Electrocoagulation of chromium in tannery wastewater by a composite anode modified with titanium: parametric and kinetic study

Gui-ju, LI; Can, Yang; Yue, Yao; Zhang, Ming

doi:10.5004/dwt.2019.24792

Cited by 12 publications

(4 citation statements)

References 28 publications

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“…The reaction rates during electrocoagulation process were found to be higher at neutral or alkaline pH. 8 At the low initial pH of 2.5, the removal efficiency of metals might be affected, and hence lower removal percentage efficiencies was observed. This effect was clearly observed when the experiments were conducted with increase in initial pH.…”

Section: Electrodes Without Perforationsmentioning

confidence: 90%

Interaction Effect of Operating Parameters during Oxidation of Different Dyes via the Fenton Process. Application of the Plackett-Burmann Design

Djeghader¹,

Bendebane²,

Ismail³

2023

ChChT

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The interaction effect of eight operating factors on the degradation of three organic dyes of different structures (Cibacron green, methylene blue and methyl orange) has been studied. Effect had been evaluated statistically using the Plackett-Burman screening design which ex-tracted valuable information on the most important parameters and their interactions. The goodness of the model fit was checked by the determination of the coefficient R2. The process factors, which affected the degradation efficiency of dyes, were then analyzed and illustrated; the most important valueі (p and F) for three dyes proved the validity of the model. The results of interactions between the factors allow to understand and study the impact of each parameter on the elimination of dyes and to distinguish the key factor to upgrade the efficiency of the Fenton process.

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Section: Electrodes Without Perforationsmentioning

confidence: 90%

Interaction Effect of Operating Parameters during Oxidation of Different Dyes via the Fenton Process. Application of the Plackett-Burmann Design

Djeghader¹,

Bendebane²,

Ismail³

2023

ChChT

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“…In the experiments on the effect of parameters and kinetics of the EC process with titanium metal (Ti) electrode for removing Cr from tannery effluents. 107 The authors evaluated the use of different electrodes and different configurations on the treatment efficiency, with different combinations with carbon graphite (C), Al, Fe, and titanium metal (Ti) electrodes, with cathode and anode configurations in the following order: Al−C, Fe−C, (Al + Ti)−C and (Fe + Ti)−C. The studies were conducted in synthetic solutions containing (Cr: 50.0 mg•L −1 ) and in real effluents containing (Cr: 10.0 mg•L −1 , COD: 1000 mgo 2 •L −1 ).…”

Section: Applications Of the Ec Processmentioning

confidence: 99%

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Guerreiro Crizel,

Barreto,

Fiori

et al. 2024

ACS EST Water

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Electrocoagulation (EC) is an efficient treatment method that involves the electrodissolution of anodes, the formation of coagulants in situ, and the production of hydrogen at the cathode, facilitating the removal of pollutants by flotation. Industry in general aims to reduce the contaminant load, expressed as chemical oxygen demand (COD), and EC effluent treatment is particularly effective in this process. The development of EC processes has been an efficient alternative for the treatment of effluents with high pollutant loads, such as tannery, pulp and paper, textile, beverage, and food industries, and many demonstrate the potential for application in car wash effluent. This study presents a review of the use of EC for the treatment of various effluents containing COD, OGs, surfactants, color, and turbidity, but with a greater focus on the vehicle washing sector. It also discusses the factors that influence the efficiency of EC and the main discussions of the authors. Presently, the investigations of studies already carried out show that the performance of the EC process is dependent on many relationships and factors, such as the type of material constituting the electrode, the electric potential difference, the electric current density, the distance between electrodes, the surface area of the electrodes, the pH, the initial concentration of contaminants, the conductivity and the treatment time. The review demonstrated that the EC process has been employed in the treatment of many types of effluents and with relatively high efficiency rates, in general, between 60.0% and up to 90.0%, aiming at the reduction of the COD indexes, the reduction from 60.0% up to 99.0% of color content, the 87.0% reduction of chromium. In turn, for turbidity, it varied on average from 44.0 to 99.0%. For other parameters such as MBAS and OGs, in most studies, the reduction exceeded 90.0%.

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“…Electrical energy consumption is a very important economical parameter in the electrocoagulation process. The electrical energy consumption was calculated using the following Equation ( 6) [23].…”

Section: The Main Calculations Of Electrocoagulation Processmentioning

confidence: 99%

Effects of the Operational Parameters in a Coupled Process of Electrocoagulation and Advanced Oxidation in the Removal of Turbidity in Wastewater from a Curtember

et al. 2022

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The tannery industry during its process generates various polluting substances such as organic matter from the skin and chemical inputs, producing wastewater with a high concentration of turbidity. The objective of this research is to evaluate the most appropriate operational parameters of the coupled process of electrocoagulation and advanced oxidation to achieve the removal of turbidity in wastewater from a tannery in the riparian zone (tannery). This process uses a direct current source between perforated aluminum electrodes of circular geometry submerged in the effluent, which causes the dissolution of the aluminum plates. For our study, an electrocoagulation unit coupled to an ozone generator has been built at the laboratory level, where the influence of five factors (voltage, inlet flow to the reactor, initial turbidity, pH, and ozone flow) has been studied with three levels with regarding turbidity, using the Taguchi experimental methodology. The optimal conditions for the removal of turbidity were obtained at 10 volts, 7.5 pH, 360 L/h of wastewater recirculation flow rate; 2400 mg/h of ozone flow rate; and 1130 NTU of initial turbidity of the sample in 60 min of treatment reaching a removal of 99.75% of the turbidity. Under optimal conditions, the removal of chemical oxygen demand (COD) and biochemical oxygen demand (BOD) was determined, reaching a removal percentage of 33.2% of COD and 39.36% of BOD was achieved. Likewise, the degree of biodegradability of the organic load obtained increased from 0.467 to 0.553.

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Electrocoagulation of chromium in tannery wastewater by a composite anode modified with titanium: parametric and kinetic study

Cited by 12 publications

References 28 publications

Interaction Effect of Operating Parameters during Oxidation of Different Dyes via the Fenton Process. Application of the Plackett-Burmann Design

Interaction Effect of Operating Parameters during Oxidation of Different Dyes via the Fenton Process. Application of the Plackett-Burmann Design

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Effects of the Operational Parameters in a Coupled Process of Electrocoagulation and Advanced Oxidation in the Removal of Turbidity in Wastewater from a Curtember

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