Photo Catalytic Reduction of Pb(II) Using Titanium Oxide PVA-Alginate Beads under Sunlight

Abstract

Pb(II) which is considered a toxic and common pollutant to the environment was removed from the aqueous solution using the one step photo catalytic reduction with the help of titanium oxide PVA-alginate beads. The photo catalytic reduction was performed in the presence and absence of sunlight at pH 7 and Pb(II) concentration of 50mg/L at the equilibrium contact time of 180 min. The results revealed that the titanium oxide PVA-alginate beads were capable of removing 98% of Pb(II) from the aqueous solution within 150 min. The titanium oxide PVA-alginate beads can be separated from the aqueous solution after photocatalytic process and they can be reused for at least 7 times without significant loss in their initial properties.

Photocatalyst treatment for lead(II) using titanium oxide nanoparticles embedded in PVA-alginate beads

“…The used titania PVA-alginate beads were recycled and reused as a photocatalyst for another seven repeated cycles to study the regenerative behaviour of the photocatalyst [9,16]. in the XRD pattern [10,13]. Also, as it is observed in this figure, red graph is for standard TiO 2 anatase with Pattern PDF: 04-006-9240 that with comparison of standard TiO 2 anatase nanoparticles and prepared TiO 2 anatase nanoparticles, it was found that TiO 2 nanoparticles in this study are pure [20].…”

“…1). The initial concentrations of Pb(II) in the solutions were ranged from 25, 50, 100 to 200 mg/L [5][6][7]9,13,18]. The influence of pH on Pb(II) sorption was also investigated at various pH (3, 7 and 10).…”

“…Recently, the use of photocatalyst such as γ-Fe 2 O 3 nanoparticles in PVA-alginate beads has been used for the reduction of metals such as Cr(VI), Pb(II) and Cd(II), respectively [11][12][13]. The removal of Pb(II) ions using the beads-included TiO 2 has not been explored.…”

A density functional study of the effect of hydrogen on electronic properties and band discontinuity at anatase TiO2/diamond interface

“…For the anatase TiO 2 , the a) experimental lattice constant of a 1 ¼ 3.784 Å is used. 17 The in-plane surface lattice vectors are n 2 [100]a 1 and m 2 [010]a 1 , with n 1 , m 1 , n 2 , and m 2 being integers.…”

Removal of barium from radioactive aqueous solution by PVA–alginate encapsulated titanium oxide using sunlight and other light types

“…21,22 2.2.2 Titania PVA-alginate beads preparation. First, to 2 ml titanium isopropoxide, 2 ml of acetyl acetone was added to 40 ml of ethanol solution which was stirred continuously at room temperature.…”