Electrochemical treatment of shrimp farming effluent: role of electrocatalytic material

Menezes, Francisco Leonardo Gomes de; Silva, André Jailson Cabral da; Martínez‐Huitle, Carlos A.; Zanta, Carmem Lúcia de Paiva e Silva; Alves, Janete Jane Fernandes; Castro, Sonia

doi:10.1007/s11356-016-7408-4

Cited by 14 publications

(2 citation statements)

References 28 publications

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“…12 also shows that the only parameter that meets the Brazilian legislation (CONAMA, 2011) is turbidity. Thus, even though the reactor has a good efficiency in removing O&G and turbidity, the effluent needs to undergo a post-treatment before being released into the environment, because the high COD values (589.3 mgL -1 ) and TS (825 mgL -1 ) may favor eutrophication of the water environment (Menezes et al, 2017). A suggestion would be the insertion of the same system in series, or a biological system to reduce COD, or even decantation and/or postreactor PE filtration units to reduce the TS concentration.…”

Section: Global Analysis Of the Physical-chemical Parameters Of The Effluentmentioning

confidence: 99%

“…However, this wastewater contains low concentrations of nitrogen and phosphorus, making an eventual biological treatment, in itself, ineffective (Asia, 2003;Oliveira et al, 2018;Menezes et al, 2017). Other treatment alternatives using only metal salts such as polymers and polyelectrolytes have been used, however, they are expensive, generate excess coagulant materials, and can even lead to secondary pollution (Jun Lu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Fernandes¹,

Alexandre²,

Saturno³

et al. 2021

IJAEMS

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This work had as objective the development and analysis of a continuum flow reactor and measure its efficiency in the treatment of residual water of the biodiesel purification process using electro flocculation. The reactor was designed with two interconnected chambers with an 0.2 cm opening between then and reaction volume was 0.883 L and an electrolytic area of 351 cm². The electrodes were all aluminum, which were arranged in parallel and with 0.5 cm spacing, whose power was supplied by a DC source. As design variables, the influence of electrical potential (U) and residence time (τ) on: current density, final pH, removal of oils and greases, COD (Chemical Oxygen Demand), turbidity and total solids, in addition to quantification of the sludge mass obtained and the energy cost of the reactor. The best performance was for a potential of 6.0 volts and a τ of 29.43 min, with 90% removal of oils and greases, 53% COD and 4.38 g of sludge, culminating in an energy consumption ranging from 0.708 kWhm -3 to 4.73 kWhm -3 . In addition, by visual analysis of the formation of bubbles and the removal of turbidity (94%), it was concluded that the division of the reactor in two chambers reduced the secondary contamination of the treated effluent.

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Section: Global Analysis Of the Physical-chemical Parameters Of The Effluentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Fernandes¹,

Alexandre²,

Saturno³

et al. 2021

IJAEMS

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Electrochemical treatment of penicillin, cephalosporin, and fluoroquinolone antibiotics via active chlorine: evaluation of antimicrobial activity, toxicity, matrix, and their correlation with the degradation pathways

Serna-Galvis

Berrio-Perlaza

Torres-Palma

2017

Environ Sci Pollut Res

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Antibiotics are pharmaceuticals widely consumed and frequently detected in environmental water, where they can induce toxic effects and development of resistant bacteria. Their structural variety makes the problem of antibiotics in natural water more complex. In this work, six highly used antibiotics (at 40 μmol L) belonging to three different classes (penicillins, cephalosporins, and fluoroquinolones) were treated using an electrochemical system with a Ti/IrO anode and a Zr cathode in the presence of NaCl (0.05 μmol L). The attack of electrogenerated active chlorine was found to be the main degradation route. After only 20 min of treatment, the process decreased more than 90% of the initial concentration of antibiotics, following the degradation order: fluoroquinolones > penicillins > cephalosporins. The primary interactions of the degrading agent with fluoroquinolones occurred at the cyclic amine (i.e., piperazyl ring) and the benzene ring. Meanwhile, the cephalosporins and penicillins were initially attacked on the β-lactam and sulfide groups. However, the tested penicillins presented an additional reaction on the central amide. In all cases, the transformations of antibiotics led to the antimicrobial activity decreasing. On the contrary, the toxicity level showed diverse results: increasing, decreasing, and no change, depending on the antibiotic type. In fact, due to the conservation of quinolone nucleus in the fluoroquinolone by-products, the toxicity of the treated solutions remained unchanged. With penicillins, the production of chloro-phenyl-isoxazole fragments increased the toxicity level of the resultant solution. However, the opening of β-lactam ring of cephalosporin antibiotics decreased the toxicity level of the treated solutions. Finally, the application of the treatment to synthetic hospital wastewater and seawater containing a representative antibiotic showed that the high amount of chloride ions in seawater accelerates the pollutant degradation. In contrast, the urea and ammonium presence in the hospital wastewater retarded the removal of this pharmaceutical.

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Electrosynthesis and characterization of nanostructured manganese dioxide thin film on stainless steel electrode for electrochemical degradation of phenol

Takhedmit,

Cherchour,

Tighidet

et al. 2024

Ionics

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Electrochemical treatment of shrimp farming effluent: role of electrocatalytic material

Cited by 14 publications

References 28 publications

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Electrochemical treatment of penicillin, cephalosporin, and fluoroquinolone antibiotics via active chlorine: evaluation of antimicrobial activity, toxicity, matrix, and their correlation with the degradation pathways

Electrosynthesis and characterization of nanostructured manganese dioxide thin film on stainless steel electrode for electrochemical degradation of phenol

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