Comparison between coagulation and electrocoagulation processes for the removal of reactive black dye RB-5 and COD reduction

Tlaiaa, Younis Swadi; Naser, Zainab A.; Ali, Ahmed Hassoon

doi:10.5004/dwt.2020.25914

Cited by 14 publications

(2 citation statements)

References 16 publications

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“…As a result, more amount of chlorine/ hypochlorite will be generated. Hence the rate of removal was increased [62] [63]. Another research shows that during the initial periods of electrolysis, the voltage increases sharply until a maximum value.…”

Section: Sodium Chloridementioning

confidence: 95%

Factors Affecting Electrocoagulation Process for Different Water Types: A review

Abed AL-Rubaye,

A. AlHaboubi,

Al-Allaq

2024

alkej

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Raw water must meet specific physical, chemical, and biological requirements to be suitable for drinking. There are various techniques available for treating wastewater, and aside from conventional methods that involve chemicals, electrocoagulation is an efficient and advanced approach. Electrocoagulation has proven effective in treating many pollutants, including bacteria, viruses, iron, fluoride, sulfate, boron, hardness, and turbidity. Total suspended solids, organic and inorganic materials, chemical oxygen demand COD, biochemical oxygen demand BOD, and color. It finds extensive application in treating different types of water and wastewater due to its exceptional ability to remove diverse contaminants. Recently, electrocoagulation has garnered significant attention due to its remarkable efficiency in treating various pollutants. This article provides a thorough analysis of contemporary literature that is committed to using electrocoagulation in a variety of water treatment methods, with a focus on the different variables affecting the process performance, such as electrical current, electrode type, electrode configuration, initial pH, electrode distance, NaCl concentration, initial concentration of pollutants, operating temperature and electrolysis time.

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Section: Sodium Chloridementioning

confidence: 95%

Factors Affecting Electrocoagulation Process for Different Water Types: A review

Abed AL-Rubaye,

A. AlHaboubi,

Al-Allaq

2024

alkej

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“…In a lab scale study, the comparison of biological, chemical, and EC treatment on municipal wastewater showed that the biological required more time than CC and EC processes to achieve similar removal efficiencies for COD and TSS, though there was less sludge produced than in the other processes. 89 However, in another comparative study of CC and EC for mitigating reactive black dye and COD, the optimum volume of sludge was produced when FeCl 3 was used as a coagulant in the case of CC, while EC sludge was lower by 40%. 90 Finally, research on the sludge produced during the biological treatment and EC process of soya oil refinery processing wastewater revealed a 28% reduction in favor of the electrochemical process, while the final chemical synthesis would allow usage as a fertilizer.…”

Section: Ec Sludge Treatmentmentioning

confidence: 96%

Electrocoagulation as a revived wastewater treatment method‐practical approaches: a review

Magnisali

Yan

Vayenas

2021

J of Chemical Tech & Biotech

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This review paper aims to demonstrate electrocoagulation (EC) as a revived technology and introduce recent steps of advanced configurations, along with hybrid approaches for the efficient electrochemical treatment of multi-sourced wastewaters. A brief theoretical background is also provided. Moreover, the practical applications of the process are presented, while no previous research has ever attempted to do so. Through online-based data research, it was found that there are 75 manufacturers of EC systems internationally. Industrial case studies reveal actual process conditions and economical data. America holds 33% of global EC systems' manufacturing share and it is considered the leader in EC innovative designs with a percentage of almost 59%. In America and Europe, composite schemes are nearly equivalent to EC autonomous systems, with respective percentages of 41% and 47%. The performance of a two-stage process combining electro-coagulation (EC) and electro-oxidation (EO) has been proven to be the most successful combination in industrial wastewater treatment, representing 54% of hybrid systems available globally. Most of the commercialized EC systems are of small-medium sizes, accounting for 88% of all systems available worldwide. The latest trends on new reactor and electrode configurations are also presented. EC has great potential for further improvement as there is strong academic background to support water treatment companies for industrial scale ups. Cylindrical type reactors tend to dominate due to the ease of their use and maintenance; meanwhile, hybrid systems of EC with EO, membranes and/or adsorption will continue to expand on the market due to the mature level of these technologies and their ease of adaptation.

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Optimization of anionic dye removal using cross-linked chitosan composite as eco-friendly bio-adsorbent

Elhady,

Bassyouni,

Elshikhiby

et al. 2024

Appl Water Sci

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The environmental impact of wastewater discharged from the textile dyeing industry has a significant challenge and influence on aquatic ecosystems and human health if not properly managed. This study aimed to develop a novel cross-linked chitosan composite, denoted as chitosan/fly ash/polyvinyl alcohol (Ch/FA/PVA), as a bio-adsorbent for removing Congo Red (CR) textile dye from industrial wastewater. The synthesis involved the incorporation of FA into the chitosan matrix at various ratios to optimize the process. A specifically tailored composite, Ch/FA0.75/PVA, exhibited superior performance with a remarkable 99.7% CR removal under optimum conditions: adsorbent dose (0.9 g/l), contact time (50 min), and dye concentration (40 mg/l). The characterization of Ch/FA0.75/PVA through SEM–EDX, BET, FTIR, and pHzpc confirmed its suitability for adsorption. Employing Box–Behnken design and analysis of variance (ANOVA) facilitated the optimization of key adsorption variables. The Freundlich model described the adsorption equilibrium, indicating a maximum adsorption capacity of 263.15 mg/g for CR dye. The pseudo-second-order model demonstrated favorable kinetics. The study was scaled up to the practical application of Ch/FA0.75/PVA in a pilot plant for industrial wastewater treatment, revealing substantial removal percentages for dye, color, COD, BOD5 and TDS. This comprehensive approach highlights the promising efficacy of Ch/FA0.75/PVA in addressing environmental concerns associated with textile dye wastewater.

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Comparison between coagulation and electrocoagulation processes for the removal of reactive black dye RB-5 and COD reduction

Cited by 14 publications

References 16 publications

Factors Affecting Electrocoagulation Process for Different Water Types: A review

Factors Affecting Electrocoagulation Process for Different Water Types: A review

Electrocoagulation as a revived wastewater treatment method‐practical approaches: a review

Optimization of anionic dye removal using cross-linked chitosan composite as eco-friendly bio-adsorbent

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