Treatment of dinitrodiazophenol production wastewater by Fe/C and Fe/Cu internal electrolysis and the COD removal kinetics

Lin, Hua; Lin, Yan; Liu, Liheng

doi:10.1016/j.jtice.2015.06.023

Cited by 32 publications

(16 citation statements)

References 24 publications

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“…From the Table , according to the R 2 values, these three novel pseudo‐kinetic models were better than the classic kinetic models, especially denoting that RB removal by ZVI/Cu IE was rather well followed the pseudo‐second‐order kinetic model. Similar results were obtained on Fe/C and Fe/Cu IE for dinitrodiazophenol degradation (Lin et al, )…”

Section: Resultssupporting

confidence: 87%

“…For the two stages modeling, R 2 values in the second stage (II) of slow reduction were higher than those in the first stage (I) of rapid reduction, suggested that the major RB has been degraded at the second stage, unlike degradation of p‐nitrophenol on ZVI/Cu surface (Lai et al, ). Although the R 2 of the second‐order kinetic model for each dose was above 0.95, however, the C 0cal from the second‐order kinetic model has a large difference with C 0 (50 mg/L), indicating that RB removal was not also described by the second‐order kinetic model, and similar phenomenon was observed on dinitrodiazophenol degradation by Fe/C IE (Lin et al, ).…”

Section: Resultsmentioning

confidence: 76%

“…The first‐order and second‐order model reaction kinetics were applied to evaluate the degradation of RB as described in Equation and , respectively (Lin, Lin, & Liu, ). Furthermore, a two stage reaction of initial stage (0–10 min) and second stage (10–120 min) were hypothesized, and each stage was described by first‐order kinetic model (Lai et al, ).

first - order kinetic model : \ln C_{t} = - k_{1} t + A_{1}

second - order kinetic model : \frac{1}{C_{normalt}} = k_{2} t + A_{2}

where C t and C 0 were the concentration of dyes at reaction time t and 0, k 1 and k 2 were the reaction rate constants of first‐order and second‐order models.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Reductive performance of ZVI/Cu polyscale particle to decolorize reactive black 5

Deng

Zhang

Jiang

et al. 2018

Microscopy Res & Technique

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Based on direct reducing of copper ions by commercially available zero valent iron (ZVI), ZVI/Cu polyscale particles with high activation are synthesized and exhibit significant removal efficiency for reactive black (RB) dye. The ZVI/Cu polyscale particles could maintain a good performance for RB removal at a wide pH range of 3.0-9.0. Different from the mineralization process of other organic pollutants in ZVI/Cu system, the degradation kinetics of RB could be described well by novel pseudo-second kinetic models. Results of scanning electron microscopy (SEM), X-ray fluorescence elemental analysis (EDX), and X-ray diffraction (XRD) show the planting Cu has deposited on the surface of Fe 0 . The characterization of ZVI/Cu particles and RB solution before and after degradation reveals that decolorization of RB is not only resulted from the reduction process including direct reduction by accepting electrons from Fe 0 oxidation and indirect reduction by atomic hydrogen generated on the ZVI/Cu surface, but also the oxidation of hydroxyl radicals in the mineralization procedure of RB dye. K E Y W O R D Sdecolorization of reactive black, reduction, ZVI/cu polyscale particle

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 76%

first - order kinetic model : \ln C_{t} = - k_{1} t + A_{1}

second - order kinetic model : \frac{1}{C_{normalt}} = k_{2} t + A_{2}

where C t and C 0 were the concentration of dyes at reaction time t and 0, k 1 and k 2 were the reaction rate constants of first‐order and second‐order models.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Reductive performance of ZVI/Cu polyscale particle to decolorize reactive black 5

Deng

Zhang

Jiang

et al. 2018

Microscopy Res & Technique

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“…The other effect of usage of Fe 0 may be related to the formation of a micro‐electrolysis system between Fe 0 and the carbon of support. The result of this creation is free hydrogen radicals ( ● H) (Equations and ) that have the ability of high redox potentials breaking down the molecules to small species . Consequently, the addition of Fe 0 to CuFeO 2 /rGO has a strong effect on the catalytic activity of the CuFeO 2 /rGO system and improves its degradation capacity significantly.…”

Section: Resultsmentioning

confidence: 99%

Efficient Fe/CuFeO₂/rGO nanocomposite catalyst for electro‐Fenton degradation of organic pollutant: Preparation, characterization and optimization

Nazari

Setayesh

2019

Applied Organom Chemis

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The nanocomposite of zero‐valent iron and delafossite CuFeO2 supported on reduced graphene oxide was synthesized for the first time to evaluate its performance as the heterogeneous catalyst toward electro‐Fenton (EF) removal of catechol. X‐ray diffraction, Fourier transform‐infrared, scanning electron microscopy and Brunauer–Emmett–Teller (BET) were used to characterize the nanocomposite. It was found that the rhombohedral structure of CuFeO2 remained stable during the nanocomposite preparation. The BET surface area of the nanocomposite increased about 102 times in comparison with bare CuFeO2. The influence of the operating parameters was investigated. The optimum operating conditions were pH 3, Fe/CuFeO2/rGO: 1 g/l; catechol: 7.5 × 10−4 mol/l; and I: 150 mA, which led to 99% and 78.4% catechol and chemical oxygen demand removal in 120 min, respectively. The stability of the catalyst by leaching measurements was studied. Only 2% and 3.1% of iron and copper, respectively, was leached in the solution. The obtained results introduced Fe/CuFeO2/rGO as a stable and appropriate catalyst for removal of organic compounds by the EF process. It was inferred from the scavenger utilization that hydroxyl radical plays a major role in catechol elimination and EF reaction followed by the Haber–Weiss mechanism at optimum conditions. The gas chromatography–mass spectrometry analysis was performed to detect the intermediate products, and an acceptable degradation pathway was proposed. The EF degradation of catechol follows a pseudo‐first‐order kinetics model with a rate constant of 3.69 × 10−2 min−1 for the optimum operating conditions. The reusability of Fe/CuFeO2/rGO was investigated for six cycles, and the catalytic efficiency almost remained.

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“…; Lin et al . ). By far, no work has been reported on the research of the phase and the morphology of FeC MEMs.…”

Section: Introductionmentioning

confidence: 97%

The preparation, characterization of FeC micro‐electrolysis materials using low‐cost biochar and the removal of ultra‐high COD pesticide wastewater

Zhang

Shen

et al. 2017

Water & Environment J

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Two kinds of FeAC micro-electrolysis materials (FeAC MEMs) named Fe 0 /FeAC MEMs and Fe 3 O 4 /FeAC MEMs were prepared using low-cost biochar, chemical grade Fe 0 powder and industrial iron powder. The FeAC MEMs were characterized by XRD, SEM and FT-IR. Meanwhile, the effects of sintering temperatures and mass ratios of Fe to C on the treatment high chemical oxygen demand (COD) pesticide wastewater were studied. The results display that the relative removal rate of COD reached 64% for Fe 0 /FeAC MEMs when the sintering temperature was 4008C and the mass ratio of Fe to C was 1 : 1. For Fe 3 O 4 /FeAC MEMs, and the mass ratio of Fe 3 O 4 to C was 1 : 3, the relative removal rate of COD reached 63.71%. Hence, the chemical grade Fe 0 powder could be replaced with industrial iron powder to achieve the goal of low-cost treatment of the high COD pesticide wastewater. Supporting InformationAdditional Supporting Information may be found in the online version of this article at the publisher's web-siteThe preparation, characterization of FeAC micro-electrolysis materials M. Li et al.

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Treatment of dinitrodiazophenol production wastewater by Fe/C and Fe/Cu internal electrolysis and the COD removal kinetics

Cited by 32 publications

References 24 publications

Reductive performance of ZVI/Cu polyscale particle to decolorize reactive black 5

Reductive performance of ZVI/Cu polyscale particle to decolorize reactive black 5

Efficient Fe/CuFeO₂/rGO nanocomposite catalyst for electro‐Fenton degradation of organic pollutant: Preparation, characterization and optimization

The preparation, characterization of FeC micro‐electrolysis materials using low‐cost biochar and the removal of ultra‐high COD pesticide wastewater

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Treatment of dinitrodiazophenol production wastewater by Fe/C and Fe/Cu internal electrolysis and the COD removal kinetics

Cited by 32 publications

References 24 publications

Reductive performance of ZVI/Cu polyscale particle to decolorize reactive black 5

Reductive performance of ZVI/Cu polyscale particle to decolorize reactive black 5

Efficient Fe/CuFeO2/rGO nanocomposite catalyst for electro‐Fenton degradation of organic pollutant: Preparation, characterization and optimization

The preparation, characterization of FeC micro‐electrolysis materials using low‐cost biochar and the removal of ultra‐high COD pesticide wastewater

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Product

Resources

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Efficient Fe/CuFeO₂/rGO nanocomposite catalyst for electro‐Fenton degradation of organic pollutant: Preparation, characterization and optimization