Elimination of Cr (VI), Pb (II), V (V), and Cd (II) ions from Titanium oxide Pigment from Rosetta ilmenite Concentrate Using synthesised Cellulose Phosphorus Oxychloride

ABSTRACT

The cellulose impregnated phosphorus oxychloride (COP) was newly prepared. Its efficiency was assessed for the first time by removing Cr⁶⁺, Pb²⁺, V⁵⁺, and Cd²⁺ ions from a diluted sulphuric solution of titanium liquor to gain the purified titanium dioxide. For the complete characterisation of the synthetic COP adsorbent, we used different instrumental performances namely; FTIR, SEM, EDX, and ¹H NMR. The factors of adsorption and removal of Cr⁶⁺, Pb²⁺, V⁵⁺, and Cd²⁺ ions from a diluted sulphuric leach liquor solution of titanium liquor have been optimized. The removal of Cr⁶⁺, Pb²⁺, V⁵⁺, and Cd²⁺ ions was achieved using a new COP at 0.25 M/L acid concentration using 100 mg COP adsorbent for 60 minutes. The maximum Cr⁶⁺, Pb²⁺, V⁵⁺, and Cd²⁺adsorption capacity and the removal efficiency were 132.5, 141.7, 121.5, 113.7 mg/g and 88.3, 94.5, 81.0, 75.8%, respectively. Finally, titanium sulphate leaching liquor produced from ilmenite concentrate was treated with optimum adsorption parameters for Cr⁶⁺, Pb²⁺, V⁵⁺, and Cd²⁺ ions removal to gain the purified titanium dioxide.

KEYWORDS:

• phosphorus oxychloride
• cellulose
• removal of ions
• titanium

Disclosure of potential conflicts of interest

No potential conflict of interest was reported by the author(s).