Removal of nickel from Ni(II)-NH3-SO2-CO2-H2O system by electrocoagulation, sedimentation and filtration processes

Original scientific paper


  • Armando Rojas Vargas Empresa de Servicios Técnicos de Computación, Comunicaciones y Electrónica "Rafael Fausto Orejón Forment", Holguín, Cuba and Universidad de Holguín “Oscar Lucero Moya”, Holguín, Cuba
  • María Elena Magaña Haynes Centro de Investigaciones del Níquel “Alberto Fernández Monte de Oca”, Holguín, Cuba
  • Crispin Sánchez Guillen Centro de Investigaciones del Níquel “Alberto Fernández Monte de Oca”, Holguín, Cuba
  • Forat Yasir AlJaberi Chemical Engineering Department, Chemical Engineering Department, College of Engineering, Al-Muthanna University, Al-Muthanna, Iraq



Electrocoagulation, kinetics, nickel removal, layered double hydroxide
Graphical Abstract


The nickel removal by electrocoagulation of Ni(II)-NH3-CO2-SO2-H2O system was studied in a batch reactor of 50 L useful volume, with stirring and two pairs of aluminum electrodes. The operating parameters were nickel concentration between 255 and 342 mg L-1, current density of 11.0 and 16.6 mA cm-2, pH 8.34±0.06, mean temperature 58.4±3.9 °C and retention time of 50 min. The maximum nickel removal was 99.7 % at 11.0 mA cm-2, specific energy consumption 16.86 kWh kg-1 of Al3+, 2.438 kWh kg-1 of Ni and the adsorption capacity 5819 mg Ni g-1 of Al3+. The precipitate contained a nickel content of 37.2 % and a true density of 2720 kg m-3, hydro­talcite-like structure layered double hydroxides. The unit area of sedimentation was between 0.25 and 1.96 m2 t-1 day, at a density from 971 to 1019 kg m-1 and 53±4 °C. A model for pre­dicting the specific cake resis­tance was estimated as a function of pressure drop and sus­pension concentration at 44.45 kPa and 59.52 kg m-3, resulting in the value of 6.47±107 m kg-1. The average cake humidity was 88 % base humid.


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06-07-2022 — Updated on 06-07-2022

How to Cite

Vargas, A. R., Haynes, M. E. M., Guillen, C. S., & Yasir AlJaberi, F. (2022). Removal of nickel from Ni(II)-NH3-SO2-CO2-H2O system by electrocoagulation, sedimentation and filtration processes: Original scientific paper. Journal of Electrochemical Science and Engineering, 13(2), 373–391.



Electrochemical Engineering