Kajian penghadaman residu pemurnian larut resap air (WLP) untuk kebarangkalian pengekstrakan torium

Translated title of the contribution: Digestion study of Water Leach Purification (WLP) residue for possibility of thorium extraction

Wadeeah M. Al-Areqi, Amran Ab. Majid, Sukiman Sarmani

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Water leach purification (WLP) is the main residue being produced by Lynas Advanced Materials Plant (LAMP). During rare earths elements extraction process, thorium is removed completely to WLP. The objective of this study was to extract thorium from WLP in order to reduce the level of radioactivity and to store Th for future nuclear fuel. Alkali and concentrated acids process was used to recover the Th from WLP. The concentration of Th and U in WLP was determined by Instrumental Neutron Activation Analysis (INAA) and found to be 1952.9 ± 17.6 mg/kg and 17.2 ± 2.4 mg/kg respectively. Digestion process of WLP via sodium hydroxide, concentrated nitric and sulphuric acids using different time and temperature has been tested. The Th concentrations in liquid phrase were determined by Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS). In both processes less than 5% recovery of Th has been achieved. This study showed that very low Th recovery was achieved due to thorium was probably converted into refractory and insoluble form through the calcination stage of LAMP processing. Therefore different techniques should be used to recover the thorium.

Original languageUndefined/Unknown
Pages (from-to)221-225
Number of pages5
JournalMalaysian Journal of Analytical Sciences
Volume18
Issue number1
Publication statusPublished - 2014

Fingerprint

Thorium
Purification
Water
Nitric Acid
Recovery
Sodium Hydroxide
Neutron activation analysis
Radioactivity
Nuclear fuels
Alkalies
Inductively coupled plasma
Rare earth elements
Refractory materials
Calcination
Spectroscopy
Acids
Liquids
Processing

Keywords

  • Digestion
  • Th recovery
  • Thorium
  • WLP

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Kajian penghadaman residu pemurnian larut resap air (WLP) untuk kebarangkalian pengekstrakan torium. / Al-Areqi, Wadeeah M.; Ab. Majid, Amran; Sarmani, Sukiman.

In: Malaysian Journal of Analytical Sciences, Vol. 18, No. 1, 2014, p. 221-225.

Research output: Contribution to journalArticle

Al-Areqi, Wadeeah M. ; Ab. Majid, Amran ; Sarmani, Sukiman. / Kajian penghadaman residu pemurnian larut resap air (WLP) untuk kebarangkalian pengekstrakan torium. In: Malaysian Journal of Analytical Sciences. 2014 ; Vol. 18, No. 1. pp. 221-225.
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