Treatment of Pharmaceutical Effluent by Photochemical Oxidation on Titanium Dioxide
The waste effluent from Gonoshasthaya Antibiotic Ltd. (GAL) was treated by photochemical (sunlight) degradation on TiO2 prepared from ilmenite (FeTiO3). Results showed that after 18 hours of irradiation, 94% of dissolved organic compounds were degraded to environmentally acceptable products such as CO2, H2O and other mineral acids or their salts. The GAL effluent had the initial chlorine content (CC) of 7024 ppm and this increased to 7842 ppm in solar water purifier after 18 hours of irradiation. The concentration of total dissolved solid (TDS) in GAL effluent had 46,000 ppm which was reduced to 2600 ppm after 18 hours of irradiation. The concentration of total suspended solid (TSS) in the GAL effluent was 455 ppm and after 18 hours of irradiation no change in concentration was observed. Furthermore, the relative distribution of the number of compounds decreased with increasing irradiation time.
Al-Eakabi and Serpone, N. (1988). J. Phys. Chem., Part-I,92: 5726.
Albert, M., Gao, Y.M., Toft, D., Dwight, K. and A. Wold (1992). Mater. Res. Bull., 27: 961–966.
Bard, A.J. (1979). Photoelectric Chemistry and heterogeneous photocatalysis at semiconductors. J. Photochemistry, 10:59–75.
Block, Y. and R. Bickley (1992). Mineral waters from waste. Chemistry in Britain.
Brickley, R.I. and R.S. Stone (1973). Photoadsorption and photocatalysis at rutile surface. I. photoadsorption of oxygen. J. of Catal., 31: 389–397.
Fuzihira, M. et al. (1981). Heterogeneous photocatalytic oxidation of aromatic compounds on semiconductor materials. The photo-fenton type reaction. Chemistry Letters, Chem. Soc. of Japan, 1053.
Izumi, I., Dunn, W.W., Wilbourn, K.O., Fan, F.R.F. and A.J. Brad (1980). Heterogeneous photocatalytic oxidation of hydrocarbons on the platinized TiO2 powder. J. Phys. Chem., 84: 3208–3210.
Izumi, I., Fu-Ren F., Fan and A.J. Bard (1981). Heterogenous photocatalytic decomposition of benzoic acid and adipic acid on platinized TiO2 powder: The photo-kolbe decarboxylative route to the breakdown of the benzene ring and to the production of butane. J. Physical Chemistry,85(3): 218–223.
Laws, E.A. (1981). Aquatic Pollution, An Introductory Text. John Wiley, New York.
Matthews, R.W. (1984). Hydroxylation reaction induced by near ultraviolet photolysis of aqueous titanium dioxide suspension. J. Chem Soc. Farady Trans., 80: 457–471.
Matthews, R.W. (1986). Photocatalytic oxidation of chlorobenzene in aqueous suspension of titanium dioxide. J.Catol., 97: 565.
Mills, G. and M.R. Hoffman (1991). Environ. Sc. Technol.,28: 786–793.
Okamoto, K., Yamamoto, Y., Tanaka, M. and A. Itaya (1985). Bull. Chem. Soc. Japan, 58: 2023.
Pelizzetti, E., Minero, C., Piccinini, P. and M. Vincenti (1993). Coord. Chem. Rev., 125: 183–193.
Safiullah, S., Khan, M.G.M. and A.B.M.S. Rahman (1998). Photocatalytic Decomposition of Phenol by Titanium dioxide under U.V. and sunlight. J. Bang. Acad. Sci., 114– 117.
Safiullah, S. and M.G.M. Khan (1998). Photocatalytic Decomposition of Salicylic acid by Titanium dioxide under U.V. and sunlight. J. Bang. Acad. Sci., 6: 88–93.
Schiavello, M. (1987). Basic concepts in photocatalysis and environment trends and applications. Academic Publishers, Netherlands, 351–360.