Oxalic acid mineralization by electrochemical oxidation processes

Huang, Yao-Hui; Shih, Yu Jen; Liu, Cheng‐Hong

doi:10.1016/j.jhazmat.2011.01.091

Cited by 27 publications

(7 citation statements)

References 24 publications

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“…It can be observed that the increasing of the current density leads to higher abatement of COD (higher RE). This observation is in agreement with results of Yao-Hui Huang et al 43 where OA was incinerated at Ti-DSA anode using an acid medium in the presence of NaCl. Scialdane et al 44 investigated the incineration of OA using IrO 2 -Ta 2 O 3 and BDD anodes, they concluded that a dramatic change of the effect of the current density and of the flow rate on the performance of the process arises when NaCl is added to the system, and these two variables are strongly interrelated.…”

Section: Influence Of Current Density On the Performance Of The Process-supporting

confidence: 93%

Electrochemical Incineration of Oxalic Acid at Manganese Dioxide Rotating Cylinder Anode: Role of Operative Parameters in the Presence of NaCl

Abbar

Salman

Abbas

2016

J. Electrochem. Soc.

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A detailed experimental study was devoted to the anodic oxidation of oxalic acid using manganese dioxide rotating cylinder anode with the objective to evaluate in a systematic way the effect on the oxalic acid oxidation process of several relevant parameters, including the presence of sodium chloride, the current density (J), the rotation speed, the temperature, and the initial concentration of oxalic acid. Thin manganese dioxide film on graphite substrate has been prepared by electrochemical oxidation from MnSO4-H2SO4 electrolyte. The morphology of this electrode was investigated by XRD, SEM, EDS and AFM techniques. The results show that a firm γ-structure of MnO2 film on graphite rod can be obtained successfully. The results indicate that the presence of NaCl has a vital role on the performance of the oxalic acid incineration process. Also current density has the major effect on the removal and current efficiencies. Positive effect of temperature on the removal and current efficiencies and negative effect of rotation speed were observed. The best adopted operative conditions were T = 50°C, J = 40 mA/cm2 and 200 rpm in the presence of 1g/l NaCl where a conversion of about 97% and a current efficiency close to 55% with energy consumption less than 28 kWh(kg of COD)−1 were obtained after four hours of electrolysis time. The findings of the present research validate that incineration of oxalic acid can be carried out successfully on MnO2 anode.

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Section: Influence Of Current Density On the Performance Of The Process-supporting

confidence: 93%

Electrochemical Incineration of Oxalic Acid at Manganese Dioxide Rotating Cylinder Anode: Role of Operative Parameters in the Presence of NaCl

Abbar

Salman

Abbas

2016

J. Electrochem. Soc.

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“…The rate constant reported in Table 1 increased from 0.0091 to 0.011 min -1 ; when NaCl concentration rose from 1 to 5 g/L, the values of R 2 varied between 0.9953 and 0.9994 for different chloride concentrations. Huang et al [27] found the same linear relationship between the rate constant and chloride concentration when OA degraded, using a Ti-DAS net anode. OA removal efficiency increased from 88 to 94 %, as NaCl concentration increased from 1 to 5 g/L (Table 1).…”

Section: Indirect Electrochemical Oxidation Kineticsmentioning

confidence: 69%

A Kinetic Study of Oxalic Acid Electrochemical Oxidation on a Manganese Dioxide Rotating Cylinder Anode

Abbar¹,

Abbas²

2018

Port. Electrochim. Acta

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This paper deals with the theory and kinetics of oxalic acid electrochemical oxidation, in an acidic solution containing sodium chloride, using a manganese dioxide rotating cylinder anode. Voltammetric and galvanostatic electrolysis techniques were used. The voltametric study shows a higher anodic wave corresponding to chlorine oxidation on the MnO2 electrode, prevailing oxalic acid indirect oxidation. Galvanostatic electrolysis studies confirmed that the rate constant is affected by chloride concentration, current density, agitation and temperature. Electrochemical oxidation rate was found to be a pseudo-first order kinetic process. A strongly linear relationship between the rate constant and chloride concentration was observed, while polynomial relations, with respect to current density and temperature, were found. The activation energy was found to be 14.541 kJ/mol, which suggests a diffusion control kinetic step in oxalic acid degradation. The findings of the present research validate that oxalic acid incineration can be successfully carried out on a MnO2 anode, in NaCl presence.

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“…27 Furthermore, titanium-based anodes, such as Ti/Pt, Ti/RuO 2 , and Ti/IrO 2 , provide a stable substrate for catalyst deposition by facilitating the electrochemical oxidation of oxalate ions and resulting in improved oxidation rates and overall efficiency. 16 Niobium-doped boron-doped diamond (Nb/BDD) anodes have displayed promise in the anodic oxidation of oxalic acid because the incorporation of niobium dopants further enhances the electrochemical properties of the anode, which leads to improved oxidation rates. 28 Anodes composed of nanocarbon materials, including carbon nanotubes or graphene, exhibit a high surface area, which bolsters the adsorption and oxidation of oxalate ions and ultimately contributes to improved oxidation rates.…”

Section: Introductionmentioning

confidence: 99%

Demineralization of Oxalic Acid Solutions by Anodic Oxidation in a Stirred Tank Electrochemical Reactor: Experimental and Modeling Study

El Gheriany,

Abdel-Aziz,

El-Ashtoukhy

et al. 2024

Ind. Eng. Chem. Res.

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This study investigates the anodic oxidation of oxalic acid (OA) in wastewater by focusing on a stirred tank electrochemical reactor with a low-cost lead anode. The reactor design, which features a circular array of vertical lead cylinders, aims to enhance the current distribution and mass transfer. Response surface methodology (RSM) is employed to systematically explore the impact of the impeller rotation speed, current density, and initial OA concentration on the efficiency of OA removal. The investigation reveals that impeller rotation speed and current density significantly influence OA removal, while the initial OA concentration exhibits opposing effects. Notably, the study emphasizes the crucial role of contact time and reveals its significant influence on the overall process kinetics and adherence to first-order kinetics. The study also considers the role of sulfate ions in enhancing the electrochemical mineralization of OA. The derived empirical model provides insights into the interplay of operating parameters in influencing the oxidation kinetics. Additionally, the study employs RSM to optimize OA removal efficiency; in ideal circumstances, 96% of the acid was eliminated within a time frame of 2 h. Electrical energy consumed during electrolysis ranged from 2 to 11.4 kWh/kg contingent upon the specific operational parameters. The findings contribute to the design of efficient and environmentally friendly wastewater treatment processes for OA removal in diverse industrial applications. The merits of the present reactor compared with the traditional parallel plate cell are outlined.

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Oxalic acid mineralization by electrochemical oxidation processes

Cited by 27 publications

References 24 publications

Electrochemical Incineration of Oxalic Acid at Manganese Dioxide Rotating Cylinder Anode: Role of Operative Parameters in the Presence of NaCl

Electrochemical Incineration of Oxalic Acid at Manganese Dioxide Rotating Cylinder Anode: Role of Operative Parameters in the Presence of NaCl

A Kinetic Study of Oxalic Acid Electrochemical Oxidation on a Manganese Dioxide Rotating Cylinder Anode

Demineralization of Oxalic Acid Solutions by Anodic Oxidation in a Stirred Tank Electrochemical Reactor: Experimental and Modeling Study

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