Treatment of metal plating wastewater by electrocoagulation

Akbal, Feryal; Camcı, Selva

doi:10.1002/ep.10546

Cited by 52 publications

(22 citation statements)

References 41 publications

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“…EC consists of an in‐situ generation of coagulants by an electrical dissolution of Fe or Al electrodes. The generation of metallic cations takes place at the anode, whereas at the cathode, typically a H 2 production occurs together with OH ‐ release . Ferric or aluminum ions generated by electrochemical oxidation of Fe/Al electrode may form monomeric species and polymeric hydroxyl metallic complexes depending on the pH of the aqueous medium, which have strong affinity for dispersed particles as well as counter ions to cause coagulation .…”

Section: Theorymentioning

confidence: 99%

“…The generation of metallic cations takes place at the anode, whereas at the cathode, typically a H 2 production occurs together with OH ‐ release . Ferric or aluminum ions generated by electrochemical oxidation of Fe/Al electrode may form monomeric species and polymeric hydroxyl metallic complexes depending on the pH of the aqueous medium, which have strong affinity for dispersed particles as well as counter ions to cause coagulation . In addition, arsenic is usually strongly adsorbed by iron/aluminum oxides such as amorphous Fe(OH) 3 , Al(OH) 3 , hydrous ferric oxide (HFO), and goethite (FeOOH) .…”

Section: Theorymentioning

confidence: 99%

“…Typically, at the cathode, the solution becomes alkaline with time. The applied current forces

{OH}^{-}

ion migration towards the anode, thus favoring ferric and aluminum hydroxide formation :

{Fe}^{3 +} + 3 {OH}^{-} \to {Fe(OH)}_{3 (s)}

{Al}^{3 +} + 3 {OH}^{-} \to {Al(OH)}_{3 (s)}

…”

Section: Theorymentioning

confidence: 99%

“…EC is a process consisting of generating metallic hydroxide flocs within the water by electrodissolution of sacrificial metal electrodes. Dissolved metals, organic matter, and colloidal contaminants in the water form wide ranges of coagulated species and metal hydroxides in the EC process that destabilize and aggregate the suspended particles or precipitate and adsorb dissolved contaminants . In any electrochemical process, different electrode materials and type of the hybrid electrode pairs are regarded as significant factors for affecting performance of the EC process .…”

Section: Introductionmentioning

confidence: 99%

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Removal of arsenic from drinking water by batch and continuous electrocoagulation processes using hybrid Al‐Fe plate electrodes

Kobya

Akyol

Demirbaş

et al. 2013

Env Prog and Sustain Energy

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Removals of arsenic from drinking water by electrocoagulation (EC) process using six different combinations of hybrid electrodes (Al-Fe), and Al-Al or Fe-Fe electrodes as all anodes and cathodes in a batch mode were evaluated. The removal process with monopolar series mode at optimum operating conditions (2.50 A/m 2 , 150 mg/L, and pH 7.0) indicated that Fe-Al-Al-Fe (anode-cathode-anode-cathode) hybrid plate electrode pairs were the most efficient choice in terms of arsenic removal efficiency (96% in 1 min) and operating cost (0.00202 e/m 3 ). The arsenic removal from drinking water by continuous EC (CEC) process using Fe-AlAl-Fe hybrid plate electrode pairs was also studied with respect to flow rates and initial arsenic concentrations. The effluent arsenic concentration of 10 mg/L in the CEC process was achieved at 3 min for 0.

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Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

“…Typically, at the cathode, the solution becomes alkaline with time. The applied current forces

{OH}^{-}

ion migration towards the anode, thus favoring ferric and aluminum hydroxide formation :

{Fe}^{3 +} + 3 {OH}^{-} \to {Fe(OH)}_{3 (s)}

{Al}^{3 +} + 3 {OH}^{-} \to {Al(OH)}_{3 (s)}

…”

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Removal of arsenic from drinking water by batch and continuous electrocoagulation processes using hybrid Al‐Fe plate electrodes

Kobya

Akyol

Demirbaş

et al. 2013

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Only the organic ligand is destructed, while the heavy metal ions are released in the treated solution. The effluent after electrooxidation contains 6 mg/L Cu 2+ ions and for their removal it needs further treatment, such as ion exchange, chemical precipitation [25], membrane assisted electrodeionization [26], membrane-less electrostatic shielding based electrodialysis/electrodeionization [27], or electrocoagulation [20,28,29].…”

Section: Indirect Electrooxidation In Nacl Electrolyte Solutionmentioning

confidence: 99%

Decolorization Treatment of Copper Phthalocyanine Textile Dye Wastewater by Electrochemical Methods

Dermentzis¹,

Valsamidou²,

Chatzichristou³

et al. 2013

JESTR

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Electrochemical decolorization and degradation treatment of aqueous copper phthalocyanine reactive dye solutions was comparatively studied by electrocoagulation, electrooxidation and electro-Fenton processes. In the electrocoagulation process with aluminum electrodes the colored aqueous solutions of initial pH 6.4 containing 50 mg L-1 copper phthalocyanine and 6 g L-1 NaCl were treated at applied current densities of 2.5 and 5 mA cm-2. Fast and 100% decolorization was achieved in 4 and 2 minutes of electroprocessing respectively. The indirect electrooxidation process was conducted in acidic electrolyte solutions containing 50 mg L-1 copper phthalocyanine and 6 g L-1 NaCl with Ti/Pt and graphite plate electrodes at the applied current density of 10 mA cm-2. Even after 90 minutes of electrolysis time the dye remained by 23 and 18.8 % respectively undegradable. By the direct and indirect electrooxidation with the same amount of Na2SO4 electrolyte and added H2O2 respectively and using the same electrodes, the copper phthalocyanine dye was not or was only barely degraded respectively. In the electro-Fenton process with Fe electrodes and added amounts of H2O2 at pH 3 and an applied current density of 5 mA/cm2 complete degradation of copper phthalocyanine occurred in 15 minutes.

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Current to Clean Water – Electrochemical Solutions for Groundwater, Water, and Wastewater Treatment

Simon

Stöckl

Becker

et al. 2018

Chemie Ingenieur Technik

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Electrochemical technologies for the treatment of industrial and municipal wastewaters, potable water, and groundwater, are presented, focusing on the main water constituents: inorganics, organics, micropollutants, and microorganisms. Removal of inorganic compounds by electrodialysis, electrocoagulation, and capacitive deionization as well as removal of organics and micropollutants by electrosorption, advanced oxidation processes, and anodic oxidation with boron‐doped diamond electrodes are reviewed. Electricity can be generated by degradation of organic compounds in microbial fuel cells and dehalogenation by cathodic reduction minimizes toxic substances in water. The disinfection of different types of water is also presented and it is shown that electrochemical methods offer versatile approaches to contribute to an sustainable future water management.

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Treatment of metal plating wastewater by electrocoagulation

Cited by 52 publications

References 41 publications

Removal of arsenic from drinking water by batch and continuous electrocoagulation processes using hybrid Al‐Fe plate electrodes

Removal of arsenic from drinking water by batch and continuous electrocoagulation processes using hybrid Al‐Fe plate electrodes

Decolorization Treatment of Copper Phthalocyanine Textile Dye Wastewater by Electrochemical Methods

Current to Clean Water – Electrochemical Solutions for Groundwater, Water, and Wastewater Treatment

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