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Article

Adsorption Capacity of Organic Compounds Using Activated Carbons in Zinc Electrowinning

1
Center for Plant Engineering, Institute for Advanced Engineering, Yongin-si 17180, Korea
2
WESCO Electrode, Changwon-si, Gyeongsangnam-do 642370, Korea
*
Author to whom correspondence should be addressed.
Energies 2019, 12(11), 2169; https://doi.org/10.3390/en12112169
Received: 7 May 2019 / Revised: 29 May 2019 / Accepted: 3 June 2019 / Published: 6 June 2019
The influence of adsorbate (D2EPHA and kerosene) on the process of zinc electrowinning from sulfuric acid electrolytes was analyzed. The main objective was to critically compare three factors: (1) Three types of activated carbon (AC); (2) adsorption temperatures and contact time; and (3) zinc recovery efficiency. The results showed that organic components reduced the efficiency of zinc recovery. Moreover, wood-based ACs had a higher adsorption capacity than coal- and coconut-based ACs. To maintain a removal efficiency of 99% or more, wood-based ACs should constitute at least 60% of the adsorbate. The temperature of adsorption did not affect the removal efficiency. Additionally, the feeding rate of adsorbate in the solvent was inversely proportional to the removal efficiency. A feeding rate of the liquid pump of over 3 mL/min rapidly increased the delta pressure. For the same contact time, 99% of adsorbate removal occurred at 1 mL/min compared to approximately 97% at 0.5 mL/min. In the presence of 100 mg/L zinc, with increasing adsorbate from 0–5%, the recovery efficiency of zinc decreased from 100% to 0% and the energy consumption increased from 0.0017–0.003 kwh/kg zinc. Considering the energy consumption and zinc deposit mass, 0.1% of the adsorbate is recommended for zinc electrowinning. View Full-Text
Keywords: zinc (Zn); electrowinning (EW); activated Carbons (ACs); adsorbate; liquid phase space velocity (LHSV); temperature zinc (Zn); electrowinning (EW); activated Carbons (ACs); adsorbate; liquid phase space velocity (LHSV); temperature
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MDPI and ACS Style

Park, J.E.; Kim, E.J.; Park, M.-J.; Lee, E.S. Adsorption Capacity of Organic Compounds Using Activated Carbons in Zinc Electrowinning. Energies 2019, 12, 2169. https://doi.org/10.3390/en12112169

AMA Style

Park JE, Kim EJ, Park M-J, Lee ES. Adsorption Capacity of Organic Compounds Using Activated Carbons in Zinc Electrowinning. Energies. 2019; 12(11):2169. https://doi.org/10.3390/en12112169

Chicago/Turabian Style

Park, Jung E., Eun J. Kim, Mi-Jung Park, and Eun S. Lee 2019. "Adsorption Capacity of Organic Compounds Using Activated Carbons in Zinc Electrowinning" Energies 12, no. 11: 2169. https://doi.org/10.3390/en12112169

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