00000ctm a22000004i 4500 UP-99796217612279763 Buklod 20161027170539.0 m |o d | ta 161027s2016 xx d r |||| u| (iLib)UPD-00259710689 DENG rda eng DMLUC LG 995 2016 E653 V55 Villaluz, Finella Jianna A. author. Synthesis of ammonium iron (II) sulfate-doped nano-TiO2 photocatalyst for the removal of 4-chlorophenol under visible light irradiation by Finella Jianna A. Villaluz ; Mark Daniel G. De Luna, adviser. Quezon City College of Engineering, University of the Philippines Diliman 2016. xiii, 96 leaves illustrations 28 cm text rdacontent unmediated rdamedia volume rdacarrier Thesis (M.S. Environmental Engineering)--University of the Philippines Diliman July 2016. Available to the general public. 4-Chlorophenol (4-CP) is listed as a primary water pollutant in the U.S. EPA for its potential as a carcinogen and mutagen to mammals as well as to aquatic life. In this study, the removal of this pollutant through visible-light photocatalysis was dealt with using the synthesized(NH,)2Fe(SO4)2-doped nano-TiO2photocatalyst.The effects of varying synthesis parameters namely amount of dopant, calcination temperature, and amount of acid were examined as well as the effects of photocatalyst dosage, pH, and initial 4-CP concentration as operating parameters. Sol-gel method was used to effectively synthesize the photocatalysts, which were subsequently characterized by Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX), X-ray Diffraction (XRD), Ultraviolet-visible Diffuse Reflectance (UV-vis DRS), X-ray Photoelectron Spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) Analyses. Through the use of High Performance Liquid Chromatography(HPLC) analysis,99.20% of 10 ppm 4-CP mixed with 0.40 g/L synthesized photocatalyst in a solution with a pH of 7.0 was successfully removed after 3 h at the specified synthesis parameter conditions of dopant amount (0.10 mol% of 0.20 M (NH4)2Fe(SO4)2), amount of nitric acid (0.05 vol% of 65% HNO3/Ti(OBu)4), and calcination temperature (400°C). It was also found out that the photocatalyst can be reused 4 times or more at the same experimental conditions. Lastly, the Langmuir-Hinshelwood model favorably describes the rate of reaction of 4- CP with the calculated values for the rate constant, kLH, equivalent to 0.429 min and Langmuir adsorption constant, KL, equal to 2.326 ppm-1. Chlorophenols. Water Purification Photocatalysis. De Luna, Mark Daniel G. adviser. Lu, Ming-Chun co-adviser. FI UP UPD DARCHIVES LG 995 2016 E653 V55 UPD DENG-II LG 995 2016 E653 V55 Thesis