Electrochemical treatment of chemical oxygen demand in produced water using flow‐by porous graphite electrode

Abdel-Salam, Omar E.; Abou‐Taleb, Enas M.; Afify, Ahmed A

doi:10.1111/wej.12336

Cited by 15 publications

(4 citation statements)

References 14 publications

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“…In this work, a secondary anodic oxidation method was used to convert Ti electrodes into Ti/ TiO 2 nanotube array electrodes with a high-efficiency contact area and multiple active sites. The preparation method is simple and easy to achieve in a short time, without any complex procedures and expensive instruments, compared to the detection method of photoelectrocatalysis (Li et al 2006a(Li et al , 2006b(Li et al , 2007Zhang et al 2009), the instruments for preparation (Li et al 2006a(Li et al , 2006b(Li et al , 2007Zhang et al 2009;Ma et al 2011;Mo et al 2015;Kabir et al 2019;Diksy et al 2020), and the preparation time (Li et al 2006a(Li et al , 2006b(Li et al , 2007Zhang et al 2009;Ma et al 2011;Mo et al 2015;Abdel-Salam et al 2018;Carchi et al 2019;Diksy et al 2020). The effect of the types and ratios of the organics on COD measurement by the Ti/TiO 2 electrode method was studied and discussed in the range of 5-150 mg/L COD.…”

Section: Cod Determination Of Multi-component Solutionmentioning

confidence: 99%

Determination of chemical oxygen demand in mixed organic solution by Ti/TiO2 nanotube array electrode method

Wang

2021

Water Science and Technology

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Chemical oxygen demand (COD) is a significant parameter for analyzing water quality. However, the detection methods still suffer from the problems of secondary pollution, use of harmful substances, complicated operations, etc. To trace these problems, a Ti/TiO2 nanotube array (NTA) electrode was successfully prepared by the secondary anodic oxidation method in this work. The prepared electrode was used to determine COD of single- and multi-component solutions (including aniline, rhodamine B, and potassium hydrogen phthalate). The Ti/TiO2 NTA electrode exhibited higher electrochemical oxidation efficiency than the neat Ti one. The electrocatalytic reactions of the target organics on the electrode surface were confirmed to conform to the first-order kinetic process. Within COD range of 5–150 mg/L, COD value was not only proportional to the anodizing current but also related to organic matter itself. The activation energies of electro-oxidation reaction of different substances were different from each other (An: 14.25 kJ/mol, RhB: 18.56 kJ/mol, and KHP: 35.32 kJ/mol), indicating the differences in their dynamic behaviors on the electrode surface. The related bias obtained for all successive measurements was below ± 5.8%. Therefore, we report a fast, effective, accurate, and well-reproducible COD detection method, which is feasible for both single-component and multiple-component organic solutions.

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Section: Cod Determination Of Multi-component Solutionmentioning

confidence: 99%

Determination of chemical oxygen demand in mixed organic solution by Ti/TiO2 nanotube array electrode method

Wang

2021

Water Science and Technology

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“…The energy consumption is calculated from the following formula (Abdel‐Salam et al, 2018):

italicEC goodbreak= ([], \frac{(T * V * {\frac{A}{S}}_{v}) (1 * 10^{- 3})}{((), ∆ italicCOD * 1 * 10^{- 6})})

where…”

Section: Methodsmentioning

confidence: 99%

Optimization of electro‐oxidation and electro‐Fenton techniques for the treatment of oilfield produced water

Al‐Ameri

Elhassan

Maher³

2022

Water & Environment J

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Electrochemical advanced oxidation processes are the most promising methods for destroying and degrading organic and inorganic pollutants present in produced water effluents. This study presents the electro-oxidation process using graphite electrodes and electro-Fenton process using iron electrodes for the treatment of real produced water. The effect of operating parameters such as current density on chemical oxygen demand (COD) removal efficiency was addressed. The result showed that electro-Fenton process was more efficient than electro-oxidation process where it gave 98% as maximum COD removal efficiency with energy consumption of 1.9 kWh/dm 3 at H 2 O 2 concentration of 12 mM, current density of 10 mA/cm 2 , temperature of 25 C, pH of 3, and treatment time of 80 min compared with 96.9% as maximum COD removal efficiency with energy consumption of 3 kWh/dm 3 at pH of 6, current density of 10 mA/cm 2 , temperature of 40 C, and reaction time of 80 min when using electro-oxidation process. These results demonstrated that electrochemical technologies are very promising methods for the treatment of produced water from oil/gas industry, so it can be safely disposed of or effectively reused for injection and irrigation.

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“…In addition to controlling the discharge of wastewater, it is necessary to remove as many contaminants as possible before discharge. To this end, methods have been developed for treating pollutants in water, including electrochemical [3][4][5], redox [6,7], coagulation [8,9], and photocatalytic methods [10,11]. However, these strategies require complex processes and expensive instruments and have technical limitations that require them to be combined with complementary methods to remove low concentrations of pollutants.…”

Section: Introductionmentioning

confidence: 99%

Effective Magnetic MOFs Adsorbent for the Removal of Bisphenol A, Tetracycline, Congo Red and Methylene Blue Pollutions

Zhang

Sun

et al. 2021

Nanomaterials

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A magnetic metal−organic frameworks adsorbent (Fe3O4@MIL-53(Al)) was prepared by a typical solvothermal method for the removal of bisphenol A (BPA), tetracycline (TC), congo red (CR), and methylene blue (MB). The prepared Fe3O4@MIL-53(Al) composite adsorbent was well characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and fourier transform infrared spectrometer (FTIR). The influence of adsorbent quantity, adsorption time, pH and ionic strength on the adsorption of the mentioned pollutants were also studied by a UV/Vis spectrophotometer. The adsorption capacities were found to be 160.9 mg/g for BPA, 47.8 mg/g for TC, 234.4 mg/g for CR, 70.8 mg/g for MB, respectively, which is superior to the other reported adsorbents. The adsorption of BPA, TC, and CR were well-fitted by the Langmuir adsorption isotherm model, while MB followed the Freundlich model, while the adsorption kinetics data of all pollutants followed the pseudo-second-order kinetic models. The thermodynamic values, including the enthalpy change (ΔH°), the Gibbs free energy change (ΔG°), and entropy change (ΔS°), showed that the adsorption processes were spontaneous and exothermic entropy-reduction process for BPA, but spontaneous and endothermic entropy-increasing processes for the others. The Fe3O4@MIL-53(Al) was also found to be easily separated after external magnetic field, can be a potential candidate for future water treatment.

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Electrochemical treatment of chemical oxygen demand in produced water using flow‐by porous graphite electrode

Cited by 15 publications

References 14 publications

Determination of chemical oxygen demand in mixed organic solution by Ti/TiO2 nanotube array electrode method

Determination of chemical oxygen demand in mixed organic solution by Ti/TiO2 nanotube array electrode method

Optimization of electro‐oxidation and electro‐Fenton techniques for the treatment of oilfield produced water

Effective Magnetic MOFs Adsorbent for the Removal of Bisphenol A, Tetracycline, Congo Red and Methylene Blue Pollutions

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