PROPERTY OF NOVEL SODIUM ION EXCHANGER LI₁.₄CR₀.₂AL₀.₂TI₁.₆(PO₄)₃

Abstract

A novel sodium specific kind of ion exchanger LI₁.₄CR₀.₂AL₀.₂TI₁.₆(PO₄)₃ fabricated by a solid-state reaction method. The microstructure XRD, FTIR, Raman spectra, adsorption performances were investigated. The average grain size of the samples was about 70~90 μm. FTIR and Raman spectra studies were carried out and the vibrational bands were assigned. XRD analysis showed that the structure of LI₁.₄CR₀.₂AL₀.₂TI₁.₆(PO₄)₃ convert to Na1.4CR₀.₂AL₀.₂TI₁.₆(PO₄)₃after adsorption. The exchange capacity reaches 34.12 mg/g, under adsorption duration 12 h, temperature 50 C. The experimental results showed that the Na/Li ion exchange reaction rate increased obviously forLI₁.₄CR₀.₂AL₀.₂TI₁.₆(PO₄)₃ with increasing temperature, and the Na/Li ion exchange kinetics process of LI₁.₄CR₀.₂AL₀.₂TI₁.₆(PO₄)₃ in lithium chloride solution could be represented approximately by the equation of JMAK.