4.3 Article

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

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TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2021.1943374

Keywords

phosphorus oxychloride; cellulose; removal of ions; titanium

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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.
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.

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