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Amir Azizi

Amir Azizi

Academic rank: Assistant Professor
ORCID: https://orcid.org/0000-0003-2741-6797
Education: PhD.
ScopusId: 56318653900
Faculty: Science
Address: Arak University
Phone:

Research

Title
Simultaneous photocatalytic treatment of Cr (VI), Ni (II) and SDBS in aqueous solutions
Type
Presentation
Keywords
Photocatalytic process; Hexavalent chromium; Divalent nickel; SDBS; Energy consumption
Year
2015
Researchers Amir Azizi ، javad Saien

Abstract

Simultaneous photocatalytic reduction of poisonous Cr(VI) and Ni(II) ions, coupled with photocatalytic oxidation of sodium dodecyl benzene sulfonate (SDBS) were studied with a trace amount of commercial titania nanoparticles and by means of a direct-photo-irradiation reactor. The co-presence of metal ions and SDBS causes metal ions reduction as well as SDBS oxidation to enhance and energy efficiency to improve. XRD and XPS analysis were used to characterize TiO2 particles before and after usage for the aim of evaluating the mechanism of reactions. The effect of major operating parameters, pH and temperature, was investigated. Under conditions of [Cr(VI)]0 = [Ni(II)]0 = 5 mg/L, [SDBS]0 = 10 mg/L, [TiO2] = 40 mg/L, pH 6 and T = 35 °C; the removal efficiencies of 55.4%, 71.2% and 57.2% were obtained, respectively, for Cr(VI) and Ni(II) reduction, as well as for SDBS oxidation, after 110 min. The relevant kinetic model jointed with the Arrhenius equation was introduced. Energy consumption evaluations revealed that operations at higher temperatures provide significant cost reduction.