Preparation and characterization of supported photocatalytic composite and its decomposition and disinfection effect on bacteria in municipal sewage water

Author(s): H.P.Shivaraju

TiO2/CASB compositewas prepared by straight forward mild hydrothermal processes.As prepared photocatalytic materialswere characterized by powder X-ray diffraction (XRD), Scanning ElectronMicrocopy (SEM), Fourier Transform Infrared spectroscopy (FTIR), Positrons Annihilation Lifetime Spectroscopy (PALS) and InductivelyCoupled PlasmaMass Spectroscopy (ICP-MS) to assess their physicochemical properties. Their photocatalytic decomposition and disinfection activity of bacteria in municipal sewage water was studied. The XRD studies reveal the presence of TiO2 in the form of anatase phase in the supported composite. The XRD studies further suggested that well crystalline form of TiO2 onto calcium alumino silicate beads (CASB) supports. FTIR results revealed the presence of Ti-O-Si linkages in the TiO2/CASB composite, which are responsible for its higher photocatalytic activity in the destruction of bacterial mass in the sewage water. TiO2 deposited CASB composite showed drastic reduction in the colony forming unit (CFU) of sewage waterwith UV light.

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