dc.contributor.author |
Witharana, WPWS |
|
dc.contributor.author |
Prabath, DHL |
|
dc.contributor.author |
Madushanka, RS |
|
dc.contributor.author |
Rohitha, LPS |
|
dc.contributor.author |
Dissanayake, DMDOK |
|
dc.contributor.editor |
Dissanayake, DMDOK |
|
dc.contributor.editor |
Jayawardena, CL |
|
dc.date.accessioned |
2022-02-28T06:06:03Z |
|
dc.date.available |
2022-02-28T06:06:03Z |
|
dc.date.issued |
2021-12 |
|
dc.identifier.citation |
Witharana, W.P.W.S., Prabath, D.H.L., Madushanka, R.S., Rohitha, L.P.S., Dissanayake, D.M.D.O.K. (2021). Extraction of rare earths from monazite in Pulmoddai deposit. In D.M.D.O.K. Dissanayake & C.L. Jayawardena (Eds.), Proceedings of International Symposium on Earth Resources Management & Environment 2021 (pp. 135-142). Department of Earth Resources Engineering, University of Moratuwa. https://uom.lk/sites/default/files/ere/files/ISERME%202021%20Proceedings_2.pdf |
en_US |
dc.identifier.uri |
http://dl.lib.uom.lk/handle/123/17101 |
|
dc.description.abstract |
Rear earth elements (REEs) have considerable demand in the world and higher market value
due to various applications, emerging economies, and continuous depletion of rare earth
(RE) metals. Monazite is a perfect source for REEs (61%) and consists of RE and Thorium
Phosphate. The Phosphate component was removed by alkaline leaching using NaOH (80
W/V%) at 1800° C for 4 hours at 500 rpm. Thorium was removed by acid leaching using (60
W/V%) HCl at 90° C for 1hour at 500 rpm and 15% pulp density. The solvent extraction
method was carried out to separate and purify RE-Oxides from other impurities. 50%
Tributyl phosphate (TBP) in kerosene was used as an organic phase with available facilities,
and an experiment was done for phase ratio 1 and phase ratio 2, for 3, 6, and 12 minutes of
contact time. Inductively coupled plasma mass spectrometry (ICP-MS) analysis was done for
elemental analysis. Most abundant REEs in Monazite were Cerium (39%), Lanthanum (20%),
Neodymium (12%) and Praseodymium (4%). The main objective of this research was to
identify an industrial-level efficient method for separating and purifying RE from Monazite.
Economically viable industrial level extraction of REEs was obtained when the phase ratio
equals one and 3 minutes contact time. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Department of Earth Resources Engineering, University of Moratuwa |
en_US |
dc.relation.uri |
https://uom.lk/sites/default/files/ere/files/ISERME%202021%20Proceedings_2.pdf |
en_US |
dc.subject |
Acid leaching |
en_US |
dc.subject |
Alkaline leaching |
en_US |
dc.subject |
Dephosphorization |
en_US |
dc.subject |
Solvent extraction |
en_US |
dc.subject |
Rear earth |
en_US |
dc.title |
Extraction of rare earths from monazite in Pulmoddai deposit |
en_US |
dc.type |
Conference-Full-text |
en_US |
dc.identifier.faculty |
Engineering |
en_US |
dc.identifier.department |
Department of Earth Resources Engineering |
en_US |
dc.identifier.year |
2021 |
en_US |
dc.identifier.conference |
International Symposium on Earth Resources Management & Environment 2021 |
en_US |
dc.identifier.place |
Colombo |
en_US |
dc.identifier.pgnos |
pp. 135-142 |
en_US |
dc.identifier.proceeding |
Proceedings of International Symposium on Earth Resources Management & Environment 2021 |
en_US |
dc.identifier.email |
rohitha@uom.lk |
en_US |
dc.identifier.email |
dmdok@uom.lk |
en_US |