Application of nickel foam as an effective electrode for the electrochemical treatment of liquid hazardous wastes of COD analysis containing mercury, silver, and chromium (VI)

Ali, Banafsheh Haji; Baghdadi, Majid; Torabian, Ali

doi:10.1016/j.eti.2021.101617

Cited by 7 publications

(3 citation statements)

References 28 publications

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“…On the other hand, the Fenton reagent generation process greatly benefits from an increase in the electrode surface area. The formation of hydroxyl radicals can be increased by enhancing the cathode's conductivity and specific surface, which eventually improves the removal of contaminants [Haji Ali et al, 2021]. In addition to its superior advantage due to its porous structure and high conductivity, nickel foam was a practical substitute for the creation of H 2 O 2 , where its accumulation at the nickel foam cathode was five times larger than that of the graphite electrode.…”

Section: Introductionmentioning

confidence: 99%

Modification of Electro-Fenton Process with Granular Activated Carbon for Phenol Degradation – Optimization by Response Surface Methodology

Thwaini,

Salman

2023

J. Ecol. Eng.

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As a result of rapid industrialization and population development, toxic chemicals have been introduced into water systems in recent decades. Because of its excellent efficiency and simple design, the three-dimensional (3D) electro-Fenton method has been used for the treatment of wastewater. The goal of the current study is to explore the efficiency of phenol removal by the 3D electro-Fenton process, which is one of the advanced oxidation processes (AOPs). In the present work, the effect of the addition of granular activated carbon (GAC) particles to the electro-Fenton system as the third electrode would be investigated in the presence of graphite as the anode and nickel foam as the cathode, which is the source of electro-generated hydrogen peroxide (H 2 O 2 ). The influence of operation parameters (current density, electrolysis time, and GAC) on catalytic performance will be studied, which will be adjusted by the response surface methodology (RSM). The pH was adjusted to 3, and the airflow was set to 10 L/h. According to the results the nickel foam was an excellent cathode material choice. The best conditions for phenol elimination were at current density of 3.56 mA/cm 2 , FeSO 4 .7H 2 O dosage of 0.1 mM, GAC of 30 g, and a time of 3 h to attain the removal rates of phenol and chemical oxygen demand (COD) of 98.79% and 93.01%, respectively. The results showed that time had a higher effect on the phenol and COD removal efficiency, while the impact of current density was lower. The model equation's high R 2 value (97.90%) demonstrates its suitability.

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Section: Introductionmentioning

confidence: 99%

Modification of Electro-Fenton Process with Granular Activated Carbon for Phenol Degradation – Optimization by Response Surface Methodology

Thwaini,

Salman

2023

J. Ecol. Eng.

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“…The authors pointed out that the applied technology is expensive but effective in solving problems with the mentioned hazardous waste. Haji Ali et al [6] showed that application of nickel foam as an electrode may be used for the electrochemical treatment of liquid hazardous wastes generated during COD (Chemical Oxygen Demand) tests, which contain mercury, silver, and chromium (VI). However, the authors pointed out that the disadvantage of the application of the proposed method is the large-scale production of nickel foam.…”

Section: Introductionmentioning

confidence: 99%

Application of the Hazardous Waste Vitreous Enamel Generated in the Production Process of Heating Devices as a Partial Replacement for Cement

et al. 2022

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Solving problems with hazardous waste materials is of crucial importance today. In the presented study, the application of waste vitreous enamel as a cement replacement up to 30% in mortar and concrete production was investigated. The chemical and physical-chemical characterization of the starting material was performed, as well as a leaching test and physical-mechanical characterization of mortar and concrete mixes. Obtained results showed that, due to its chemical composition, the vitreous enamel used must be classified as hazardous waste. At the same time, it possesses pozzolanic properties and satisfies minimal criteria for use as a cement replacement. Testing mortars and concrete mixes indicate that waste vitreous enamel can be applied as a construction material for cement replacement in the maximal amount of 20%. The leaching test was performed in accordance with international standard EN 12457-2 on hardened mortar with a maximal cement replacement of 20%. The results showed that there was no significant release of toxic elements, i.e., that the practical application of hazardous waste vitreous enamel in the construction industry may be fully in line with environmental standards.

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“…Electrodos eficientes diseñados para electro-amalgamación de mercurio en solución acuosa se han diseñado con base en metales como el platino o a partir de hoja de grafito (ánodo) y espuma de níquel (cátodo) (Haji Ali et al, 2021;Tunsu & Wickman, 2018). La eficiencia en el uso de la técnica de electrocoagulación usando ánodo escarificado de hierro ha sido estudiada, complementario a parámetros fisicoquímicos como el pH, la temperatura o la agitación, en esta técnica es importante analizar el papel del electrolito de la solución, la distancia entre electrodos, el voltaje aplicado al proceso y el tiempo de operación (Chaturvedi, 2013).…”

Section: Tratamiento Electroquímicounclassified

Estigmas del maíz como sustrato para remoción de mercurio en aguas contaminadas

Acuña Sastoque

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2.3.4 Tendencia den producción científica 2.3.5 Red de Autores 2.3.6 Documentos más citados 2.4 Materiales y Métodos vigilancia Tecnológica 2.4.1 Definición de la ecuación de búsqueda 2.5 Resultados vigilancia Técnológica 2.5.1 Registro de patentes 2.6 Implicaciones de la vigilancia científico -tecnológica en ruta metodológica 2.7 Conclusiones 3. El problema de contaminación por mercurio 3.1 Introducción 3.2 Características Generales 3.3 Mercurio en el ambiente 3.3.1 Mercurio en aire 3.3.2 Mercurio iónico en medio acuoso 3.4 Mercurio antropogénico

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Application of nickel foam as an effective electrode for the electrochemical treatment of liquid hazardous wastes of COD analysis containing mercury, silver, and chromium (VI)

Cited by 7 publications

References 28 publications

Modification of Electro-Fenton Process with Granular Activated Carbon for Phenol Degradation – Optimization by Response Surface Methodology

Modification of Electro-Fenton Process with Granular Activated Carbon for Phenol Degradation – Optimization by Response Surface Methodology

Application of the Hazardous Waste Vitreous Enamel Generated in the Production Process of Heating Devices as a Partial Replacement for Cement

Estigmas del maíz como sustrato para remoción de mercurio en aguas contaminadas

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