{"title":"Solar Photocatalytic Degradation of Phenol in Aqueous Solutions Using Titanium Dioxide","authors":"Mohamed Gar Alalm, Ahmed Tawfik","volume":86,"journal":"International Journal of Environmental and Ecological Engineering","pagesStart":136,"pagesEnd":140,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9997532","abstract":"
In this study, photocatalytic degradation of phenol by
\r\ntitanium dioxide (TiO2) in aqueous solution was evaluated. The UV
\r\nenergy of solar light was utilized by compound parabolic collectors
\r\n(CPCs) technology. The effect of irradiation time, initial pH, and
\r\ndosage of TiO2 were investigated. Aromatic intermediates (catechol,
\r\nbenzoquinone, and hydroquinone) were quantified during the reaction
\r\nto study the pathways of the oxidation process. 94.5% degradation
\r\nefficiency of phenol was achieved after 150 minutes of irradiation
\r\nwhen the initial concentration was 100 mg\/L. The dosage of TiO2
\r\nsignificantly affected the degradation efficiency of phenol. The
\r\nobserved optimum pH for the reaction was 5.2. Phenol photocatalytic
\r\ndegradation fitted to the pseudo-first order kinetic according to
\r\nLangmuir–Hinshelwood model.<\/p>\r\n\r\n
<\/p>\r\n","references":"[1] O. B. Ayodele, J. K. Lim, B. H. Hameed, \"Degradation of Phenol in \r\nPhoto-Fenton Process by Phosphoric acid modified Kaolin Supported \r\nFerric-Oxalate Catalyst: Optimization and Kinetic Modeling,\" Chem. \r\nEng. J. vol.197, pp. 181\u2013192, 2012. \r\n[2] G.C. Yang, Y. Long, \"Removal and Degradation of Phenol in a \r\nSaturated Flow by in-situ electrokinetic Remediation and Fenton-like \r\nProcess.,\" J. Hazard. Mater. vol.69, pp. 259\u201371, 1999. \r\n[3] H. Kusi\u0107, N. Koprivanac, A.L. Bozi\u0107, I. Selanec, \"Photo-Assisted \r\nFenton Type Processes for the Degradation of Phenol: A Kinetic \r\nStudy.,\" J. Hazard. Mater. vol.136, pp. 632\u201344, 2006. \r\n[4] Y. Ma, N. Gao, W. Chu, C. Li, \"Removal of Phenol by Powdered \r\nActivated Carbon Adsorption,\" Front. Environ. Sci. Eng. vol.7, pp. 158\u2013\r\n165, 2013. \r\n[5] A. Bach, H. Shemer, R. 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