Application of electrocoagulation for removal of toxic metals from industrial effluents

Krystyník, Pavel; Mašín, Pavel; Krusinova, Zuzana; Klusoň, Petr

doi:10.1007/s13762-018-2074-3

Cited by 14 publications

(9 citation statements)

References 16 publications

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“…Ca(OH) 2 addition was applied to enhance removal of Ni 2+ by an increase in pH. All process parameters were optimized as published before [16].…”

Section: Resultsmentioning

confidence: 99%

“…Unlike CC, electrocoagulation does not require the addition of any external coagulating agent as it is formed in situ under optimized process conditions. The process can be supported by the addition of Ca(OH) 2 as it is beneficial for low concentrations of Ni 2+ in treated effluent [16]. It does not serve for precipitation of Cr(OH) 3 as this is ensured during the electrocoagulation step.…”

Section: Introductionmentioning

confidence: 99%

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Ecologically Non-Invasive Decontamination of Natura 2000 Locality from Old Deposits of Hexavalent Chromium and Bivalent Nickel by Modular Electrocoagulation Combined with Ca(OH)2 Addition

Krystyník

Mašín

Krusinova

et al. 2020

Water

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A modular electrocoagulation unit, supported by Ca(OH)2 addition to treated water, was operated in the vicinity of a Natura 2000 site for the removal of Cr6+ or Ni2+ from contaminated groundwater. The process was performed at a constant flow rate of 350 L/h. Day 0 concentrations of Cr6+ and Ni2+ started at 91.6 mg/L for Ni2+ and 43 mg/L for Cr and during testing, were decreased by 15%–25%. Residual concentrations of Crtot. and Ni2+ below the required limits of 0.5 mg/L for Crtot. and 0.8 mg/L for Ni2+ can be achieved with the electrocoagulation unit and total removal efficiencies often exceeded 98%. The overall economic assessment showed its feasible application for removal of Cr6+ and Ni2+ on sites with requirements of high environmental protection standards. The polluted area was about 150 × 150 m (22,500 m2), and it contained approximately 78,750 m3 of water contaminated with Cr6+ and Ni2+ (over 41 and 91 mg/L, respectively). The modular arrangement might allow a scaling up. The process’ output could be thus increased according to the number of EC modules in operation.

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“…Ca(OH) 2 addition was applied to enhance removal of Ni 2+ by an increase in pH. All process parameters were optimized as published before [16].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ecologically Non-Invasive Decontamination of Natura 2000 Locality from Old Deposits of Hexavalent Chromium and Bivalent Nickel by Modular Electrocoagulation Combined with Ca(OH)2 Addition

Krystyník

Mašín

Krusinova

et al. 2020

Water

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“…It is also successfully used for the treatment of industrial wastewater from the pulp and paper industry, textile industry, food industry, etc. [29][30][31][32]. Table 3 gives a summary of related studies and applications of EC in the treatment of different wastewaters with different pollutants.…”

Section: Electrode Materialsmentioning

confidence: 99%

Mechanism of the electrocoagulation process and its application for treatment of wastewater: A review

Jovanović¹,

Velinov²,

Petrović³

et al. 2021

Adv Techol

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Treatment of wastewater, especially of industrial origin, is a major challenge. Although wastewater treatment methods have already been established, active efforts are being made to develop more efficient and economical methods. In recent years, the attention has been focused on electrochemical methods, most of which are focused on electrocoagulation. This paper gives a detailed description of the mechanism of the electrocoagulation process, as well as the application of this method in wastewater treatment of different origins.

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“…Electrochemical methods allow one to extract valuable components from effluents with a relatively simple automated technological scheme of treatment, often without the use of chemical reagents. The main disadvantage of these methods is the high cost of electricity [32][33][34][35][36][37][38][39][40][41][42].…”

Section: Analysis Of Previous Studiesmentioning

confidence: 99%

Optimization of dose calculation of modified magnetite during sorption purification of water from copper ions to create environmentally friendly technology

et al. 2021

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Due to the growth of man-caused pollution, there is a need to use modern methods of water purification. It is advisable to use sorption methods for the extraction of heavy metals, which are considered to be particularly dangerous. It is established that sorbents based on magnetite are quite effective in the extraction of copper ions. It is shown that the sorption capacity of magnetite-based sorbents towards copper ions depends on the ratio of concentrations of Fe2+ and Fe3+ ions in the reaction mixture, and increases with increasing this indicator from 1/2 to 2. The sorption capacity of the sorbent towards copper ions increases by 4.4 times. It is shown that the efficiency of copper ions removal onto magnetite increases for sorbent modified with sodium sulfide. The proposed scheme provides the possibility of sorption treatment of large volumes of water from copper ions to the norms for the discharge of wastewater into fishery reservoirs. Post-productional magnetite is dehydrated and supplied to metallurgical enterprises for processing. The developed technology of water purification from copper ions is environmentally safe and energy efficient.

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Application of electrocoagulation for removal of toxic metals from industrial effluents

Cited by 14 publications

References 16 publications

Ecologically Non-Invasive Decontamination of Natura 2000 Locality from Old Deposits of Hexavalent Chromium and Bivalent Nickel by Modular Electrocoagulation Combined with Ca(OH)2 Addition

Ecologically Non-Invasive Decontamination of Natura 2000 Locality from Old Deposits of Hexavalent Chromium and Bivalent Nickel by Modular Electrocoagulation Combined with Ca(OH)2 Addition

Mechanism of the electrocoagulation process and its application for treatment of wastewater: A review

Optimization of dose calculation of modified magnetite during sorption purification of water from copper ions to create environmentally friendly technology

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