Abstract
Composite particles were synthesized using titanium oxide attached to polyethylene (TiOx-PE) films by plasma techniques and used for the removal of Cr(VI) from aqueous solutions in batch systems. The precursor to synthesize TiO was titanium tetrapropoxide (TTP) modified by collisions with accelerated particles in the plasma of water in order to separate the fractions of organic and inorganic TTPs that reorganize into small organometallic particles attached to the surface of PE. Before adsorption, the TiOx particles have spherical profiles agglomerated on the PE surface. The diameter was between 70 and 120 nm in agglomerates of around 500 nm; however, as the pH of the Cr solutions increased, the morphology of these particles changed to fibred patterns. The specific surface area was 163 m2/g, which is greater than that for commercial TiO2, and the pore size was 2.86 nm with a pore density of 0.11 cm3 g-1. The study results showed that the maximum Cr adsorption capacity (5.32 μg g-1) was obtained at pH = 3. ...
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