Degradation of pesticide mixture by electro-Fenton in filter-press reactor

Barbosa, Marcus Paulo Rosa; Lima, Nayara Silva; Matos, Danielle Barbosa de; Felisardo, Raul José Alves; Santos, Glaucia Nicolau dos; Salazar‐Banda, Giancarlo R.; Cavalcanti, Eliane Bezerra

doi:10.1016/j.jwpe.2018.08.008

Cited by 30 publications

(5 citation statements)

References 109 publications

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“…e high energy consumption in TC removal was mainly due to the low concentration of TC in RPW, which required many chemicals or energy costs for treatment. While the energy consumption to remove 1 kg of TOC in real wastewater is far below the energy consumption of EF reported from previous studies [38][39][40][41][42]. Flox et al [39] indicated an energy consumption cost of around 2.872 $/kg TOC to eliminate 97% TOC of Mecoprop solution using boron-doped diamond (BDD)/ stainless steel electrodes.…”

Section: Economic Aspectmentioning

confidence: 94%

Removal of Tricyclazole and Total Organic Carbon in Real Pesticide Wastewater by Electro-Fenton

Bùi

Huynh

2022

Journal of Chemistry

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In this study, electro-Fenton (EF) was employed for the removal of tricyclazole (TC) and total organic carbon (TOC) in real pesticide wastewater (RPW). The central composite design (CCD) with three parameters, that is, current density, Fe2+ concentration, and electrolysis time, has been conducted to predict the TOC and TC removal efficiency. The high correlation of the quadratic models of 0.9842 and 0.9781 for TC and TOC removal, respectively, indicates the significance of the models. The obtained results revealed that the high-efficiency removal of both TC and TOC in RPW. Approximately 99.6% of TC was decomposed under the optimum conditions of a current density of 2.2 mA/cm2 and an Fe2+ concentration of 0.2 mM during 188 min with an operating cost of 121.392 $/kg TC or ∼2.692 $/m3, while 84.2% TOC was eliminated at a current density of 2.2 mA/cm2 and an Fe2+ concentration of 0.2 mM during 217 min with an operating cost of 3.019 $/kg TOC or 3.916 $/m3. Acute toxicity tests at optimal condition revealed moderate exhibition toxicity of treated wastewater against Daphnia magna with LC50 values of 3.12%, 2.05%, 1.84%, and 1.36% at 24 h, 48 h, 72 h, and 96 h, respectively. The removal of TC and TOC followed pseudo-first-order kinetic with an R2 of ∼0.993 and 0.923, respectively.

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Section: Economic Aspectmentioning

confidence: 94%

Removal of Tricyclazole and Total Organic Carbon in Real Pesticide Wastewater by Electro-Fenton

Bùi

Huynh

2022

Journal of Chemistry

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“…The mean detention time (tmean or ̅ ), dimensionless time (θ), normalized pulse tracer concentration ( ), exit age distribution function (E(θ)), and dimensionless variance of the tracer test with respect to dimensionless time ( ) were calculated according to the procedure described in Section 6-6 of [27] and are listed here as Eq. ( 7) through (11), respectively. Replicates of experiments indicate an error of 3% on the estimation of mean detention time with a standard deviation of ± 0.1 min.…”

Section: Electrochemical Cellmentioning

confidence: 99%

“…have shown great H2O2 production that allows an efficient  OH generation leading to a quick degradation and mineralization of POPs by EF and related processes [9][10][11][12][13]. This is feasible because a 3D ADE ensures a remarkably high efficiency for O2 reduction by reaction (1) since it is not limited by the mass transfer of the gas such as occurs with immersed cathodes that are feed with the dissolved O2 in solution.…”

Section: Introductionmentioning

confidence: 99%

Mass transfer and residence time distribution in an electrochemical cell with an air-diffusion electrode: Effect of air pressure and mesh promoters

Walker

Cavalcanti

Atrashkevich

et al. 2021

Electrochimica Acta

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Electrochemical advanced oxidation processes (EAOPs) have shown excellent capabilities to the abatement of recalcitrant organic pollutants. The Fenton-based electrochemical systems have shown great performance for in-situ generation of H2O2, allowing an efficient • OH production for the mineralization of organic pollutants. These systems have been widely applied at bench scale; however, studies to scale-up to a higher technology readiness level (TRL) are lacking. One of the main scale-up challenges of the Fenton-based systems is the implementation of air diffusion electrodes (ADE) in flow-by electrochemical cells. The ADE adds additional complexity with respect to mass transfer effects due to hydraulic reactor design and ADE gas pressure control. Therefore, this work experimentally investigated residence time distribution and platinum-sheet electrode mass transfer effects due to (a) the liquid cross-flow velocity through the electrochemical cell, (b) the gas pressure of the air-diffusion electrode (ADE), and (c) the presence of mesh sheet mass transfer promoters between the electrodes. Analysis of experimental results revealed a synergistic improvement of mass transfer with the ADE gas flow and the presence of mesh promoters. Engineers could exploit this synergistic effect to design electrochemical cells with significantly lower capital cost.

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“…It is one of the most promising and attractive electrochemical techniques due to its simplicity, efficiency, and relatively low operating cost. [22,25] Numerous studies have shown that this process has been effective in the degradation of toxic and refractory compounds such as dyes, [26][27][28][29] pesticides, [30][31][32] and pharmaceutical compounds. [33][34][35][36][37][38] In this process, hydroxyl radicals are generated in-situ via Fenton reagents (H 2 O 2 and Fe 2+ ).…”

Section: Introductionmentioning

confidence: 99%

Degradation study of some pharmaceuticals in commercial formulation by electro‐Fenton process using a dimensionally stable anode cathode: Analytical technique, optimization conditions, and energy consumption

Appia

Ouattra

2023

Can J Chem Eng

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The aim of this work was to degrade pharmaceuticals such as amoxicillin (AMX), ceftriaxone (CTX), and Telebrix (TLX) by electro‐Fenton (EF) process using a dimensionally stable anode (DSA) cathode, Pt‐RuO2‐IrO2 (PRI). For this purpose, the optimal conditions of degradation, the pseudo‐first‐order kinetics, the current efficiency, the electrochemical energy consumption (EEC), and the energy cost have been investigated. A spectrophotometric analysis technique has been developed. It is a simple, fast, linear, reliable, and selective technique with LOD = 0.013 g/L and LOQ = 0.04 g/L. The optimum working conditions determined are: Fe2+ = 0.2 mM, pH = 3, j = 20 mA/cm2, and (Pt, PRI) as electrode pair. Under these conditions, the EF process leads to a conversion of the parent compound. In addition, the degradation of compounds by EF follows pseudo‐first‐order kinetics. The EEC for the degradation of 1 kg COD of an organic compound is 99.48, 66.86, and 50.32 kWh kg COD−1 for AMX, CTX, and TLX respectively. The energy cost for processing these compounds is $4.92 (AMX), $10.03 (CTX), and $7.55 (TLX) with current efficiencies between 26% and 51%. Ultimately, the EF process using PRI at the cathode can be used for the treatment of real wastewater from health centres under optimal conditions.

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Degradation of pesticide mixture by electro-Fenton in filter-press reactor

Cited by 30 publications

References 109 publications

Removal of Tricyclazole and Total Organic Carbon in Real Pesticide Wastewater by Electro-Fenton

Removal of Tricyclazole and Total Organic Carbon in Real Pesticide Wastewater by Electro-Fenton

Mass transfer and residence time distribution in an electrochemical cell with an air-diffusion electrode: Effect of air pressure and mesh promoters

Degradation study of some pharmaceuticals in commercial formulation by electro‐Fenton process using a dimensionally stable anode cathode: Analytical technique, optimization conditions, and energy consumption

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