (AOPs), which can reduce the toxicity level. Hence, when a highly concentrated and complex mixture of contaminants is considered, an integrated approach is a resourceful option in terms of cost‐effectiveness and treatment efficiency.

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“…To overcome these disadvantages, advanced oxidation processes (AOPs) should be preferentially used. Among these AOPs are, photocatalysis, [10][11][12] electrocatalysis, 13 photo-electrocatalysis, 14 electro-Fenton, [15][16][17][18] Fenton, 19,20 peroxicoagulation, 21,22 photo-Fenton, 23 sono-Fenton, 24 sonochemical methods, 25 hydrodynamic cavitation, 26 zero valent metals based AOPs, 27,28 and oxidation processes based on the use of radicals (SO 4 −• , OH • ). 29,30 However, the oxidation by the radicals…”

Section: Introductionmentioning

confidence: 99%

“…To overcome these disadvantages, advanced oxidation processes (AOPs) should be preferentially used. Among these AOPs are, photocatalysis, electrocatalysis, photo‐electrocatalysis, electro‐Fenton, Fenton, peroxicoagulation, photo‐Fenton, sono‐Fenton, sonochemical methods, hydrodynamic cavitation, zero valent metals based AOPs, and oxidation processes based on the use of radicals (SO 4 −• , OH • ) . However, the oxidation by the radicals of sulfate SO 4 −• attracted a lot of attention because of the high oxidation potential that is expected at 2.01 V compared to others radicals .…”

Section: Introductionmentioning

confidence: 99%

Polyaniline coated hematite sand supported on graphene oxide (HS@PANI‐GO) as a new magnetic material for advanced catalytic oxidation based on sulfate radicals: optimization using response surface methodology

Fakir

Anfar

Benafqir

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: We report here on the synthesis of a new magnetic and natural material: polyaniline coated hematite sand supported on graphene oxide (HS@PANI-GO) which was used as an heterogeneous catalyst to activate persulfate (PS) for aqueous solution Orange G (OG) degradation. RESULTS:The characterization results have revealed that the hematite sand is rich in iron oxide, and the inorganic particles were well coated with polyaniline and successfully dispersed in graphene oxide. Further, catalytic oxidation experiments demonstrated that HS@PANI-GO material exhibited high activity in the PS activation for the OG degradation. It was found that complete OG removal from aqueous solution was achieved in 90 min at natural pH. In addition, the influence of various reaction conditions such as temperature, concentration of PS, catalyst dose, pH and decomposition time over the HS@PAN-GO/PS system were investigated and optimized. The catalyst HS@PAN-GO could be recycled easily by a magnet with good reusability. Finally, the effects of various parameters such as PS concentration, catalyst dose, initial OG concentration, and contact time, were investigated using the response surface methodology (RSM). It transpires that the experimental elimination of OG is 98.14%, as obtained under optimal conditions, was very close to the predicted value (96.58%) determined by RSM. CONCLUSION: This study provides a promising way for the activation of green oxidant 'PS', by using a new magnetic composite suited for environmental remediation and oxidation catalysis. RESULTS AND DISCUSSIONS CharacterizationThe crystalline structures of the various materials as determined by XRD are shown in Fig. 1. (JCPDS NO 33-0664). According to the XRD profile, the majority of the peaks observed at 2 = 24.19 ∘ , Figure 2. Scanning electron microscopy (SEM) images of (a, b) HS and (c, d) of HS@PANI.

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Comparative removal of Magenta MB from aqueous solution by homogeneous and heterogeneous photo-Fenton processes

Cited by 22 publications

References 39 publications

Degradation of Agro-Industrial Wastewater Model Compound by UV-A-Fenton Process: Batch vs. Continuous Mode

Degradation of Agro-Industrial Wastewater Model Compound by UV-A-Fenton Process: Batch vs. Continuous Mode

Treatment of Integrated Steel Plant Wastewater Using Conventional and Advanced Techniques

Polyaniline coated hematite sand supported on graphene oxide (HS@PANI‐GO) as a new magnetic material for advanced catalytic oxidation based on sulfate radicals: optimization using response surface methodology

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