Removal of indigo carmine dye by electrocoagulation using magnesium anodes with polarity change

Donneys-Victoria, Dayana; Bermúdez-Rubio, David; Torralba-Ramírez, Brian; Marriaga-Cabrales, Nilson; Machuca-Martínez, Fiderman

doi:10.1007/s11356-019-04160-y

Cited by 26 publications

(5 citation statements)

References 41 publications

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“…NaCl solution was prepared by dissolving 5000 mg of sodium chloride (Sigma Aldrich-reagent grade) in 1 L of purified water obtained by drinking water distillation, previously filtered (0.45 μm) and subjected to adsorption with activated carbon, in a Water Pro PS Labconco equipment. To measure the pH and electrical conductivity (mS cm −1 at 25 °C) a multiparameter sensor Thermo Scientific Orion Star A329 was used [5], [6].…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Data on energy consumption in the production of layered double hydroxides

2019

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Electrocoagulation consists of the in-situ generation of the coagulant by the electro dissolution of sacrificial electrodes (Mg and Al). This technique, besides being normally used for water treatment, can be used to synthesize Layered Double Hydroxides (LDH) or Hydrotalcites (HT) such as green rust, MgAlCl/LDH, and other oxides as Magnetite. The HT has a high tendency for water in the interlayer to be replaced by anions, these exchange characteristics generate a high interest in the fields of drug administration, photodegradation, catalyst supports, supercapacitors, and water oxidation. There are several routes of synthesis for these compounds such as co-precipitation, hydrolysis of urea, hydrothermal treatment and a novel route by electrocoagulation (EC).This work discloses the data of the energy consumption at laboratory-scale production in the synthesis of hydrotalcite (HT) or Layered Double Hydroxides (LDH) by electrocoagulation, the values obtained through these experiments are intended to provide support due to the lack of information on the energy consumption of this novel production method. Aluminum and AZ31 electrodes were used as a cations source during two- and four-hours operation, at 50 °C with 5 mA cm−2 of current density, and 5 minutes of polarity change for Aluminum and 8 minutes for AZ31 (Magnesium alloy).

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Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Data on energy consumption in the production of layered double hydroxides

2019

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“…It was clear that the TP removal efficiency of Mg was the best. This is because Mg has a reduced negative potential [70], and it was hard to form a protective film on its surface. In the case of power, it can quickly dissolve Mg 2+ into the solution, but the energy consumption of Mg was the maximum.…”

Section: Effects Of Initial Phmentioning

confidence: 99%

Study on Influencing Parameters of Total Phosphorus Degradation in Cattle Farm Wastewater by Electrocoagulation Using Magnesium, Aluminum, and Iron Electrodes

Chen,

Li,

Xie

2023

Water

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Magnesium, aluminum, and iron electrode were common anodes in electrocoagulation (EC), but there were few studies comparing the influence of operating parameters on the reaction and the effects of these three different anodes in removing total phosphorus (TP) in cattle farm wastewater (CFW). This study used these three different electrodes as the anode of the electrocoagulation method. The operating parameters such as electrode distance (ED), initial pH, and voltage were examined by the Taguchi method and single-factor method. The result of Taguchi analysis shows that voltage has a significant impact on TP removal of magnesium (Mg) and aluminum anode (Al), and ED has a significant impact on TP removal of magnesium and iron anode (Fe). Among the three operating parameters, the first in the order of the impact on the reaction was ED because ED has the greatest influence on the dissolution of the anode. The result of single-factor analysis shows that the optimum conditions of Mg were ED = 3 cm, voltage = 5 V, pH = 7, Al were ED = 3 cm, voltage = 5 V, pH = 5, and Fe were ED = 3 cm, voltage = 5 V, and pH = 7. For Mg and Fe, the voltage and reaction results follow the second-order reaction kinetics, and Al is the first-order reaction kinetics. Through comparison of the three anodes, it was found that Al worked best in actual CFW. It was noted that the conditions obtained by the single-factor method were more economical in the treatment of actual CFW. This work could provide reference for determining the extent of the influence of operating parameters when other contaminants are removed, and provide reference for comparing the other anodes in EC.

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“…Since chromium is the main problem in this process, most treatments for these waters focus on the reduction and reuse of this element, followed by treatment for COD, BOD and TDS. These technologies include chemical coagulation processes [ 76 , 77 ] electrocoagulation [ 78 ], absorption, advanced oxidation processes [ 79 ] and biological processes such as phytoremediation [ 13 , 14 ].…”

Section: Technologies For the Treatment Of Tannery Wastewatermentioning

confidence: 99%

“…Coagulation has been widely used due to its ease of operation; however, the generation of secondary waste from this process requires the greatest attention [ 6 , 78 ]. This method adds compounds such as aluminum sulfate and ferric chloride, which affect the removal of suspended solids, COD and chromium up to 46%, 37% and 99% at optimal concentrations of the coagulant and optimal pH ranges (7.5), respectively [ 78 ]. In addition, it works as a pretreatment method for tannery wastewater as it allows removing chromium and limiting its inhibitory effect on biological processes [ 79 ].…”

Section: Technologies For the Treatment Of Tannery Wastewatermentioning

confidence: 99%

Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

2021

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The tannery industry is one of the economic sectors that contributes to the development of different countries. Globally, Europe and Asia are the main producers of this industry, although Latin America and Africa have been growing considerably in recent years. With this growth, the negative environmental impacts towards different ecosystem resources as a result of the discharges of recalcitrated pollutants, have led to different investigations to generate alternative solutions. Worldwide, different technologies have been studied to address this problem, biological and physicochemical processes have been widely studied, presenting drawbacks with some recalcitrant compounds. This review provides a context on the different existing technologies for the treatment of tannery wastewater, analyzing the physicochemical composition of this liquid waste, the impact it generates on human health and ecosystems and the advances in the different existing technologies, focusing on advanced oxidation processes and the use of microalgae. The coupling of advanced oxidation processes with biological processes, mainly microalgae, is seen as a viable biotechnological strategy, not only for the removal of pollutants, but also to obtain value-added products with potential use in the biorefining of the biomass.

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Removal of indigo carmine dye by electrocoagulation using magnesium anodes with polarity change

Cited by 26 publications

References 41 publications

Data on energy consumption in the production of layered double hydroxides

Data on energy consumption in the production of layered double hydroxides

Study on Influencing Parameters of Total Phosphorus Degradation in Cattle Farm Wastewater by Electrocoagulation Using Magnesium, Aluminum, and Iron Electrodes

Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

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