<abstract xmlns="http://www.w3.org/1999/xhtml">To examine the efficiency of La and Ce recycling processes from the sludge, two major methods were used, namely leaching and precipitation. The findings suggest that 12% of La and 24.2% of Ce were contained in the sludge. The sludge was leached in an optimum condition of 6N HCl at a temperature of 70°C with a 3g/50 mL solid/liquid ratio for 3 h to obtain a 100% leaching recovery of La and Ce. After pH adjustment of the obtained La and Ce optimum leaching solution to 6 with NH4OH and a simultaneous addition of H2O2 in a ratio of 1:1, Ce precipitated out with 65.9% recovery. On the other hand, La was not precipitated. The results obtained in this study reveal that leaching and pH adjustment method could be used to recover the valuable REE of La and Ce from glass polishing sludge in order to reach the goals of resource recycling.</abstract>

To examine the efficiency of La and Ce recycling processes from the sludge, two major methods were used, namely leaching and precipitation. The findings suggest that 12% of La and 24.2% of Ce were contained in the sludge. The sludge was leached in an optimum condition of 6N HCl at a temperature of 70°C with a 3g/50 mL solid/liquid ratio for 3 h to obtain a 100% leaching recovery of La and Ce. After pH adjustment of the obtained La and Ce optimum leaching solution to 6 with NH4OH and a simultaneous addition of H2O2 in a ratio of 1:1, Ce precipitated out with 65.9% recovery. On the other hand, La was not precipitated. The results obtained in this study reveal that leaching and pH adjustment method could be used to recover the valuable REE of La and Ce from glass polishing sludge in order to reach the goals of resource recycling.

Recycling of Cerium and Lanthanum from Glass Polishing Sludge

Department of Biological and Chemical Sciences

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Recycling of Cerium and Lanthanum from Glass Polishing Sludge"}

To examine the efficiency of La and Ce recycling processes from the sludge, two major methods were used, namely leaching and precipitation. The findings...

Recycling of Cerium and Lanthanum from Glass Polishing Sludge

Published Online: Dec 31, 2019

Page range: 26 - 30

DOI: https://doi.org/10.2478/pjct-2019-0035

Keywords
Cerium, Lanthanum, Waste, Sludge, Leaching, Recycling

© 2019 Ching-Hwa Lee et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Recycling of Cerium and Lanthanum from Glass Polishing Sludge

Published Online: Dec 31, 2019

Page range: 26 - 30

DOI: https://doi.org/10.2478/pjct-2019-0035

KeywordsCerium, Lanthanum, Waste, Sludge, Leaching, Recycling

© 2019 Ching-Hwa Lee et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Cerium, Lanthanum, Waste, Sludge, Leaching, Recycling