Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volume
Rare-earth (RE) industries generate a massive amount of radioactive residue containing high thorium concentrations. Due to the fact that thorium is considered a non-economic element, large volume of these RE processed residues are commonly disposed of without treatment. It is essential to study an a...
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doaj-b580b246631143e08413d0359ce346b12021-07-17T04:32:48ZengElsevierNuclear Engineering and Technology1738-57332021-09-0153929262936Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volumeEli Syafiqah Aziman0Aznan Fazli Ismail1Nabilla Abdul Muttalib2Muhammad Syafiq Hanifah3Nuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, MalaysiaNuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia; Nuclear Technology Research Centre, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia; Corresponding author. Nuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.Nuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, MalaysiaNuclear Science Programme, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, MalaysiaRare-earth (RE) industries generate a massive amount of radioactive residue containing high thorium concentrations. Due to the fact that thorium is considered a non-economic element, large volume of these RE processed residues are commonly disposed of without treatment. It is essential to study an appropriate treatment that could reduce the volume of waste for final disposition. To this end, this research investigates the applicability of carbon-based adsorbent in separating thorium from aqueous phase sulphate is obtained from the cracking and leaching process of solid rare-earth by-product residue. Adsorption of thorium from the aqueous phase sulphate by carbon-based electrodes was investigated through electrosorption experiments conducted at a duration of 180 minutes with a positive potential variable range of +0.2V to +0.6V (vs. Ag/AgCl). Through this research, the specific capacity obtained was equivalent to 1.0 to 5.14 mg-Th/g-Carbon. Furthermore, electrosorption of thorium ions from aqueous phase sulphate is found to be most favorable at a higher positive potential of +0.6V (vs. Ag/AgCl). This study's findings elucidate the removal of thorium from the rare-earth residue by carbon-based electrodes and simultaneously its potential to reduce disposal waste of untreated residue.http://www.sciencedirect.com/science/article/pii/S1738573321001753Radioactive wasteThoriumCarbon-based electrodeElectrosorption |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Eli Syafiqah Aziman Aznan Fazli Ismail Nabilla Abdul Muttalib Muhammad Syafiq Hanifah |
spellingShingle |
Eli Syafiqah Aziman Aznan Fazli Ismail Nabilla Abdul Muttalib Muhammad Syafiq Hanifah Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volume Nuclear Engineering and Technology Radioactive waste Thorium Carbon-based electrode Electrosorption |
author_facet |
Eli Syafiqah Aziman Aznan Fazli Ismail Nabilla Abdul Muttalib Muhammad Syafiq Hanifah |
author_sort |
Eli Syafiqah Aziman |
title |
Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volume |
title_short |
Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volume |
title_full |
Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volume |
title_fullStr |
Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volume |
title_full_unstemmed |
Investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volume |
title_sort |
investigation of thorium separation from rare-earth extraction residue via electrosorption with carbon based electrode toward reducing waste volume |
publisher |
Elsevier |
series |
Nuclear Engineering and Technology |
issn |
1738-5733 |
publishDate |
2021-09-01 |
description |
Rare-earth (RE) industries generate a massive amount of radioactive residue containing high thorium concentrations. Due to the fact that thorium is considered a non-economic element, large volume of these RE processed residues are commonly disposed of without treatment. It is essential to study an appropriate treatment that could reduce the volume of waste for final disposition. To this end, this research investigates the applicability of carbon-based adsorbent in separating thorium from aqueous phase sulphate is obtained from the cracking and leaching process of solid rare-earth by-product residue. Adsorption of thorium from the aqueous phase sulphate by carbon-based electrodes was investigated through electrosorption experiments conducted at a duration of 180 minutes with a positive potential variable range of +0.2V to +0.6V (vs. Ag/AgCl). Through this research, the specific capacity obtained was equivalent to 1.0 to 5.14 mg-Th/g-Carbon. Furthermore, electrosorption of thorium ions from aqueous phase sulphate is found to be most favorable at a higher positive potential of +0.6V (vs. Ag/AgCl). This study's findings elucidate the removal of thorium from the rare-earth residue by carbon-based electrodes and simultaneously its potential to reduce disposal waste of untreated residue. |
topic |
Radioactive waste Thorium Carbon-based electrode Electrosorption |
url |
http://www.sciencedirect.com/science/article/pii/S1738573321001753 |
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