Construction and Testing of a Novel in-situ Photoelectro-Fenton System Based on an Arrangement of a Carbon Sponge and a Carbon Steel Plate

A novel photoelectro-Fenton system was built by coupling a carbon sponge (CS) with a carbon steel plate (CSP). When this system contacts a solution containing orange II dye (OGII) under ultraviolet (UV) irradiation, 68% of the solution color was removed compared with 0% without UV irradiation. The tests indicate that the CS-CSP arrangement releases iron ions, a phenomenon associated with the removal of 23% of the solution color, a percentage similar to that obtained when Fe<sup>2+</sup> and Fe<sup>3+</sup> salts are directly placed into the dye solution. The identification of oxidizing free radicals and the color removal percentages indicate that the CS-CSP coupling can operate as in situ Fenton process.

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Degradation of Azo Dye Orange II in Aqueous Solution by Homogeneous UV-Fenton Process with Low Concentration of Fe3+ as Catalyst

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.39.116 ◽

2010 ◽

Vol 39 ◽

pp. 116-119

Author(s):

Jian Xin Chen ◽

Zhao Ji Hu ◽

Xue Xia Yuan ◽

Yan Hong Yao ◽

Jun Li

Keyword(s):

Dye Degradation ◽

Uv Light ◽

Good Alternative ◽

Homogeneous Catalyst ◽

Orange Ii ◽

Fenton Process ◽

Low Concentration ◽

Metallic Salts ◽

Initial Ph ◽

Fenton System

In this paper, degradation of Orange II by homogeneous UV-Fenton process with low concentration of Fe3+ as catalyst was detected. And the effects of UV light wavelength, initial pH and reaction temperature on degradation of Orange II in homogeneous UV-Fenton system were studied in detail. It was found that the arithmetic sum of the rate constants of dye degradation in Fenton and UV-H2O2 and UV was much lower than that in UV-Fenton system with low concentration of Fe3+ as catalyst. The result showed that using low concentration of metallic salts as homogeneous catalyst would be a good alternative in UV-Fenton system for wastewater treatment.

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The catalytic process of poly-silicate-ferric (PSF) and generation mechanism of hydroxyl radical based on photo-Fenton system

Water Science & Technology ◽

10.2166/wst.2020.150 ◽

2020 ◽

Vol 81 (4) ◽

pp. 709-719

Author(s):

Zhiqing Liu ◽

Jianxin Chen ◽

Jianxi Zhu ◽

Lizhang Liu ◽

Zili Jiang

Keyword(s):

Hydroxyl Radical ◽

Photoelectron Spectroscopy ◽

Diffuse Reflectance Spectroscopy ◽

Generation Mechanism ◽

Catalytic Process ◽

Orange Ii ◽

Iron Ions ◽

Ferrous Ions ◽

X Ray ◽

Fenton System

Abstract Poly-silicate-ferric (PSF) was developed as an heterogeneous UV-Fenton catalyst, which was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), UV-vis diffuse reflectance spectroscopy (DRS), Brunauer–Emmett–Teller (BET) and scanning electron microscopy (SEM). The catalytic process of PSF and generation mechanism of hydroxyl radical based on photo-Fenton system were studied in detail. In the heterogeneous UV-Fenton system, the kapp value of Orange II degradation was as high as 0.268 min−1, which was 1.5 times compared to that with α-FeOOH as catalyst. As a result, the Orange II decolouration and mineralization rates were as high as 99.9% and 92.5% after 40 min treatment, respectively. Moreover, the hydroxyl radical concentration would increase to a peak value of 13.4 μmol/L at about 15 min. The fundamental cause of the high hydroxyl radical generation lay in the high release ability of iron ions from PSF. The peak concentrations of total iron ions and ferrous ions could increase to 4.53 mg/L and 1.57 mg/L at 20 min and 10 min, respectively. After treatment, the re-adsorption of iron ions on the surface of PSF could avoid the additional pollution caused by iron ions. The results confirmed that PSF was a high activity catalyst for an heterogeneous UV-Fenton system.

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Proof test for creep quality of carbon steel plate of boiler plate quality

10.3403/10027510u ◽

2020 ◽

Keyword(s):

Carbon Steel ◽

Steel Plate ◽

Plate Quality

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Proof test for creep quality of carbon steel plate of boiler plate quality

10.3403/10027510 ◽

2020 ◽

Keyword(s):

Carbon Steel ◽

Steel Plate ◽

Plate Quality

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Research on Detection Mechanism of Weld Defects of Carbon Steel Plate Based on Orthogonal Axial Eddy Current Probe

Sensors ◽

10.3390/s20195515 ◽

2020 ◽

Vol 20 (19) ◽

pp. 5515

Author(s):

Linnan Huang ◽

Chunhui Liao ◽

Xiaochun Song ◽

Tao Chen ◽

Xu Zhang ◽

...

Keyword(s):

Carbon Steel ◽

Eddy Current ◽

Steel Plate ◽

Difficult Problem ◽

Eddy Current Testing ◽

Detection Sensitivity ◽

Detection Mechanism ◽

Current Testing ◽

Weld Defects ◽

Lift Off

The uneven surface of the weld seam makes eddy current testing more susceptible to the lift-off effect of the probe. Therefore, the defect of carbon steel plate welds has always been a difficult problem in eddy current testing. This study aimed to design a new type of eddy current orthogonal axial probe and establish the finite element simulation model of the probe. The effect of the probe structure, coil turns, and coil size on the detection sensitivity was simulated. Further, a designed orthogonal axial probe was used to conduct a systematic experiment on the weld of carbon steel specimens, and the 0.2 mm width and 1 mm depth of weld defects of carbon steel plates were effectively detected. The experimental results showed that the new orthogonal axial eddy current probe effectively suppressed the unevenness effect of the weld surface on the lift-off effect during the detection process.

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In situ preparation of metal-free cPANI-GP electrode and catalytic performance in an electro-Fenton system

Journal of the Iranian Chemical Society ◽

10.1007/s13738-021-02175-2 ◽

2021 ◽

Author(s):

Xuefei Huang ◽

Yonggang Zhang

Keyword(s):

Catalytic Performance ◽

Metal Free ◽

In Situ Preparation ◽

Fenton System

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Design an Epoxy Coating with TiO2/GO/PANI Nanocomposites for Enhancing Corrosion Resistance of Q235 Carbon Steel

Materials ◽

10.3390/ma14102629 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2629

Author(s):

Shimin Chen ◽

Bo Li ◽

Rengui Xiao ◽

Huanhu Luo ◽

Siwu Yu ◽

...

Keyword(s):

Carbon Steel ◽

Photocurrent Density ◽

Photoelectrochemical Performance ◽

Q235 Steel ◽

Protective Barrier ◽

Barrier Coating ◽

Pani Composite ◽

Steel Protection ◽

Q235 Carbon Steel

In this work, a ternary TiO2/Graphene oxide/Polyaniline (TiO2/GO/PANI) nanocomposite was synthesized by in situ oxidation and use as a filler on epoxy resin (TiO2/GO/PANI/EP), a bifunctional in situ protective coating has been developed and reinforced the Q235 carbon steel protection against corrosion. The structure and optical properties of the obtained composites are characterized by XRD, FTIR, and UV–vis. Compared to bare TiO2 and bare Q235, the TiO2/GO/PANI/EP coating exhibited prominent photoelectrochemical properties, such as the photocurrent density increased 0.06 A/cm2 and the corrosion potential shifted from −651 mV to −851 mV, respectively. The results show that the TiO2/GO/PANI nanocomposite has an extended light absorption range and the effective separation of electron-hole pairs improves the photoelectrochemical performance, and also provides cathodic protection to Q235 steel under dark conditions. The TiO2/GO/PANI/EP coating can isolate the Q235 steel from the external corrosive environment, and may generally be regarded a useful protective barrier coating to metallic materials. When the TiO2/GO/PANI composite is dispersed in the EP, the compactness of the coating is improved and the protective barrier effect is enhanced.

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