Removal of iron from wet process phosphoric acid using ion exchange method by Puromet MTS9570 resin

ABSTRACT

In this paper, batch experiments were performed to study the effect of Puromet MTS9570 resin on the removal process of iron from wet process phosphoric acid (WPPA). Various parameters such as effect of initial iron concentration, effect of resin amount of addition, effect of phosphoric acid redox potential, effect of stirring time and effect of temperature were investigated to determine the optimum conditions required for iron removal. The numerical results obtained support the experimental data on removal of iron value where 12.0 g Puromet MTS9570 resin could remove 70.0% of already present iron with very small negative effect on the H₃PO₄ concentration. The adsorption isotherms were studied to evaluate the maximum sorption capacity of Puromet MTS9570 resin. The experimental results were found to fit with Langmuir isotherm model (R² = 0.9927), the experimental data fitted well with Langmuir than Freundlich.

KEYWORDS:

• Removal
• iron
• phosphoric acid and Puromet MTS9570

Acknowledgments

The author gratefully thanks Prof. Dr. Kamal Abd El-Baky Head of production sector, Nuclear Materials Authority, Egypt for his support in achieving this work, valuable guidance and for his continuous encouragement, advice and facilities offered by him to achieve this work and also deep thanks to Prof. Dr. Khaled Fouad Mahmoud Head of refining yellow cake department, Nuclear Materials Authority, Egypt for his guidance and supervision in the course of this work, and for his stimulating criticisms and help in the preparation of the manuscript.

Disclosure statement

No potential conflict of interest was reported by the author.