Electrochemical Oxidation Treatment Research Articles

Electrochemical oxidation treatment of offshore produced water using modified Ti/Sb-SnO2 anode by graphene oxide

To improve Persian gulf severely damaged marine environment and prevent long term exposure risks of toxic chemicals being discharge into the sea, total COD removal of produced water (PW) at a South Pars gas field is proposed by electrochemical oxidation process (EO), using Ti/Sb-SnO2 anode modified with graphene oxide (GO) prepared in a simple and cost effective technique. Comprehensive electrochemical tests, morphological and structural examinations indicated that addition of GO, improved considerably electrocatalytic activity for the fabricated anode, confirmed formation of uniform SnO2 nanoparticles ranging 15−26 nm and presence of reduced GO. Maximum COD removal and energy efficiency for the pre-discharged offshore oxidation process unit was optimized using Box-Behnken methodology in the EO design experiments. For 2 h electrolysis of PW with prepared anodes, software optimized conditions of CD = 10 mA/cm2, pH = 4.00, electrode distances of 10 mm, and predicted 59.96 % COD removal and energy efficiency of 42.83 g/Kwh which were compatible with experimental data of 58.60 % and 42.63 g/Kwh, respectively. COD removal rate equation was a pseudo-first order with a constant rate of 0.006 min−1. Considering offshore platform operational limitations and associated process economics, the optimized EO unit process cost for total COD removal of PW, was estimated at U$5.74/m3.

Electrochemical oxidation of paraben compounds and the effects of byproducts on neuronal activity

Some organic recalcitrant compounds are not degraded by conventional water treatment systems, making necessary the use of advanced technologies to eliminate these substances. Advanced Oxidation Processes (AOPs) have been extensively proposed to remove emerging contaminants aiming potable water reuse, but literature barely addresses neurotoxic effects of AOPs residual byproducts. These processes involve high costs associated with the electricity, maintenance and oxidizing agent used. However, electrochemical AOPs are techniques based on electron transfer, thus being a clean form of energy and very efficient in the degradation of organic pollutants. Parabens are naturally found in plant sources but most are chemically synthesized, requiring careful treatment to not disturb the environment. In this study, a mixture of parabens (10 mg L−1 each) was degraded by an electrochemical oxidation (EO) system with a Ti/Pt anode. Some parameters, such as the current density (25, 75 and 125 A m−2) and the electrolyte type and concentration (1.5, 3.0 and 5.0 g NaCl L−1 and 3.0 g Na2SO4 L−1) were changed. The best results were obtained with 125 A m−2 and 3.0 g NaCl L−1, which led to the complete degradation of the parabens present in the mixture, after 10 min. In addition to these studies neurotoxicity tests were also performed using the solutions of interest, before and after the EO treatment. It was observed, using the reactive oxygen species (ROS) fluorescent indicator H2DCFDA, that the non-treated solution caused an increase in ROS formation with a signal amplitude of 0.84 ± 0.20 above the baseline. After the EO process the parabens mixture did not lead to a significant ROS change.The solution to bridge the problem of high electricity costs may be replacing it with solar energy, low cost catalysts and other treatment processes involving renewable and eco-friendly energy.

Treatment of Municipal Landfill Leachate by Electrochemical Oxidation: Assessing Operating Variables and Oxidation Products

In this study, the electrochemical oxidation treatment of landfill leachate on a boron-doped diamond (BDD) electrode was examined. A factorial design method was applied to evaluate the experimental...

Influence of a MnO2-WC interlayer on the stability and electrocatalytic activity of titanium-based PbO2 anodes

In order to overcome the unsatisfactory stability drawback of titanium-based PbO2-coated anodes used in electrochemical oxidation treatments of refractory organic wastewater, a novel PbO2-coated anode obtained by introducing a tungsten carbide (WC) modified manganese dioxide composite coating (MnO2-WC) via anodic co-deposition in a MnSO4 solution mixed with WC particles as an intermediate is fabricated (Ti/MnO2-WC/β-PbO2). Characterization measurements including scanning electronic microscopy accompanied by energy dispersive X-rays, X-ray diffraction, and X-ray photoelectron spectroscopy are used to analyze the microstructure and chemical composition of the coated anode, including the interlayer coating and superficial coating. The electrochemical and electrocatalytic properties of the interlayer and anode surfaces are analyzed using linear sweep voltammetry, cyclic voltammetry, and electrochemical impedance spectroscopy. Meanwhile, the failure mechanism of the anode coated with the MnO2-WC composite interlayer, and the life-extension mechanism due to introducing the composited interlayer, are determined via accelerated-life tests and a comprehensive failure analysis of the tested samples. The results show that, compared with MnO2, the conductivity of the MnO2-WC interlayer is greatly improved and exhibits higher oxygen evolution potential as well as better electrocatalytic activity. The anodic β-PbO2 grains deposited on the MnO2-WC interlayer surface become finer, more compact and homogeneous. The MnO2-WC composite interlayer increases the number of surface active sites and promotes the electro-crystallization process of the PbO2 surface coatings, which results in thicker PbO2 coatings. As a result, the Ti/MnO2-WC/β-PbO2-coated anode shows better electrocatalytic activity and superior stability in this work, and its accelerated life is more than twice that of Ti/β-PbO2 anodes.

ZnO/TiO2/Ag2Se nanostructures as photoelectrocatalysts for the degradation of oxytetracycline in water

Optimized thin films composed of ZnO nanorods, grown after preliminary electrodeposition and successively coated with 3 layers of TiO2 and decorated with Ag2Se nanoparticles, were prepared onto glass FTO wafers to treat oxytetracycline solutions by photoelectrocatalysis (PEC). The coatings were thoroughly characterized by XRD, Raman and UV/Vis diffuse reflectance spectroscopy, confocal microscopy, FE-SEM, HRTEM, EDX and XPS. The synthesized films had a mean thickness of 1.19 μm, length >500 nm and a bandgap of 1.85 eV, being visible-light photoactive. Good stability and reproducibility was obtained when treating 5 mg dm−3 oxytetracycline solutions in 0.050 M Na2SO4 at pH 5.8, attaining 96.5% antibiotic decay after 360 min at an anodic potential of +1.0 V vs Ag|AgCl under irradiation with a 36-W blue LED lamp. Comparative photocatalysis and electrochemical oxidation treatments revealed an interference between the active sites where the oxidant species were generated, causing an efficiency loss in PEC. The antibiotic was also removed from urban wastewater, thanks to the additional attack of electrogenerated active chlorine, although at a slower rate due to parallel oxidation of the natural organic matter. A degradation route for oxytetracycline is proposed based on the five primary products detected by LC-QToF-MS.

A hybrid treatment process for product recycling from tannery process effluent and soak liquor

The sulfate rich saline tannery effluent (SRSTE) was treated effectively using halophilic bacterial pretreatment followed by electrochemical oxidation (hybrid treatment). Aerobic degradation was done using halophilic bacterial consortia isolated from the tannery soak effluent, resulted in 76 % COD removal after 6 days. The remaining COD was reduced by electrochemical oxidation (EO). In electro oxidation process (without aerobic pretreatment), 24 h of electro-oxidation was needed to complete COD removal. The process efficiency was analysed through Fourier transform infrared spectroscopy (FTIR), high performance liquid chromatography (HPLC), total organic carbon (TOC) and chemical oxygen demand (COD). The reduction of sulfate could not be noticed in presence of halophilic bacteria in aerobic treatment. The energy consumption for COD removal was about 0.343 and 0.020 kW h/g1 in electrochemical oxidation and hybrid treatment process respectively. Besides, chloride loss was also higher in EO when compared to hybrid approach. Hybrid treatment process was proved to be an effective method for treating SRSTE. The mixed salt was recovered and used for dyeing purpose.

A 2.5D Electrode System Constructed of Magnetic Sb–SnO2 Particles and a PbO2 Electrode and Its Electrocatalysis Application on Acid Red G Degradation

A novel electrode consisting of a Ti/PbO2 shell and Fe3O4/Sb–SnO2 particles was developed for electrochemical oxidation treatment of wastewater. Scanning electron microscope (SEM), X-ray diffraction (XRD), the current limiting method, toxicity experiments, and high-performance liquid chromatography were adopted to characterize its morphology, crystal structure, electrochemical properties, the toxicity of the wastewater, and hydroxyl radicals. Acid Red G (ARG), a typical azo dye, was additionally used to test the oxidation ability of the electrode. Results indicated that the 2.5D electrode could significantly improve the mass transfer coefficient and •OH content of the 2D electrode, thereby enhancing the decolorization, degradation, and mineralization effect of ARG, and reducing the toxicity of the wastewater. The experiments revealed that, at higher current density, lower dye concentration and higher temperature, the electrochemical oxidation of ARG favored. Under the condition of 50 mA/cm2, 25 °C, and 100 ppm, the ARG, Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) removal efficiency reached 100%, 65.89%, and 52.52%, respectively, and the energy consumption and the current efficiency were 1.06 kWh/g COD, 8.29%, and energy consumption for TOC and mineralization current efficiency were 3.81 kWh/g COD, 9.01%. Besides, the Fe3O4/Sb–SnO2 particles after electrolysis for 50 h still had remarkable stability. These results indicated that the ARG solution could be adequately removed on the 2.5D electrode, providing an effective method for wastewater treatment.

Electrochemical oxidation treatment of coal tar wastewater with lead dioxide anodes.

In this study, coal tar wastewater was treated by electrochemical oxidation technology using lead dioxide anodes. The influence of operating parameters, including applied current density, electrode gap and initial pH value, on the removal ratio of chemical oxygen demand (COD) was investigated. The results demonstrated that the COD removal ratio reached 90.5% after 3.5 h electrolysis with the current density at 3 A dm-2 and electrode gap at 1.0 cm. Correspondingly, the COD decreased from 5,125 mg L-1 to 487 mg L-1, which fitted the wastewater discharge standards of China, and the specific energy consumption (SECCOD) was 35.3 kWh kgCOD -1. Not only was the COD removal ratio only 77.1% after 2 h electrolysis but the BOD5/COD ratio of the wastewater reached 0.44, which could be biochemically treated, and the SECCOD decreased by 34.3%. Moreover, the main composition of pristine wastewater before and after 2 h electrolysis was analyzed by GC-MS, and the disappearance of macromolecules (such as ethyl-2-pyrenemethanol) and the production of small molecules (such as propane-1,3-diol) could improve the biodegradability of the wastewater. Therefore, electrochemical oxidation for 2 h is a promising alternative for pretreatment of coal tar wastewater prior to biological treatment.

Assessing the efficiency of a pilot-scale GDE/BDD electrochemical system in removing phenol from high salinity waters

Enhanced mineralization of phenol in brines with high chloride content was investigated by employing an electrochemical advanced oxidation treatment that couples anodic oxidation, electrochlorination and electro-Fenton in a single process. Experimental work was carried out in a pilot scale unit with an undivided plate-and-frame cell equipped with a boron-doped diamond anode and a carbon-PTFE gas diffusion electrode as cathode, in batch recirculation mode. The effects of operating conditions on phenol degradation, including current density, air flow rate, water feed flow rate, Fe2+ dosage and pH as well as of the water matrix, were evaluated. Applied current exhibited the greatest effect on phenol degradation/mineralization efficiency. Complete degradation of phenol (of initial concentration 50 mg L−1) was achieved under the near-optimum operating conditions (40 mA cm−2, pH 7, 0.4 m3 h−1 water circulation rate) within 30 min. Both air flow rate and Fe2+ dosage did not show a measurable impact on phenol removal. However, increasing the chloride content of water significantly improved the efficiency of treatment due to the enhanced indirect oxidation by the electrogenerated chlorine. Several trihalomethane intermediates (chloroform, bromodichloromethane) and chlorinated/brominated phenol byproducts forming during treatment, were eliminated after 60 min of processing time.

Oxidation of Different Microporous Carbons by Chemical and Electrochemical Methods

The functionalization of high surface area microporous carbon materials by oxidative treatments receives great interest for multiple applications. The micropore structure of the material and the oxidation method could play an important role in the process. In this work, we analyze and compare the effects of liquid-phase chemical and alternative electrochemical oxidation treatments in the textural and chemical properties of four microporous carbon materials, namely a granular-, cloth- and powder-like activated carbon (AC) and a powdery zeolite templated carbon (ZTC). Particularly, we provide new data on oxidation kinetics and changes on microporosity and surface chemistry of various microporous carbons. Characterization techniques reveal that the extent, textural changes and selectivity of the oxidation greatly depend on the type of microporous material and the oxidation method. The incorporation of surface oxygen groups (SOGs) generally causes a more-or-less significant decrease in the measured micropore volume and the specific surface area. In the studied ACs, the extent of oxidation and BET surface area reduction augment with their micropore volume, and the textural changes seem to be governed by the micropore blockage by SOGs. The disordered microporous structure of these materials is then quite robust towards oxidation, but its heterogeneity may contribute to the lack of selectivity during this process. By contrast, the regular micropore framework of the ZTC is rapidly destroyed even under soft oxidizing conditions, but it is proposed to promote certain selectivity during oxidation. The high reactivity and structural fragility of ZTC are assigned to the weak interconnections and large number of exposed edge sites in its structure. Our results demonstrate the fast oxidation rate of chemical treatments under different conditions, especially in the case of ZTC, what is proposed to restrict the control and to limit the oxidizability and selectivity of these functionalization processes. Contrarily, the electrochemical treatments are proved to better control the kinetics of oxidative functionalization, what may explain the observed higher efficiency and selectivity for SOGs introduction and the minimization of degradation in fragile microporous structures.

Absolute removal of ciprofloxacin and its degraded byproducts in aqueous solution using an efficient electrochemical oxidation process coupled with adsorption treatment technique

Pharmaceutical-based contaminants are the major reasons for morbidity and mortality in aquatic animals and lead to several side effects and diseases in human community. Availability of proper, efficient, and cost-effective treatment technologies is still scarce. In this study, an efficient combined treatment technique (electrochemical oxidation and adsorption processes) was developed for the complete detoxification of most commonly used antibiotic, ciprofloxacin in aqueous solution. Electrochemical degradation of ciprofloxacin was performed using titanium-based tri-metal oxide mesh type anode, and the effective oxidative potential, electrolysis time, and pH for the degradation of ciprofloxacin were thoroughly evaluated. Sulfate, fluoride ions and toxic byproducts generated during electrochemical oxidation of ciprofloxacin were subsequently removed through a simple adsorption treatment using activated charcoal for 90 min. Further, the toxicity of the treated water was assessed with the nematode Caenorhabditis elegans species at different time intervals by observing the expressions of important stress-responsive genes viz., sod-3, hsp-16.2, ctl-1,2,3 and gst-4. The results exhibited that the combined process of electrochemical oxidation and adsorption treatment is simple, low-cost as well as effective to eliminate ciprofloxacin and its toxic byproducts in aqueous solution.

Synergistic modification of carbon fiber by electrochemical oxidation and sizing treatment and its effect on the mechanical properties of carbon fiber reinforced composites

ABSTRACTIn this article, The CF surface was modified by the synergistic modification of electrochemical oxidation and sizing treatment. Firstly, the electrochemical oxidation was carried out using fatty alcohol polyoxyethylene ether phosphate (AEOPK) as the electrolyte. The content of active groups on the modified CF surface increased by 235%. However, the strength of CF monofilament decreased due to the etching. Then, the electrochemically oxidized CFs were sized with the phosphate modified epoxy resin (PAEK). The etched defects on CF surface caused by the electrochemical oxidation were repaired by sizing agent molecules according to the AFM results. Furthermore, the spreadability of PAEK emulsion on the CF surface, the content of CF surface groups and the interaction of CFRC were characterized by using the monofilament contact angle, XPS and Raman spectroscopy. The results suggested that the synergistic modification could improve the CF surface activity, facilitate the spreading of PAEK on the CF surface, and increase the interaction between the CFs and the resin matrix. There were 20.3 and 22.6% enhancement in the breaking strength and elongation of CF monofilament. In addition, the interlaminar shear strength (ILSS) of CFRC prepared with synergistically modified CFs was increased from 12.81 to 33.04 MPa. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48028.

Treatment of slaughterhouse wastewater with the electrochemical oxidation process: Role of operating parameters on treatment efficiency and energy consumption

In this study, investigation of the applicability and efficiency of electrochemical oxidation (EO) processes for slaughterhouse wastewater was targeted by evaluating the treatment efficiency and energy consumption values together. The effect of operating parameters such as type of supporting electrolyte (SE) (Na2SO4, NaNO3 and NaCl), concentration of SE (0.01-0.1 M), initial wastewater pH (3–9), current density (CD) (4.73–14.20 mA/cm2) and dilution rate of wastewater (1/1-1/4) on removal of chemical oxygen demand (COD), total organic carbon (TOC), total nitrogen (TN), total suspended solids (TSS) and color were investigated. The most effective electrolyte type was observed as NaCl. With the use of 0.025 M NaCl and 25 °C reaction temperature, at fixed 4.73 mA/cm2 CD and pH of 7.03 for 4 h reaction time, the optimum conditions for both energy consumption and removal efficiency for treatment of SWW were obtained. At optimum conditions, TSS, TOC, COD, TN and color removal efficiencies were found as; 99.5%, 88.0%, 92.2%, 93.5% and 99.9%, respectively, and the energy consumption under these conditions were 153.57 kWh/m3 and 14.12 kWh/kg COD. The energy cost was calculated as 1.69 $/kg COD. Also, results distinctly show that almost full mineralization of organics is obtained after 4 h treatment. Unluckily, taking into account the large volumes of effluent produced per slaughtering cycle, the need for long treatment times is impractical, yet if the reactor is developed to include hydrodynamic conditions or combined with another treatment process which is shorter than the EO treatment time a novel setup may be possible.

Low cost and efficient alloy electrocatalysts for CO2 reduction to formate

Oxide-derived (OD) Sn and Sn−Pb−Sb composite electrocatalysts were prepared by electrochemical oxidation treatment at various potentials for electrochemical reduction of CO2 (eCO2R) for formate (HCOO−) production. The morphology, elemental mapping, phase identification, surface characteristics and electrochemical performance of the electrocatalysts were probed systematically. The surface of OD-Sn and OD-Sn-Pb-Sb shows polycrystalline electrodes with porous morphology and XPS results confirm the formation of composite metal/metal oxide surface related to Sn, Pb and Sb. The EDX mapping analysis shows two distant regions of Pb and Sn rich areas in the alloy. The electrochemical results demonstrate that pristine Sn electrodes show higher CO2 Faradaic Efficiency (FE) to formate compared to pristine Sn-Pb-Sb alloy electrode (80% vs. 66%) at −1.4 V vs. RHE. Upon oxidation treatment of pristine Sn at 4 V, the FEHCOO− improves to 84% at the expense of decreased current density. On the contrary, upon oxidation treatment of Sn-Pb-Sb alloy at 5 V, the FEHCOO− improved remarkably from 68% to 91% without any reduction in current density. The improved eCO2R performance of OD-Sn and OD-Sn-Pb-Sb electrodes relative to their pristine electrodes could be attributed to the presence of composite metal/metal oxide structure which leads to local geometric and electronic structural changes.

Removal of the drug procaine from acidic aqueous solutions using a flow reactor with a boron-doped diamond anode

This article reports the electrochemical advanced oxidation treatment of 2.5 L of acidic aqueous solutions with 0.320 mM of the drug procaine hydrochloride in 0.050 M Na2SO4 using a pre-pilot flow plant. This was equipped with a cell, containing a boron-doped diamond (BDD) anode and an air-diffusion cathode for H2O2 generation, which was connected to an annular photoreactor with a 160 W UVA lamp for the study of photoelectro-Fenton (PEF) process. Poor degradation and mineralization was attained by electrochemical oxidation with electrogenerated H2O2 due to the limited attack of both, hydroxyl radical (OH) formed at the BDD surface from water oxidation and H2O2 on organic matter. The electro-Fenton process became more effective thanks to the simultaneous oxidation with OH formed from Fenton’s reaction in the presence of Fe2+. The most powerful process was PEF because of the additional photolysis of photoactive intermediates by UVA radiation. This method allowed achieving 91% mineralization after 360 min of electrolysis at 33.3 mA cm−2. The effect of current density and drug concentration on PEF performance was examined. The mineralization current efficiency and energy consumption were determined for each treatment. Two N-containing derivatives were identified by gas chromatography-mass spectrometry. The quantification of generated carboxylic acids revealed that the final solution in PEF was composed of a mixture of acetic and formic acids.

Influence of Molecular Size on the Electrochemical Oxidation of Fractioned Cork Boiling Wastewater

AbstractThe performance of electrochemical oxidation (EO) using a boron doped diamond (BDD) anode was assessed for cork boiling wastewater (CBW) molecular size fractions of >100 kDa, 50–100 kDa, 20–50 kDa, 10–20 kDa and <10 kDa, obtained through sequential use of ultrafiltration (UF) membranes. The best EO results were found in the experiments performed with no addition of supporting electrolyte and at the lowest applied stirring speed, the more economical and environmentally friendly conditions. The highest EO treatment efficiency was observed for the fraction >100 kDa, which presented also the highest organic load. EO treatment led to an increase in the biodegradability of the fraction >100 kDa and to a decrease in the biodegradability of the fraction <10 kDa. Moreover, samples toxicity was not affected by the EO process, suggesting that the treated samples can be forwarded to biological post‐treatment processes. UF fractionation showed to be advantageous in combination with EO, since it enables the selective use of EO where it is more effective regarding biodegradability and current efficiency.

Electrochemical oxidation treatment of leather dyeing wastewater using response surface methodology

Electrochemical oxidation treatment of leather dyeing wastewater using response surface methodology

A sequential process to treat a cashew-nut effluent: Electrocoagulation plus electrochemical oxidation

The treatment of a real cashew-nut effluent has been studied using a pioneering sequential process involving electrocoagulation (EC) and electrochemical oxidation (EO) approaches. The performance of the system was analyzed in terms of chemical oxygen demand removal, by-products evolution, toxicity and energy consumption. Preliminary EC tests with Fe electrodes were performed at different current densities (8.33–100mAcm−2), yielding COD removals among 17–51%. The residual iron concentration detected was below the Brazilian legal limits of discharge. The sludge obtained from the experiments at 8.33 and 100mAcm−2 revealed a heterogeneous morphology with interconnected laminar plates. Regarding their structure, the powders showed a mixture of poorly crystalline phases. The main elements identified were oxygen, carbon and iron, which allow proposing an alternative use of this powder for construction and building materials. Sequential experiments, using EC at 8.33 or 100mAcm−2 plus EO, intensified COD removals up to 51% and 80%, corresponding to 5 and 65kWhm−3 of energy consumption, respectively. To evaluate the by-products generated during EO treatment, the evolution of carboxylic acids and inorganic species (PO43−, NH4+, NO3−, NO2−) was followed. After that, phytotoxicity analyses were performed in order to assess water quality and its reuse in irrigation activities. Based on these results, the sequential experiment with EC by applying 8.33mAcm−2 plus EO (35.5mAcm−2) was considered the most efficient and viable to depurate the real cashew-nut effluent.

Magnetic Assembled Anode Combining PbO2 and Sb-SnO2 Organically as An Effective and Sustainable Electrocatalyst for Wastewater Treatment with Adjustable Attribution and Construction.

A new electrode consisting of a Ti/PbO2 shell as main electrode (ME) and numerous Fe3O4/Sb-SnO2 granules as auxiliary electrodes (AEs) was developed for flexible electrochemical oxidation (EO) treatment of wastewater. Material and electrochemical characterizations were carried out to study the impacts of the loading amount of the AEs on the attribution and construction of the electrode. Lignin, a complex group of polymeric macromolecules, was selected as the representative actual contaminant to test the real EO capability of the assembled electrodes with different AE loading amounts. The stability and recyclability of the electrodes were also investigated. Results showed that the roughness and the surface area of the electrode were increased with the increased loading amount of AEs, while improvement of the electrode properties was achieved only with the appropriate amounts of AEs. The optimum AE loading (such as 0.25 and 0.5 g on 6 cm2 ME) boosted the EO performance of the anode toward lignin by ∼20%, making the electrode more capable in benzene ring opening. Excessive AEs were found to be unavailing, which only increased the percentage of the less accessible catalytic active sites. Moreover, a preliminary operating mechanism of this 2.5D electrode was proposed to evaluate the effect of AEs and further reveal the relationships of structure and activity of the 2.5D electrode. Finally, the electrode's lifetime was lengthened and further boosted via loading AEs and the subsequent recycling of AEs.

Relevance of adjuvants and additives of pesticide commercial formulation on the removal performance of glyphosate by electrochemically driven processes

Glyphosate is a broad-spectrum systemic herbicide widely used in crops. Contamination of groundwater and superficial water sources by glyphosate may suppose an environmental risk due to its chronic toxicity. In this frame, development of water treatment technologies to remove glyphosate is of high relevance. The objective of this work was to evaluate capabilities of electrochemical oxidation (ECO) as emergent environmental friendly technology. The effect of variation of current density (j), pH and initial concentration of supporting electrolyte was studied when employing DSA® expanded anodes of Ti/Ru0.36Ti0.64O2. Special attention was given to the influence of pH due to the characteristic speciation of glyphosate that may influence ECO performance. Almost complete mineralization (>90%) of pure glyphosate was attained after 3 h of ECO treatment with 0.15 M NaCl at 40 mA cm−2 and pH 3.0. Meanwhile, solely 60% of mineralization was achieved under identical conditions when treating commercial glyphosate pesticide products. Degradation by-products and yielded ionic species were identified by chromatography and chromatography mass spectrometry. A reaction sequence for glyphosate ECO mineralization was proposed.