Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram
The objective of this study is to construct Pourbaix diagram (Eh-pH diagram) for Lanthanum (La), Cerium (Ce) and Neodymium (Nd) elements at elevated temperatures. The Pourbaix diagram is able to map the stability area of the aqueous system, which will be useful to determine the process conditions th...
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| Format: | Conference or Workshop Item |
| Language: | English English |
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Elsevier Ltd
2019
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| Online Access: | http://umpir.ump.edu.my/id/eprint/36671/1/Thermodynamic%20evaluation%20of%20the%20aqueous%20stability%20of%20rare%20earth%20elements%20.pdf http://umpir.ump.edu.my/id/eprint/36671/2/Thermodynamic%20evaluation%20of%20the%20aqueous%20stability%20of%20rare%20earth%20elements_FULL.pdf |
| _version_ | 1825814791175798784 |
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| author | Yahya, Fatin Nasuha Mat Suli, Liyana Nadirah Wan Ibrahim, W. H. Abdul Rasid, Ruwaida |
| author_facet | Yahya, Fatin Nasuha Mat Suli, Liyana Nadirah Wan Ibrahim, W. H. Abdul Rasid, Ruwaida |
| author_sort | Yahya, Fatin Nasuha |
| collection | UMP |
| description | The objective of this study is to construct Pourbaix diagram (Eh-pH diagram) for Lanthanum (La), Cerium (Ce) and Neodymium (Nd) elements at elevated temperatures. The Pourbaix diagram is able to map the stability area of the aqueous system, which will be useful to determine the process conditions that favor dissolution and possible rare earth (RE) metals that may be present in the system. In this work the process condition is based on the sulfuric acid leaching of monazite concentrate and it is carried out using HSC Chemistry 8.0 software. Addition of the sulfate ions from the sulfuric acid as the leaching solvent, introduces soluble metal-sulfate complexes. With temperature increase, the stability of these complexes increases. This can be observed based on the increased area in the Eh-pH diagram. Comparing the 3 rare earth elements in this study, it was determined that at elevated temperatures the order of stability is Ce>Nd>La. |
| first_indexed | 2024-03-06T13:03:48Z |
| format | Conference or Workshop Item |
| id | UMPir36671 |
| institution | Universiti Malaysia Pahang |
| language | English English |
| last_indexed | 2024-03-06T13:03:48Z |
| publishDate | 2019 |
| publisher | Elsevier Ltd |
| record_format | dspace |
| spelling | UMPir366712023-01-10T04:00:14Z http://umpir.ump.edu.my/id/eprint/36671/ Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram Yahya, Fatin Nasuha Mat Suli, Liyana Nadirah Wan Ibrahim, W. H. Abdul Rasid, Ruwaida QD Chemistry TP Chemical technology The objective of this study is to construct Pourbaix diagram (Eh-pH diagram) for Lanthanum (La), Cerium (Ce) and Neodymium (Nd) elements at elevated temperatures. The Pourbaix diagram is able to map the stability area of the aqueous system, which will be useful to determine the process conditions that favor dissolution and possible rare earth (RE) metals that may be present in the system. In this work the process condition is based on the sulfuric acid leaching of monazite concentrate and it is carried out using HSC Chemistry 8.0 software. Addition of the sulfate ions from the sulfuric acid as the leaching solvent, introduces soluble metal-sulfate complexes. With temperature increase, the stability of these complexes increases. This can be observed based on the increased area in the Eh-pH diagram. Comparing the 3 rare earth elements in this study, it was determined that at elevated temperatures the order of stability is Ce>Nd>La. Elsevier Ltd 2019 Conference or Workshop Item PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/36671/1/Thermodynamic%20evaluation%20of%20the%20aqueous%20stability%20of%20rare%20earth%20elements%20.pdf pdf en http://umpir.ump.edu.my/id/eprint/36671/2/Thermodynamic%20evaluation%20of%20the%20aqueous%20stability%20of%20rare%20earth%20elements_FULL.pdf Yahya, Fatin Nasuha and Mat Suli, Liyana Nadirah and Wan Ibrahim, W. H. and Abdul Rasid, Ruwaida (2019) Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram. In: Materials Today: Proceedings; 2018 International Conference on Chemical Sciences and Engineering: Advance and New Materials, ICCSE 2018 , 7 - 8 November 2018 , Melaka. 1647 -1656., 19 (157391). ISSN 2214-7853 (Published) https://doi.org/10.1016/j.matpr.2019.11.193 |
| spellingShingle | QD Chemistry TP Chemical technology Yahya, Fatin Nasuha Mat Suli, Liyana Nadirah Wan Ibrahim, W. H. Abdul Rasid, Ruwaida Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram |
| title | Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram |
| title_full | Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram |
| title_fullStr | Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram |
| title_full_unstemmed | Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram |
| title_short | Thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram |
| title_sort | thermodynamic evaluation of the aqueous stability of rare earth elements in sulfuric acid leaching of monazite through pourbaix diagram |
| topic | QD Chemistry TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/36671/1/Thermodynamic%20evaluation%20of%20the%20aqueous%20stability%20of%20rare%20earth%20elements%20.pdf http://umpir.ump.edu.my/id/eprint/36671/2/Thermodynamic%20evaluation%20of%20the%20aqueous%20stability%20of%20rare%20earth%20elements_FULL.pdf |
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