Study on the photocatalytic degradation of styrene using TiO2 nanocatalyst
Paper Details
Study on the photocatalytic degradation of styrene using TiO2 nanocatalyst
Abstract
In the present study, photocatalytic degradation of styrene was evaluated using nano TiO2 (Degussa P-25) as a catalyst. The experiments were conducted in a slurry batch reactor equipped with three UV lamps. Determinations of styrene concentrations were done by HPLC. Preliminary tests were made to determine the necessary contact time to reach the adsorption equilibrium. In addition to photocatalysis, separate photolysis experiments were conducted but showed low efficiency. For the photocatalysis experiments, the effects of the styrene initial concentration were evaluated, as well as, the catalyst concentration and the initial pH of the solution. The experimental results showed that in 125 min, 99% of the initial styrene was degraded by photocatalysis. It was verified that the styrene degradation rate fits a pseudo-first-order kinetics for initial styrene concentrations (100-200-300 ppm), at 25 °C. Optimal experimental conditions for arbitrary aqueous styrene concentration (100 mg L−1) were found initial pH 6 and TiO2 loading 1.0 gL−1.
Aliabadi M, Sagharigar T. 2011. Photocatalytic Removal of Rhodamine B from Aqueous Solutions Using TiO2 Nanocatalyst. Journal of Applied Environmental and Biological Sciences 1(12), 620-626.
Andreozzi R, Caprio V, Insola A. 2000. Photocatalytic oxidation of 4-nitrophenol in aqueous TiO2 slurries: an experimental validation of literature kinetic models. J. Chem. Technol. Biotechnol 75(2), 131-136.
Barakat M A, Tseng J M, Huang C P. 2005. Hydrogen peroxide-assisted photocatalytic oxidation of phenolic compounds. Appl. Catal., B 59 (1-2), 99-104.
Elmolla E S, Chaudhuri M. 2010. Photocatalytic Degradation of Amoxicillin, Ampicillin and Cloxacillin Antibiotics in Aqueous Solution Using UV/TiO2 and UV/H2O2/TiO2 Photocatalysis. Desalination 252, 46-52.
Evgenidou E, Fytianos K, Poulios I. 2005. Photocatalytic oxidation of dimethoate in aqueous solutions. J. Photochem. Photobiol 175, 29-38.
Gautam S, Kamble S P, Sawant S B, Pangarkar V G. 2005. Photocatalytic Degradation of 4-nitroaniline using solar and artificial UV radiatio n. J. Chem. Eng 110, 129-137.
Gibbs B F, Mulligan C N. 1997. Styrene toxicity: an ecotoxicological assessment. Ecotoxicol. Environ. Saf 38(3),181-194.
Guillard C, Lachheb H, Houas A, Ksibi M, Elaloui E, Herrmann J M. 2003. Influence of chemical structure of dyes, of pH and of inorganic salts on their photocatalytic degradation by TiO2 comparison of the efficiency of powder and supported TiO2. J. Photochem. Photobiol 158(1), 27-36.
Guzsvány V J, Csanádi J J, Lazic S D, Gaál F F. 2009. Photocatalytic degradation of the insecticide acetamiprid on TiO2 catalyst. J. Braz. Chem. Soc 20(1), 152-159.
Ishik R R, Ishiki H M, Takashima K. 2005. Photocatalytic degradation of Imazetha-pyr herbicide at TiO2/H2O interface. Chemosphere 58(10), 1461-1469.
Jo W K, Yang S H, Shin S H, Yang S B. 2011. Utilization of Fin-Installed Annular Reactors Coated with Visible Light- or Ultraviolet-Driven Photocatalysts for Removal of Gas-Phase Monocyclic Aromatic Compounds. Environmental Engineering Science. 28(1), 43-51.
Johnson J T, Dziedzic D, Gross K B. 2009. Fluidized-bed reactor system. US Patent US754741.
Keith L H, Walters D B . 1987. Compendium of Safety Data Sheets for Research and Industrial Chemicals, VCH Publishers, Deerfield Beach 4, 3178-3179.
Konstantinou I K, Albanis T A. 2004. TiO2-assisted photodegradation of azo dyes in aqueous solutions: kinetic and mechanistic investigations. Appl. Catal., B 4(1)9, 1-14.
Lhome L, Brosillon S, Wolbert D. 2007. Photocatalytic degradation of pesticides in pure water and a commercial agricultural solution on TiO2 coated media-Photocatalytic degradation of a triazole pesticide, cyproconazole, in water J. Photochem. Photobiol., A 188(1),34-42.
Mouamfon M V N, Li W, Lu S G, Chen N, Qiu Z F, Lin K F. 2011. Photodegradation of sulfamethoxazole applying UV- and VUV-based processes. Water Air Soil Pollut. 218, 265-274.
Prestes T H, Gibbon D O, Moro C C, Lansarin M A. 2010. The tebuconazole photocatalytic degradation kinetics, Quim. Nova 33(4), 798-801.
Soares E D, Lansarin M A, Moro C C. 2007. A study of process variables for the photocatalytic degradation of Rhodamine B. Braz. J. Chem. Eng 24(1), 29 -36.
Subramanian V, Pangarkar V G, Beenackers A C M. 2000. Photocatalytic degradation of para-hydroxybenzoic acid: Relationship between substrate adsorption and photocatalytic degradation Clean Prod. Process 2(3), 149-156.
Zhang F, Zhao J, Shen T, Hidaka H, Pelizzetti E, Serpone N. 1998. TiO2-assisted photodegradation of dye pollutants. Adsorption and degradation kinetics of eosin in TiO2 dispersions under visible light irradiation. Appl. Catal., B 15, 147-156.
Mitra Farzadnia, Toktam Sagharigar, Majid Aliabadi, Majid Asri (2014), Study on the photocatalytic degradation of styrene using TiO2 nanocatalyst; JBES, V4, N4, April, P404-409
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