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Remoción de níquel por electrocoagulación del sistema Ni(II)-NH3-CO2-SO2-H2O con electrodos de aluminio


 
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Tecnología Química

 ISSN 2224-6185

ROJAS-VARGAS, Armando; RICARDO-RIVERON, Aymara; PENEDO-MEDINA, Margarita    OJEDA-ARMAIGNAC, Elaine. Remoción de níquel por electrocoagulación del sistema Ni(II)-NH3-CO2-SO2-H2O con electrodos de aluminio. []. , 40, 2, pp.393-412.   30--2020. ISSN 2224-6185.

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Se estudió la remoción de níquel por electrocoagulación del sistema Ni(II)-NH3-CO2-SO2-H2O, contenido en el licor efluente del sedimentador de carbonato básico de níquel de la planta productora de níquel por la Tecnología de Lixiviación Carbonato Amoniacal, en Punta Gorda, Cuba. Se realizó un diseño experimental completo, con un nivel central y 3 réplicas; y los factores densidad de corriente, pH, temperatura y tiempo de electrólisis. La concentración inicial de níquel fue de 660 mg/L; el volumen de licor, 500 mL, el par de electrodos Al/Al, separados 10 mm, con un área efectiva de 4,6·10-3 m2. Las condiciones más favorables se lograron a 9,8 mA/cm2, 60ºC, pH=8,65 y 40 min de electrólisis, para una remoción de un 95%, consumo específico de energía y costo de operación de 5,41 kW-h/kg Al y 712 $/t Ni respectivamente.

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The nickel removal was studied by electrocoagulation of the Ni(II)-NH3-CO2-SO2-H2O system, content in the effluent liquor of nickel basic carbonate settler tank of the nickel producing plant by the Ammoniacal Carbonate Leaching Technology, in Punta Gorda, Cuba. A complete experimental design was carried out, with a central level and 3 replicas; and the factors current density, pH, temperature and electrolysis time. The initial nickel concentration was 660 mg/L; the volume of liquor, 500 mL, the pair of electrodes Al/Al, separated 10 mm, with an effective area of ​​4,6 · 10-3 m2. The most favorable conditions were achieved at 9,8 mA/cm2, 60 °C, pH = 8,65 and 40 min of electrolysis, for a 95% removal, specific energy consumption and the operating cost of 5,41 kW-h/kg Al and 712 $/t Ni respectively.

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