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

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 H-1 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 Cd(2+)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.

Automated summary

A new cellulose impregnated phosphorus oxychloride (COP) was prepared and its efficiency in removing Cr6+, Pb2+, V5+ and Cd2+ ions from a diluted sulphuric solution of titanium liquor was evaluated for the first time. The synthetic COP adsorbent was characterized using various instrumental performances such as FTIR, SEM, EDX and H-1 NMR. The factors affecting the adsorption and removal of the target ions were optimized. The new COP showed high adsorption capacity and removal efficiency for Cr6+, Pb2+, V5+ and Cd2+ ions. Finally, the purified titanium dioxide was obtained by treating the titanium sulphate leaching liquor from ilmenite concentrate with the optimized adsorption parameters for the removal of Cr6+, Pb2+, V5+ and Cd2+ ions.