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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


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