Electrochemical degradation and mineralisation of organic dyes in aqueous nitrate solutions

Sarfo, Daniel K.; Kaur, Amandeep; Marshall, David L.; O’Mullane, Anthony P.

doi:10.1016/j.chemosphere.2023.137821

Cited by 22 publications

(7 citation statements)

References 66 publications

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“…They found that glucose compared to acetate was the best co-substrate for ABRX3 decolorization. Recently, complete decolorization of the azo dye methyl orange using an electrochemical approach was recently reported in the study by Sarfo et al [20], as well as an 83% reduction rate of total organic carbon using a simple Cu sheet as a working electrode.…”

Section: Introductionmentioning

confidence: 98%

Saline Sediments as a Suitable Source for Halophilic Inoculums to Degrade Azo Dyes in Synthetic and Real Textile Wastewaters by Microbial Electrochemical Systems

et al. 2023

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The treatment of textile wastewater (TWW) loaded with recalcitrant azo dyes in bioelectrochemical systems (BES) rather than in physicochemical processes is a low-cost and environmentally friendly process. The main objective of this study is to investigate the potential of different saline sediments collected from extreme Tunisian environments for the formation of bioanodes capable ofsimultaneous azo dyes degradation and electric current generation in synthetic (STWW) and real textile wastewaters (RTWW) characterized by a varied composition of azo dyes and a high salinity. The obtained bioanodes and anolytes were studied comparatively by electrochemical, microscopic, analytical, and molecular tools.Based on the UV–visible spectra analysis, the breakdown of the azo bond was confirmed. With RTWW, the BES achieved a chemical oxygen demand (COD) abatement rate of 85%with a current density of 2.5 A/m2. Microbial community analysis indicated that a diverse community of bacteria was active for effluent treatment coupled with energy production. At the phylum level, the electrodes were primarily colonized by proteobacteria and firmicutes, which are the two phyla most involved in bioremediation. The analysis of the microbial community also showed the abundance of Marinobacter hydrocarbonoclasticus and Marinobacter sp. species characterized by their high metabolic capacity, tolerance to extremophilic conditions, and role in hydrocarbon degradation.

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Section: Introductionmentioning

confidence: 98%

Saline Sediments as a Suitable Source for Halophilic Inoculums to Degrade Azo Dyes in Synthetic and Real Textile Wastewaters by Microbial Electrochemical Systems

et al. 2023

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“…TW, representative of urban water sources, introduces a spectrum of dissolved ions and organic compounds, potentially influencing the photocatalytic activity of ZnO. On the other hand, SW, with its rich mineral content and saline composition, presents a unique challenge and opportunity for the photocatalytic degradation of MB dye. − …”

Section: Introductionmentioning

confidence: 99%

Assessment of the Raceway Pond Reactor for Degradation of Methylene Blue Dye in Different Types of Water: A Systematic Kinetics Study under Natural Solar Light

Jadoun

2024

ACS EST Water

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The Atacama Desert (AD), known for its extreme aridity and abundant solar irradiance, presents an opportunity for innovative solar-based environmental research. Raceway pond reactors (RPRs), characterized by their shallow, circular design, offer a scalable solution for pollutant degradation in aqueous environments, known for their versatility and eco-friendliness. This study explores the effectiveness of RPRs under the intense solar radiation of the AD in degrading Methylene blue (MB) dye across different water types: deionized water (DW), tap water (TW), and seawater (SW) with natural pH levels of 5.7, 7.1, and 8.5, respectively. Zinc oxide (ZnO) synthesized via the sol−gel method was used as the photocatalyst with average crystallite size 42.38 and 80.14 nm determined by the Scherrer and the Williamson−Hall equations, respectively. Results demonstrate the successful removal of 100%, 98.54%, and 84.64% of 20 mg/L of MB dye using 0.4 g/L ZnO photocatalysts in 10 L of DW, TW, and SW, respectively. Kinetic analysis favors a pseudo-first-order model, and the degradation order follows DW > TW > SW based on pseudo-first-order constants (0.03902, 0.03217, and 0.00969 min −1 ), highlighting the potential of solar energy and RPRs for environmental remediation in sun-rich regions.

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“…Up till now, several methods have been conducted to purify wastewater, including flocculation, photocatalysis, membrane separation, ion exchange, and electrochemical processes. [12][13][14][15][16] Unfortunately, the bulk of these techniques are limited by poor adsorption capacity, difficult regeneration, secondary pollution, high energy consumption, and high operation cost. 17,18 Moreover, it's hard to reduce the Cr(VI) concentration to the USEPA or WHO standard with the above technologies.…”

Section: Introductionmentioning

confidence: 99%

Sodium alginate/polyethyleneimine/polydopamine@cellulose nanofiber composite aerogel as a novel adsorbent for Cr(VI) and dyes removal

Li,

Lei,

Liu

et al. 2023

Polymer Engineering & Sci

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In this work, a novel SA/PEI/PDA@CNF (SPCP) aerogel adsorbent was prepared for efficient hexavalent chromium (Cr(VI)) and dyes removal. Sodium alginate was used as the skeleton ingredient, nanocellulose fiber as the reinforcing agent, while polyethyleneimine provides functional groups, and polydopamine was added to improve the adsorption capacity of the aerogel toward cationic dyes. Several methods were used to characterize the SPCP aerogel, and thorough research showed that the aerogel's adsorption capacities for CR, Cr(VI), and MB were 1078.06, 2827.38, and 596.96 mg/g, respectively. In addition, it was established that the pseudo‐second‐order kinetics provides the most accurate way to the adsorption kinetic process while the Langmuir model provides the most accurate representation of the adsorption isotherm. Additionally, SPCP aerogel still retained exceptional adsorption capability after five adsorption‐desorption cycles. Thereupon, SPCP, this biomass composite aerogel exhibits notable benefits, such as high adsorption capacity, marvelous sustainability, cost‐effectiveness, and easy operation, which was considered to be a promising adsorbent for the wastewater treatment.

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Electrochemical degradation and mineralisation of organic dyes in aqueous nitrate solutions

Cited by 22 publications

References 66 publications

Saline Sediments as a Suitable Source for Halophilic Inoculums to Degrade Azo Dyes in Synthetic and Real Textile Wastewaters by Microbial Electrochemical Systems

Saline Sediments as a Suitable Source for Halophilic Inoculums to Degrade Azo Dyes in Synthetic and Real Textile Wastewaters by Microbial Electrochemical Systems

Assessment of the Raceway Pond Reactor for Degradation of Methylene Blue Dye in Different Types of Water: A Systematic Kinetics Study under Natural Solar Light

Sodium alginate/polyethyleneimine/polydopamine@cellulose nanofiber composite aerogel as a novel adsorbent for Cr(VI) and dyes removal

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