00000ctm a22000004a 4500 UP-99796217611255523 Buklod 20140509130855.0 m |o d | ta 140509s2014 xx d r |||| u| (iLib)UPD-00216804416 DENG rda eng DMLUC LG 995 2014 E653 R58 Rivera, Kim Katrina P. author. Alachlor removal over Fe-TiO2 loaded on granular activated carbon support under UV and visible light irradiation by Kim Katrina P. Rivera. Quezon City College of Engineering, University of the Philippines Diliman 2014 ix, 64 leaves illustrations 28 cm text rdacontent unmediated rdamedia volume rdacarrier Thesis (M.S. Environmental Engineering)--University of the Philippines, Diliman. Available to the general public. Alachlor is a recalcitrant carcinogenic contaminant that may easily spread in water source due to its wide usage as an herbicide. The aim of this study is to synthesize Fe-TiO2 on granular activated carbon (GAC) support via hydrothermal method for the photodegradation of alachlor under ultraviolet and visible light irradiation. The effects of Fe-TiO2 loading, initial alachlor concentration, and initial solution pH were determined using Box-Behnken Design (BBD). X-ray diffraction (XRD) analysis of Fe-TiO2-GAC samples showed anatase TiO2 peaks as well as the graphite peak from carbon. Scanning electron microscope (SEM) images verified that Fe-TiO2 was immobilized onto the GAC. In UV photocatalysis, the interaction between Fe-TiO2 loading and initial alachlor concentration is significant wherein low Fe-TiO2 loading and 50 ppm initial alachlor concentration increased the removal efficiency. In visible light photocatalysis low Fe-TiO2 loading and initial alachlor concentrations of 30 and 70 ppm are significant. The interactions of the initial solution pH with Fe-TiO2 loading and initial alachlor concentration are also significant in which low solution pH increased alachlor removal for low Fe-TiO2 loading and low initial concentration. The highest alachlor removal percentages obtained were 99.74% and 99.96% under UV and visible light irradiation, respectively. Alachlor. Carbon, Activated. Herbicides Biodegradation. FI UP UPD DARCHIVES LG 995 2014 E653 R58 UPD DENG-II LG 995 2014 E653 R58 Thesis