Thorium extraction from thorium tetrachloride aqueous solution (ThCl4) was performed by using organic solution of Di-(2-ethylhexyl) phosphoric acid in kerosene (D 2 EHPA/K). The study aims to determine the organic concentration parameter in the solvent and the mixing time that influences the extraction efficiency. Mix thorium-rare earth hydroxide (Th-RE)(OH)4 from local monazite concentrates was dissolved in 3 M and 4 M of hydrochloric acid, respectively. The aqueous solution of (Th-RE)(OH)4 was mixed with the organic solvent D 2 EHPA/K at different concentrations of 10%, 20%, and 30%, respectively. The mixture was stirred for 5 to 20 min before the aqueous and organic phase were separated. Thorium concentrations before and after extraction were analysed using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The result indicates that thorium concentrate in aqueous solution (Th-RE)OH4 is in a range of 119.40 ± 3.43-121.13 ± 3.18 ppm. The highest extraction efficiency for thorium was 99.8%, extracted using D 2 EHPA/K at 30% of concentration. The result indicated that the optimum mixing and separation times of thorium from aqueous solution into organic phase was 5 min, respectively. Therefore, this research proves that D 2 EHPA is potentially be used as thorium extraction agent digested in hydrochloric acid.
CITATION STYLE
Salehuddin, A. H. J. M., Aziman, E. S., Bahri, C. N. A. C. Z., Affendi, M. A. R. A., Idris, W. M. R., & Ismail, A. F. (2019). Effectiveness study of thorium extraction from hydrochloric acid using di (2-Ethylhexyl) phosphoric acid (D 2 EHPA). Sains Malaysiana, 48(2), 419–424. https://doi.org/10.17576/jsm-2019-4802-20
Mendeley helps you to discover research relevant for your work.