A comparative study of the efficiency of chemical coagulation and electrocoagulation methods in the treatment of pharmaceutical effluent

Padmaja, K.; Cherukuri, Jyotsna; Reddy, M. Anji

doi:10.1016/j.jwpe.2020.101153

Cited by 75 publications

(24 citation statements)

References 12 publications

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“…Electrochemical treatment processes include advanced oxidation processes (AOPs) such as electrochemical (anodic) oxidation, electrochemical (cathodic) reduction, electrocoagulation (EC), electro-Fenton (EF), and electrodialysis (ED) [44]. These methods can be applied independently or coupled to other technologies such as biological, chemical, and physical as either primary treatment or final treatment process [45]. In addition, electrochemical processes can be carried out in isolation as a batch process or continuously.…”

Section: Electrochemical Methodsmentioning

confidence: 99%

A Review on Electrochemical Degradation and Biopolymer Adsorption Treatments for Toxic Compounds in Pharmaceutical Effluents

et al. 2020

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Pharmaceutical industries generate very large quantities of toxic organic compounds which include volatile organic compounds (VOCs) and/or organic volatile impurities (OVIs). These toxic compounds, amongst which are emerging residual solvents, largely come from wastewater treatment plants (WWTPs) and are being continuously dumped into the environment at an alarming rate. Efficient treatment of pharmaceutical wastewaters (effluents) is currently a major challenge because of not only the enormous quantity to be disposed of but also its complexity, as well as its hazardous nature. Dumping these kinds of polluted wastes into the environment at uncontrolled rates are putting increasing pressure on freshwater ecosystems. This review paper focuses on combined electrochemical degradation and biopolymer adsorption treatment processes and techniques for toxic compounds in pharmaceutical wastewater treatment. These emerging processes such as the combination of electrochemical techniques as a primary treatment method, followed by an adsorption process, is now a topic of intense research as it is proving to very feasible, ecofriendly, and cost-effective in the complete recovery of toxic residual solvents from binary aquatic systems. This paper presents major toxic pollutants in pharmaceutical wastewaters and their fate in the aquatic environment, their sources, and origin in pharmaceutical industries. The evaluation of the traditional methods used for the removal of these emerging organic pollutants from aquatic matrices and pharmaceutical effluents is accomplished. New developments in electrochemical treatments for the remediation of toxic compounds in pharmaceutical wastewaters are also discussed.

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Section: Electrochemical Methodsmentioning

confidence: 99%

A Review on Electrochemical Degradation and Biopolymer Adsorption Treatments for Toxic Compounds in Pharmaceutical Effluents

et al. 2020

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“…Additionally, a study carried out for the treatment of wastewater with the generation of 0.17 g of Al to treat 500 ml of wastewater for 15 min and with 0.04 A is reported (Molano-Mendoza et al, 2018;Padmaja et al, 2020). In addition, Figure 3 shows the kinetic COD, kinetic constants and the correlation coefficients fitted to the second order model k = 0.4828 L/mg min −1 and R 2 = 0.9925…”

Section: Electrolysis Timementioning

confidence: 99%

“…Due to the benefits provided by electrocoagulation, it has been widely used to eliminate various contaminants, such as organic matter, dyes, aromatic compounds, drugs and petroleum derivatives, among others, as well as inorganic matter such as metal ions in wastewater. (Taeyeon Verma, 2017;Kim et al, 2020;Padmaja et al, 2020;Xu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Morales-Figueroa

Teutli-Sequeira

Linares-Hernández

et al. 2022

Front. Environ. Sci.

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Rainwater collected in the Toluca region of Mexico with a pH of 6.25 was treated with an electrochemical process, and the efficiency of two supporting electrolytes were compared, one food grade (sea salt) and the other reagent grade (sodium sulfate). In the first stage, rainwater was characterized to detect the COD content, turbidity, metals such as zinc, iron, aluminum, and lead. Electrocoagulation treatment was performed with an electrochemical cell using aluminum electrodes to study the effect on COD and turbidity, as well as the removal of heavy metals present. The results obtained with response surface methodology and a central composite design reveal that the optimal conditions of the electrocoagulation treatment were a current density of 3.26 mA/cm2 and a time of 11.38 min. Using sodium sulfate, the percentage of turbidity removal is 99.27% and COD 70.83%. The use of sea salt as a support electrolyte in these conditions allowed the removal of COD at 100%, turbidity at 100%, and Al 100%, Mn 84.29%, Zn 97.97%, Pb 46%, Fe 21%. Energy costs that are low lead to proven savings when using this system, indicating that this treatment is an option to both improve rainwater conditions and be able to make use of it safely.

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“…efficient treatment method. Electrocoagulation is usually used to treat textile wastewater [2], dairy wastewater [3] paper industry effluent [4], printing wastewater [5], metal finishing [6] and plating wastewater [7], pharmaceutical wastewater [8], etc.…”

Section: A D V a N C E D O N L I N E A R T I C L Ementioning

confidence: 99%

Electrochemical treatment of dye wastewater using nickel foam electrode

Muthumanickam

Saravanathamizhan

2021

J. Electrochem. Sci. Eng.

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Removal of dye from wastewater has been investigated using the electrocoagulation method. Batch experiment has been conducted to remove the color from synthetically prepared acid red 87dye wastewater. Stainless steel and nickel foam sheets are used as cathode and anode, respectively. The effect of some operating parameters, such as current density, initial dye concentration and supporting electrolyte concentration, on color removal has been studied. It can be observed from the present investigations that the nickel foam electrode effectively removes color from the wastewater. Nickel hydroxyl species formed during the operation and also, nickel (II) hydroxide flocs formed in a subsequent stage, trap colloidal precipitates and make solid-liquid separation easier during the flotation stage. These stages of electrocoagulation must be optimized to design an economically feasible process.

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A comparative study of the efficiency of chemical coagulation and electrocoagulation methods in the treatment of pharmaceutical effluent

Cited by 75 publications

References 12 publications

A Review on Electrochemical Degradation and Biopolymer Adsorption Treatments for Toxic Compounds in Pharmaceutical Effluents

A Review on Electrochemical Degradation and Biopolymer Adsorption Treatments for Toxic Compounds in Pharmaceutical Effluents

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Electrochemical treatment of dye wastewater using nickel foam electrode

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