Journal
DESALINATION AND WATER TREATMENT
Volume 57, Issue 11, Pages 5035-5044Publisher
DESALINATION PUBL
DOI: 10.1080/19443994.2015.1006256
Keywords
Photocatalysts; TiO2 nanoparticles; PVA-alginate; Pb(II) solution; Wastewater treatment
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In this paper, titanium oxide nanoparticles were produced using the hydrothermal method and embedded in PVA-alginate beads to remove Pb(II) ions from aqueous solutions. The kinetics of the photocatalyst process was elucidated by varying operating parameters such as pH (3, 7 and 10) and initial Pb(II) concentrations (25, 50, 100 and 200mg/L). The findings revealed that 99.1% of the Pb(II) was removed within 150min and maximum removal occurred in initial concentration of 25mg/L at pH 7. The titania PVA-alginate beads can be readily isolated from the aqueous solutions after the photocatalytic process and reused for at least seven times without significant loss in their initial properties. In addition, the reduction of Pb(II) from wastewater using titania PVA-alginate beads fitted the Langmuir-Hinshelwood kinetic model with a correlation coefficient (R-2) of 0.9931.
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