Indirect Electrochemical Oxidation with Multi Carbon Electrodes for Restaurant Wastewater Treatment

Sastrawidana, I Dewa Ketut; Sukarta, I Nyoman

doi:10.12911/22998993/79414

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…The equations proposed by CCD to predict % COD removal for both G-PbO 2 and graphite electrodes are given in eqs 18 The R 2 values obtained for graphite and G-PbO 2 electrodes were 0.9887 and 0.9867, respectively, and Adj R 2 values were 0.9785 and 0.9747, respectively. The experimental and predicted values of COD removal by the model show around a ± 2.8% deviation for G-PbO 2 and ±1.1% deviation for graphite.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…Recently, advanced oxidation processes (AOPs) were employed to treat highly complex wastewater. Among AOPs, electrochemical oxidation (EO) is widely used because of its inherent advantages such as minimal sludge generation, easy operation, and quick degradation. − Moreover, it is very effective in the treatment of high-refractory compounds and also energy efficient. The most challenging part of the EO is the synthesis of a cost-effective electrode.…”

Section: Introductionmentioning

confidence: 99%

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E-Waste-Derived Electrode for Electrooxidation of Kitchen Wastewater

V S,

Appusamy,

Karuppan

2024

Ind. Eng. Chem. Res.

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The widespread use of electronic and electrical devices leads to significant electronic waste (e-waste) generation. Ewaste predominantly comprises metals, plastics, and printed circuit boards (PCBs). The metallic fraction of PCBs (MF-PCB) holds promise as a potential source of electrode synthesis. Thus, this study focuses on extracting lead from PCBs and electrodepositing it onto the graphite surface in the presence of ultrasound, forming PbO 2 (G-PbO 2 ). Additionally, the performance of G-PbO 2 in batch electrooxidation (EO) of kitchen wastewater (KWW) was evaluated and compared with that of plain graphite. Analysis of the G-PbO 2 outer layer was conducted using powder X-ray diffraction (PXRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDXS), and Xray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results indicated an enhanced electrical conductivity, kinetics, and diffusivity nature of G-PbO 2 , alongside a reduced electrochemical impedance and charge transfer resistance. The effects of current density, electrolyte concentration, and electrode distance were analyzed, employing the central composite design (CCD) to investigate interactions between the variables. The increase in current density improved % COD removal, while higher electrolyte concentration moderately increased COD removal. A minimal interaction between electrode distance and electrolyte concentration was observed, with higher % COD removal at lower electrode distances. Experimental results demonstrated a 98% reduction in COD for G-PbO 2 . First-order kinetic rate constants were 0.00926 min −1 for graphite and 0.0149 min −1 for G-PbO 2 . G-PbO 2 exhibited 50% lower energy consumption compared to graphite with higher current efficiency.

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Section: Electrochemical Characterizationmentioning

confidence: 99%